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Agenda - Agenda Packets - Regular Meeting 11/26/1996
AGENDA SAN JACINTO CITY COUNCIL AND THE CITY COUNCIL SITTING AS THE REDEVELOPMENT AGENCY AND INDUSTRIAL DEVELOPMENT AUTHORITY AND THE SAN JACINTO FINANCING AUTHORITY DATE: November 26, 1996 TIME: 6:00 P.M. PLACE: COMMUNITY CENTER 625 SOUTH PICO SAN JACINTO, CALIFORNIA 1 .0 CALL TO ORDER Roll Call Pledge of Allegiance 2.0 SPECIAL PRESENTATIONS 2.1 Presentation by Riverside County Flood Control District 3.0 PUBLIC COMMENTS Any person. may address the Council on any subject pertaining to City business not listed on the agenda during this portion of the meeting. A limitation of three (3) minutes shall be set for each person desiring to address the Council. 4.0 REDEVELOPMENT AGENCY PUBLIC HEARING - ADVERTISED 4.1 Amendment - Five Year Redevelopment Implementation Plan for San Jacinto Redevelopment Plan (Cont. From 11/5/96 RECOMMENDATION: Approve the amended Redevelopment Implementation Plan. 1 5.0 CONSENT CALENDAR - CITY COUNCIL 6.0 PUBLIC HEARING 7.0 CITY DEPARTMENTS 8.0 MAYOR/COUNCILMEMBER REPORTS/DISCUSSIONS 8.1 Councilmembers Requests/Reports 9.0 CLOSED SESSION 10.0 ADJOURNMENT Pamela L. Lee, City Clerk of the City of San Jacinto, do hereby certify that I caused to be posted the foregoing agenda this 20th day of November, 1996, as required by law. City Clerk 2 . - ouimpli---_,„...............___ . ......____. ,�,,, ,... , } W� i r v J1.t,. , Y• , ,. ____7 *-f!s�a tii.y. }- 1o; _M1 � simen J1' 7'�' 1 • ,,; 't • + i !, u �s 1. I O - a?�•-.�iM`,r• «� r , .‘ i __�- 1 I_ �.. •I. I-f ,4. 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Table of Contents 1 BIBLIOGRAPHY30 / RECOMMENDATIONS 1 I 4 GENERAL ENGINEERING DRAWINGS 3 Introduction 31 Authorization and Scope 3 The Problem 1 Study Area 4 Drawing No. 1 Index Map 33 BACKGROUND INFORMATION 2 Station 247100 to Station 266142.30 35 Early 5 3 Station 266t 42.30 to Station 330i00 37 ill rical 5 4 Station 330100 to Station 400100 39 Flood Control Measuress 8 5 Station 400+00 to Station 475+00 41 it of Engineers Study 9 6 Station 475400toStation 510t00 43 Hydrology 7 Station 510+00 to Station 588 t 00 45 Public Works,Utilities,and Transportation 12 8 Station 588+00 to Station 680100 47 Considerations 9 Station 680+00 to Station 772t00 49 10 Station 772+00 to Station 802+00 51 . ALTERNATIVES TO THE PROPOSED PROJECT 11 Station 1211+15.42 to Station 1240+00 53 13 12 Station 1240100 to Station 1320+00 55 Methodology Introduction57 13 13 Station 1320+00 to Station Highway 79 Description of Alternatives Considered Evaluation of Alternatives Selected River Control 14 15 PLAN,PROFILE AND DETAILS 20 14 Detail Ellis Avenue and Dip Section RECOMMENDED PLAN San Jacinto Avenue 59 15 Highway 395,Bridge and Channel Section 61 General Features 21 16 MWD 1st Barrel Lakeview System Protection Details 63 Reaches Railroad Canyon to Highway 395 65 22 23 17 Detail Ramona Expressway Highway 395 18 Sanderson Avenue Realignment and 24 Potrero Creek Channelization 67 Nuevo 69 Ramona Expressway 26 19 Channel Sections Lamb Canyon to Highway 79 27 20 Channel&Levee Sections 71 Cost Estimate Summary 28 Station 730100 to Station 1255100 21 Channel&Levee Sections Station 73 'IllSPECIAL RECOGNITION 29 1255100 to Highway 79 / N il List of Figures List of Tables Figure No. Table No. II ....... .......................... J iii 1. Flood Flow Magnitudes...................................... 7 1. Vicinity Map 8 2. Regional Location Map 2 2. Standard Project Floods 8 3. Drainage Basin 4 3. Summary of Major Floods 4. Design Flows 10 III 5. Watershed Boundaries 11 • 6. Reaches 21 ii. all • it s Fac �%xlj�� •a_ii' /- �, i 11/ t Ft•1',` / _ 1 I 1. • ,. 1 `.11 jtc� ,...s • ...� f` I e • ,i `i ,, a,.•e 1• /!,.e ©`; r t1 ..• FI• �1 . 1 O r • •<. .' <A i =m, , t ,'t ,., !'+ -. �C 1F • i.-i L�, - rt• f_ S - -{i • ' • - .r.iIF <111 ; kl�r d• it 1 1 .i `..• 'b ie �/4 iA1 ' S • ' 3 1 �. . _ t •t�y3R• ��r: j1,t. .1 ,j �--� 11;• _ 1 i ! i• .__ A, 1 '/- a-� j ▪ iI�1--,•r'r� f ' I I _a r 1Y-\-,„ a is• .. t 1 =,;.•�I j;1. 1 ° y Z. @ , t! ;! , , {' : , _ - i ^ .` it\ il a.• ly` 11 i t t I'' i, f :t �C I' i v,'j`. „I!' ,r f ',1 s jl i j• i-° '3,€ I' d_!x °N <I :. -_ l 11 I`� i F+/ I. 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J . . y 1i t —, t •r Z.' 1' ijoilkIl -.. ft , 1 my w --->44. )-- ,. i v N General i t II , k rAuthorization and Scope The Problem The Riverside County Flood Control and Water Conservation District executed annto A ey agreement with Neste, Studio& Stone Incorporated on July 10, 1973, for the region of western Riverside County.River flows rThis ly rand region in is fully described the rsection ris tof II necessary engineering services to prepare a plan for the control of the San Jacinto River from the effects of a once-in-one hundred year frequency flood.Considera- the Master Plan entitled"Study Area." 'ion was to be given to the effect that the control system may have on the envi- Historically these valleys have been subjected to major and minor floods. Flood p ronment,transportation systems,utilities,land use,and existing flood control fa dilnme control improvements have been constructed in past years by a number of agen- • cies. The most permanent control along the San Jacinto River are the levees be- Uni- Under111 the terms of the agreement the scope of the authorized study included the be- tween Bautista Creek and Highway�9.These levees were constructed by the(ollowing: I ted States Corps of Engineers and the Riverside County Flood Control and Water Conservation District in 1961.Flood control improvements downstream from the • Prepare a master plan for the control of and protection from a I Corps levee are not constructed Iola standard required to contain storm waters once-in-one hundred-year frequency storm on the San Jacinto Riv- I that can be generated by a once-in ten year frequency storm. er and determine the facilities on the San Jacinto River and major r Large areas of highly productive agricultural lands have been inundated by flood tributaries required to provide all-weather crossings for the major transportation arteries. waters spreading out from the river channel,causing heavy crop damg e.Other long term effects such as erosion and silt deposition on agricultural landsare c st- • Study combinations of reservoir storage at Lakeview and in Mass ly to remedy. Residential lands, resort developments,businesses,farms and ranch I acre Canyon. headquarters have been isolated by past floods.Emergency services have been dis- rupted by flooded transportation and communication systems.Washed out brid- e Study and recommend debris control methods in Massacre Can- ges, roads,downed utility lines and damage to underground utility services occur yon. during major floods. This Iloodin • Prepare cost estimates for the Plan including construction,reloca- g not only affects the orderly growth of the region but also causes im- tion of utilities,rights of way,and road crossings. mediate hardship and inconvenience to property owners and the travelling public. { • Prepare plans and profiles of the proposed improvements at a scale I of 1"=400'. I The District agreed to provide all basic hydrologic data for the San Jacinto water-shed,including the design discharges to be used in developing the Plan throughout the entire length of that portion of the river under study,to furnish the engineer with topographic maps of the San Jacinto River and its drainage basic,and to make available to the engineer plans,maps,etc.,of improvements planned or con- structed along the San Jacinto River study area. • 3 t { ' -ilt. `'.a te+ ,, r. S r .,� - t��, II Tr`• i_ '_..Y - ai T_. .- � ,y ,F Irk .>r i� Y'� �r `y., . `* '• s.•i �.'.")''1? .• � "r :I.T..7 _ . o c_22 o >i: • r S o!* t -,-;-_!r' "' .i.•+."'y..u...''," _`r._.tom 1�•. Y'� _ As o' i r s Z - E^•• i•: 11th .p';g '�• !ICA .2 _iTit"S.l.,1 7 _` •..au I .}6r4_"`•.' •` 1 D q ••• L 3 es v L o S. �+� - - — r cB S - w o �� • - , ! -i� =Z.�1' +-•pa ,. • r� x ii l o''2 9 c -5 • w \ �" fir _ t '1j 1 j nLj c.:'± A'" -. ..-' 4 2E-02 ••c ,`= o&722-o ,;� ^. ; �. 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Yea =¢ 0 0 0 0° Jh -• ace+ Uo� UA > Ucci U•n°^'3 mcUjO:vi aE ' .= :: 01•o•E ! u o `.. ; O, m u¢- C C CDC=Q Q ;'co ^ n ri Ti 1= ; ° °u am Etn o >- g „ a- a N m m E ° o = o`o F o ° a o o_ m a`o LL d ; c r m =o� m 3C� - ,_T o m -v > ^ f m o o m t „ m C y= C 'Y `m .e,1 - �_ a, W C- m O J > L - N- 3 „ ; FU o- .E m e 1.' „ C m 7 . E, 2 o ^ m c a`, g E c c > m ° d ° ° °-u= c m uN E� d c m E . k >„ m m o6 3�n _ c _„ mW c m a m „ , u R= m� o,o� �' c 3 d m �' d 21.2A� � c � o ° ax,� � R o y c' �c d d ^ > N tu m y E ;u .' N_ • § 7 a m °= m C m - 0^ ,;, ° _ ¢ a m �1 cQN c> V a> E °c 3 p m �'o •,7 -= ¢ ^mu - ° E-° o >> _^ c z a m 0 cmE m mE >m= _ ''8, m= m.^ o. il1' - -RE. -T_ y_ >TO me E mmo o m ; S W d ti sal ,`, c-1Z mN „ ram E „ ,`, - cn m^' 3 m L m L d �>,° -�i m C m L o C ro U a -'9-1 8 a N Y._ m ti i` d d et :- MI E i� - _o R ° `m C E G a0i ; y p m o=' o,<? o m Y _ a>-_,-C. C a, E c, o o, • m._ " ° m T m 9 uZ = �_ u c_ ;o ,,•� m= c > m m- o= m c .-V c= > = ° F= .�= a`,°,•g m m -m Z m= A Ti O c C m 1,o E m Z c°i m 5 C N C U'>¢ m d ro m o C a`m `m¢lL m d C a== O F n . - C L „ m >=, 0UM a m A m m .2 ,c y>„ c= c Q- > C o m 3 o E „^ u - - d 0 tic afUm== c _ or= = `'. om > m't m ;- - Q.— E O 0 d=3c ° UO' vETE.T ! m g,.d,Z � m °: 2 ,. mmo ;_ c > J � u € 5 N . c•` m •a` o,0 4 m^ « m E c> E o`cO N 63 c -c E ; C, u 04 S= y w- T N C, , C .m m m O - _ ^ m 2 O Ftir 3 C m C wy cm= k'_ !d „•g= ; oo >10UL _ $ c � � mgt '-,; gdEocw 'coo . �I •m_ O¢ m •- � omi ;* = tub,= '� ` m0 °= , E =v t ima c = °' >= -vi ° d 10- "� 0 3 --, c u c c m o c `o u to � cu,zEm ; c ; > gzcuA . F-, Nan3 N N_= „ mo . om . > A ° 1=-2 -72 m�, E ~ N >ax' g>- „ g'¢ ;=a - E pO ; °5 cO NoEumd ¢ '¢ rm 15 , c 0 .2 2L1^ x=> oo = od moo . um:cm 1cQ r , - o00 `o ifl. u it Stu- - m o •>•`c=c E =coma Q c ti - _a . m 29 & o- d m_o - o 0 ' moCmu=Uoc u.O _ ° m.? ¢ aam crmcZE ^ cE `m � m; N Ear b10 1 c u c F--' o m-�'i' '9 2-- `I c E ^ m ; E E 01 c E rt m e bd m c 3, 3 p-�0 .7. -E c N_ _ u a„ m o c E c= o m E¢ '� '° c°'i m E E 5 H N 7 =m C �_.. > C m C= N m C`m-y m'_ O m°' n m ,9.5 n,, ° `> x a O=_ '• wr Lco ,`, u6-.= Em �' „ u - oEEl; mmum ,e mem 3. ° m u `t.c „ E._ ow FmC.E=0cn '> c> o-�=oumcsc ~Hh=-mC 1- o-J¢>¢ «°i : m-, 1-ammn Fn�' it = ,.""a.Y?,�{rrdi �+11�x��1` e. .i11•Y R'�, l ' �� +„��I'" n�t(j�}�tV144; e• oirs r *it.) m '' Eh ' +rR.l�*<t4 -",r••� ty termtne the need for flood protection along the rivers.The study • j { afi 1n !.,•Y tfl;•� 1•► +0 . proposed the - � {� i1,1 1 t mfilljas► ,,i � :j{„�tvi L'F`,;} construction of a levee along the south side of the San Jacinto River extending >{ { ! r cc l "t� rJ v r�4y��. from the mouth of Bautista Creek downstream to a s r tee `r, ,114=i?t F sr- T <A t man Hot Springs Bridge). point nearmiHighway 79 Gil- cAf �,; r yr ' tl t 9s 9e1. This levee was approximately 4 miles long.The pro- ! �;a , { • I. -f s S posed improvement would provide protection for the City of Hemet,the Cityof 1 Ml ,�r tl� ` try • s t i ,r ... r / j •; TJ j� u h rSr„`•,+ } �V{,� y 1 1•• San Jacinto,and adjacent valuable agricultural lands from flood damagecaused by J ! 'T =•• IX' •• +r 1 is + ; IV,' , • 1 the flooding of the SanJacinto River. ,+ r , i y l:-` In 1961 the United States ArmyCorps of Engineers levee was constructed and Is 1 1'! ,'.}va 41ro 'e'I ', - �, n', * ri -P • !{ + . f'1,�1 P ,}•` • the most'ji ! ',�)t x'. 4. :{r, r - �i I • a it i�_ ;( prominent permanent flood control feature on the upper !tr �,;yc1} r� }� i y San Jacinto River. portion of the r 4 uC f ` ' r } In 1947 the San Jacinto Levke District turned over all their levees to the newly 1 �• .11' 'kid 2,,al� r , s M t a ` •• t4r?�` 3rl+�r '` (Si• s "I . t: formed Riverside County Flood Control and Water Conservation District.Since • x f; � 0 r +!r!1'j�X I '1" I ! `i ��z ir` its inception the District has spent over$2 million on the San Jacinto River:$1.5 a 1,",..4 .}trt;i I, b }..•� ` ,�+s. u, r Ill y� �y �y -r;i _'t. 5r t,: In addition to these Flood Control ;• '?� kt District expenditures, •"ems.-w•• .1• ' a '•,, t.I. Corps ofingimprovements United San Ja 'ice•' - j ty' I Engineers scent lk f: , . millio n Army the• �.. to River and Bautista Creek. An additional 2W,pp0 in Federal funds was spent • ..��• .'4 . if\�( 1 �Fs % ! '� ; '�t,t•r 1'lelr=f•`e 1 r+� $ r• ,�, y►; r,u F s i A+•1+-r�[w• after the 1966 and 1969 storms to maintain the river channel and to dredge sands • ' : 4 c ` �lyfjk„ .y� {� :1• • .y Iromtheriver ,...t ..i.�• r,✓1.+, t i i7, which were deposited(here During these storm s. 1 f''`� �i r t fi , • r y ; _ .- Major Riverside County Flood Control and Water Conservation District projects a- 1 ...r_ �,'., .rf r � �� r` y''4 +'r.'s , - lorr the river • + .- ,�,r0..i1'- , A11 L r 7!Ytr 9 include the following: '�` i e E c'1 #�,4-.S. . , ;,� Zee' 10,;c' �1• '.:•, t �; • Construction in the ;{ { ► 1 r,r_ "` is •; r, early 1950's of t � �� ra levee tr y: I.: ,.6z. .j.. -t . 5; J' ti Xi IA ,. .' rail eerevetted 1 ,.., ••y ,�, 1 Y }; 1, : . .. ;� r� I along the sou with wire and • , g'� - � ti south side ,,t +< m ''1y 1�j «� of the San Jacinto River from Bautista rl 1-,I7,tt f `Y:1• • 1;�(} t '.f ,� Ik' •�} j r i Creek to Gilman Hot Springs Bridge. • fit¢ r . 2 ''. .4 ,),•. •"f e- ,• ,- +' • p� s Construction in 1955 of a sand levee reverted with wire 1 i. • 11 P 'T s l 'Po , t� long the north side of the river from Bautista Creek downstreamd a- SS �}`4k 1 }.> t' r ft t „ ' 1.,, rai ,I � � `sd'r *1 � u3tpt, 'f y , to a it .r y (` ',+,. ,} c, .'' e '�s 4i•` { r�i¢r ,'1 point one half mile upstream of the Main Street crossingThis • t ti t r,' s-.Y 1 i+ Y! ? construction ai ► ` .t►t§ `1° + . ''art' } a ;TV�^ t �f a � ., Allairs. was a cooperative project with the of ndian ]1j Bureau • `s1-s*; +* Irf •y pyF 4 �ti, i y r f-!z•,,,j�l't'- .,. !..t. f;1 • Co nstruction in the late 1950's and early 1960'$of an excavated, • lr zoidal channel between Highway 395 and the entrance to�_� ' t(.n: -Ti.,!, ;!ti i!,./ Railroad Can on. 9 Y _: .-i Construction in the early 1960's of a concrete faced levee adjacent y e. ° ai .r,� .! to the Gilman Hot Springs development. This levee was extended N. 1etf "3 several hundred feet downstream following the 1969 floods which r `.st,3 f; 1 /r , , t - 4, ' L r j washed out a reach of the levee which was not concrete faced. CEO � ,> ` 4 • Construction in 1965 of a levee with riprap slope protection along ,,it S ++ , ,1 o a the north side of the river adjacent to the golf course at the •�y �' j 1' ?4, - .y,rt ha Springs CountrySobo- 'I, Club. 1t5 F • • ' i l r r l�. -__ - '';ell 1t,f yi. bythe Soboba Hot Springs Corporatiorenthe ons[ruction cost was borne lr m��yic , rt :):41;i: . ' T ,- ) A ! b` • Construction in 1970 of a concrete-faced levee on the south side4 ii of the river extending downstream approximately three-quarters 1' ° y 'l r °;S s m! (�, i of a mile from lime end of t� f • ;n ' + `*a k the Corps levee. 71 '� i ``IP7 �,� y: `T4 j '�'•r�ribj . . •"--- -- -- ., •I - .....r.:• i ---.."•- -%.' - . .,( ...... .„, ,.,.,,i,.,;.ik; .: •.......*......,-..,ti.............,.• -.J.,,,m. --,--... , . 4. . . ,••- "'"-•••••=t-1... ..444C4‘1.41t,..- ' le (--- zIk&":.•7 ••-- •- - --, 's ---- .'• . . .. ., , ,,-. , .7, 4 ) i..-1--,-v,-. •.4'4 -rii."..zth-4..,t`..4 4.1...4 j:•t,;,.h...:,:i.: i-4:„...... •4• • , 4'1 vl?,e.j .Tg!••44Ali "'- ' '"--t:42.-... ..1' .,-ig•-•••••••••44--;C•or 4-' !- " ...„,ifiar?'• :-. - -;,..,,,,-. -lati'Utyt_ithAtii.P.'ha&i.iii•444',* t '••iii&.' 'NI t pila4Vcar, , ...... 14-th041•11.4. • •••• It; • t,,,J44.4 i=•,- ...« .... .......y.teigt$11 •• , v L Flood Flow Magnitudes •-•-i.:-. -.- -...--1.5aUri;wok 1.•.-,-.,..i-4,4 - ...• -. . :__:...-.. ...._ . ' V t xl _..-•••,--. -• :.r'", ••••••••-"--.I.; ..ZE...:"..-,•f --*:"%-•- '''''- - -• 1 * L Table 1 -3.1fitterk.,."•• ..-........--•7"•-7. •------ tar..••••••; -.7.-.7., •. - . • • ,, ••,,,,,... ,..., . - •••.,. .-17!.11-''•••• •--..... ..t. : ,.4:- k . ; " • • . . 1*:•7 '..... .••••-•.......s.s :•• t ••,; . •s.:,. •' . . • .. :••••, . • ..• •. • - • SAN JACINTO RIVER BASIN FLOOD MAGNITUDES -,: . , .....,..„.,..c...._.:....„,,tmatiuni.,-,1:40ve. ,. . . - s,_.< :-7.7-7eilli,.:!:;,, - --. -.:• .:.-,L-1- 'P... . ...au 4:-. .-zv. ....:14:iif..14r4i.m_ Pau f 14 4 . ' 4, , t 1 1984-1969 • 44.firlr"':;7;;*1;•*t.,'F'f--2*-..4"'"4,r7 7-r-"P'--$ ''''''' -";,,,,„P"•-7"...;,iz;-44-,•i.,T3-*•.*---..,---1X,7*..:7,7!;. -,-'..-- ' I ' :1411;•=--re.i..*4e.ife•4'1.1.r.'.1tg.i. r-.17. ' r. -. -.11'3't''Y'll''riVil*.Y',-7..*'''-'..4**--' 7.i.F.,•-"444•7:".;..'.7.-74 .: , ' Location of Peak Discharge ...:•.a.•4.1 :;f4V4i., a,...kr.:', )1• ' r ITII •-••1 ,411:1Vr,a.:.:. •........:.,:•:,•...•7•Tft.4••• :,•`44:IT......7..7...:;•7_,.••••i • I .' ''' ,I Storm Date Observance Ids) 4-01,:....0001.'f:..;;;I:-:-......:1":71.1.2, . -:-7. -,--•,c•,:t, :.:7-...:Itint..*".1.17:1:fr.1.441111k.lr'''::'"1:11',.ii._':::7;:t".1!".•:: 7!17,, 7-7'.:1'-'71.:!'17:::•:":1-11.1-......- • , , I II, February 1884 City of San Jacinto 44,0001 AliiK.V4 , ' :•......'tat '':'•••••.4“. 7.-11- I---.,-....-• . ."........1.- ^,44'44;t1ile'ii.: March 1884 City of San Jacinto 73,000 t ,,,ia. I ..01 ,Vt,.. ,..";.V. iplA. .z. 1...; •• ,, .-•••';' •a Za.p. '''.:! I• !!..,!...:......C.1, I .a January 1886 City of San Jacinto 11,5001 itftilePr''......1- I'..'-:'•:....i.u.fi.'.'‘ --''' .44 7 * '71 ' 1:41a.a.414171'%...4;12143,1-•_.• . - 1 " . , I March 1880 City of San Jacinto 5,500+ .i:'''''''-`11srr..' ....,:1.4*.i1 - tt 1,' •- •..-4'Emii.1•:" -4"'IMP*VItirvabi ., December 1889 City of San Jacinto 10,500+ ,.:17a2,, kf.,,,.. ,./,•;,11,yty,. ..rw,-,-.eit ' '! !'7"-z-2.....2-'•"n:`f..t-4;44e.rii-- , • , •ii,,,i ff„-,.,*,,•.•••:,: . ,-,„,... ,!f 4.. „ ..t.;„ „:. va...........,. ...1•.; , Azi.v,„,....February 1891 City of San Jacinto 29,000+ , 1 December 1894 City of San Jacinto 5,1001 .T-••*r,lic*-1., .;*.t:44.43,1,,,12.14.1 . y.e4,,:'..... 1,.-.••'.- . ...I I. ..., • April 1903 City of San Jacinto 8,5001 ... 7.. .....1.11A4t-s00414.4. ,v•Ill ..14:- ••••101 LI .•;: • 1.1 •••*• • .•" I ""....1(1'1'..1 si-el•'/:;.''''' 4)45$.11. ••••••4.11;1 'AtttitV*441,ws•L''P-i't• S42•.•:“I'`'••••• •. 1 '1, , .March 1906 City of San Jacinto 14,500t !,..,.,:..'4 If(tt.4,41::;;;.:4:::T.,:..1010! • 1 A V4:-4 Ai 11 nrir''41•Fe•I'4 ir t 1 r- ',' ..„: ci. I •January 1909 City of San Jacinto 7,5001 • .1,SW( •t•tie) 1,.1.e.7‘,4. tit.•tat.")rt .' / , , Cr :tv. *J..;•N 31 '01... «g ,.. 1 ( , January 1910 City of San Jacinto 17,5004 • .7-7'. i iik. C. ..".;;:.•,.;4.f.,5. ..::. .it s.t . . • .-0. ,:wilti,i.l..,A.%„i•-t,r'-..i4Ift..9..••••3%. • ‘).?"-••-• , ri • ‘ 4 • t,- '4 ' ''' l l'' 3 '. *s• ' , February 1914 City of San Jacinto 6,5001- ,., . •......,.., ..-•• . •••17....A7 1.4,4,-.i,... -.....‘ a. .1a.. •I.1.•••14a ..t,.. 1.,,••., • 70.T,11. . •r.:.•'-'.,•••To.vt • , . .St • S . '64••• •01••••• 144.. •••••7 ....1 . • ••••. • I 6.••January 1916 Highway 74 Bridge 38,0001- 1 I January 1916' City of San Jacinto 55,000 t *- l'• * 4' ' '71illta72).1 I';''71' ' ; I I k 1.1'. • .7-.:... . .. . .....• ....„..• -7.... • ll.'''1 11 1 14'1 4,4 ,1-110'50Itt'ii.01 0 . - 1r.4 ...h.'.'''I .-&' •••••• •l'.• -....: hi February 1927 Highway 74 Bridge 45,000 0•Xl, •, ..f„. ,?,..I. • , .. .' ..1 .,,,,,Y.11.1"........ .J..•••-• 7 ...,- 1. ••,,-; •is . . li.t.!. 'f.'‘ - -:•;•. - .,;y7:1-",::':.,..4..,1, :..'.:r,.;;‘,',5;:',•.. • ,..,. ; '-,i , :••„*...-.•.:.•••-„ :, , .. , ' • February 1927' City of San Jacinto 65,000+ ft.; 1:11, r,„4 ; .:.. ,..„0.=.11.:•..1,,?''AO"!1.,11.'cf ' '''': ,' • . • ...' ..;-:'. -; .‘ August 1931 Highway 74 Bridge 6,0001 i t ,i 1.•,•,.... t. ..,.., .,...,,,,,,..,,e...,. .*,,I.itiFlt::;‘1..:.f....,......;•. ..• -... -..,..-.: •••....1-,..•,h • S : February 1937 Highway 74 Bridge 14,000 ' -1-1.1. )11,11'!' .1. ri,,t,:j:,:itk,-,,,q vii...t.f.1,4 •--1-4-Ai. •:1-.'•:..1.-• 4 .4 4-1•4 •,h•.i - '' .... h . -.:1 ....I; .;',At t.:1..‘i,i 411!...:,....,,ifi . .,e•.......:-.1..`'•v.,..21.1,.1.•:. ,;•.:.,,6•,..;...:.:ri.;,..;.!.z.,,,• ,±.. fp 1 - •.> March 1938 I lighway 74 Bridge 14,300 ,,,...,,,i..1,.....-„,i 4,77.....A.,•;,".7...,..„4 T...,.,•,,,.."•;,,.:?.-?:•?Ls.?.53,14....4.4.3...,•,.-,....,.,s,is.. ?/•.•,.t..-• • •,t•...'1'.0'..1;.k•••••N;I.1.,. .wl.:04,•it.1 NIK-Nim,-.4....-,.-,-;•-3.-,..,,..71,• ,t- 7..•.• • t .-1 ‘ • . •• November 1965 Highway 74 Bridge 6,310 ,,•;(1,)1;,....14,1::4171.71. ..f I:1`...r.1.:q40:*,i1:1.V.ir•Orfli-r-iii 'hil"1".4 •.1, ',:."-i:,',,,'.,.. December 1966 Highway 74 Bridge 5,720 ,,,,.,, .,,,,.;•...,.‘,..14.411,4-p.ikle;2!..~.4.4.1..“. .4i. •...x.--44.....1,? ki;...hi.,• 140'•,-, 4.;..... •i..: ,i.1-,,,•,....,!...„i ,,,,,.,,,_,,,.:..,..,,,.,.c,..,p.‘....:-..,..,,,..,..3"..- ..,, .. . , ,. ....... January 1969 Highway 74 Bridge 7,410 '.4:i,!,".1!..4-,',. '`....!--:•.%41:',V;I:gt.1-frti'llit""•14;gt.-.11!,'-',.''44;!-_.,'- !--.....i'c,„1:;."4.4.1.4s-t_K-4";., 1-';. • ' ; February 1969 Highway 74 Bridge 4,080 •=:•-•7,,;. ..*-:7,-,4..,';''.;47;TP i4l'?"•%.(..",i'lli.,:•St4.:&I1171:411 ''•;..t11,••;:',-- I; .-1-...1:411:at.14...,:- '' ''.. ',v!..,: 1 . 1, t:41- ',11.,1),,i4" '‘,".011P.O.Y.(0;7.1.M:giiiilat.,.;3136 1041.-.2. ••• iift.I.:'V:.:. :';) "It -.0 .,;;;;11- r...*.i. , iir t . •Estimated 'F'':/•',... :.3,4,,,•:.rrii,•41'..1A-....*•••sr''--.31 :if;q.1.,,....,./!, ..1.0, •,,". .,.,,,,,tc,t3. a,..t.g.-4.'.•,,'.41,4•,..„. tt..,,.:.14....-.,,,..• si•,,t,ietnar,c,Lve,,---1- ,-...-A.1,-,.....;41, •.,I,;1,•••14%4, 4,.*Ail•(„,,,,,__.,,, ' '• li t'-#P 'Same storm as one above gagrd at different location :1'.,?..ii*:'....:1:::;;Iti**,•-,;; ;•,..11.11,;•T•4.'ib'Nsloot ''. -,*,•:#1,0:!Ith-,ir.--,it...4.:,,,,...i.;:,,44,40dvitqc 4440.v... .4,44A1Vii,,,,•:,,a.,Y 7. '•-•I ".:-.-14. • • .• • •r .' *•'. • **".1'.!...-Y.f' klf.ii•ls. ) 4.17.1.4);7`. •'-' , • i * - IL yt.'",•;;/',.... . ;•,;!• 1'47,r... , .:,;. ,, 1 :i,.Att -..a, api x 4 4.,,la ,4 1 ..;.,,1,--0...-.. .:,..:.•7 rik g.vrtilt • ,Jya;r , , ;..;') * ;.:4i:•:;-•4,`,1/pr... .:'^-.'.„ , ...:.,.. .. 1,...7_,. , ietti ,..,;,..„ _ _ if. .:.1......pi, i..,:-.1f ...t....4.si. . . ..4:iik... •• Note: ••:r•VUM'i •-:- •.•' '' 1;1 ,4.•l''f,t ..!.'sli.:2'....-,`?••••41'.. '' • S, , i„ ir, , ill , .... ,..11 1. Reliable records prior to 1915 are not available.(Discharges are estima- •i, •ofif• •g;•' ' 4.; ,•!: ".c.el:. . , ,1 ,. , ,..le,,!,1...“ .1.,,.. (.1.i ...;:it...41t. / , . 7 • e Or I,. • ',. •, lif k . itr..., , t 1 tea . .. .tir... . 1.,,;.-.---,,..;, :..::'.; . ;'',..-.•.'''l'IT" *'".' ).1-- A 41!fa - 1 '• - ' . ‘,i..•.'' ,.:Irl•'• 11:(.1 ;--A-:-. ..r.v!.......,.c. .se,4.1r.. , 2. Source reference:"Flood Plain Information,San Jacinto River Corps of ,.., 1• •”.•••••• • .• kr ../ •I.&1 1,Ittliamtm.„4.::•,...., -,--..... . 444;a11. , :, . . . Engineers;May 1970." • • • • • •••• 4.I'•'+''-• '3 't ' ,C. •r111.;7;",'"'"1717-7.. •, ..••..,71'7,- , • 1 I• • ''k I , ;1tr* Tsl'I'r:"I'7'.l'.1.:1: ',k 4( r• -•• 1* '''"'''''I'Z''"'"''.':, .*•' ,' -.•,.... ,i!i'7'' ''''.......... ........ '..`!.`"4• I • , 1; s.......,..,•,, : • , -• •“.1•.,14...v. 1,,•,,T,... ..1;_ .:,....1., , 0.,,,...• -,1%,11 ...„..4.,47 • , it-- _.--vi '4.7.7‘..:.., . ' •: ; -, I,.ri,i. en li,p..vim p,;, ,Itl•-"l'-' 1 ••. '' '-• 1'''. •••:4:-•.!..e•1.r,v,-,..i......., :, . , -,•.••,• • ..0,./.1.,,. .;;,:,:,- . .I t-:,:•••......- '".t,S••••••••• f'•411:61"•-•••••••-,.... , • : • ...•',..•tii 4....t•.%1•4‘.9;• /. .t ',:''','•••s'4.."".4••s••••••••••• •.;:•. •"..• • 1 i• •,. , . . I t).141.7:‘,S,,. . . ,l'itl.t.3/4..6 1.‘•( '•sin::41 . ,• '111: 1.,-T... :.,•.••••71; , •• '--- ' •.• •'• * -..n... -t,• 4:1.;.•••• •4. ••• ''' •• “'• ••••• - .•• t• 1::4 ' ;%,'''.” • al •:.I • - •': !.:11'.•• ..! .. 11....V .I.11•I'••'.,...:'•I I '' :* ,••.•.',....• . i .1 ' • . f '".' 4411' ''-7.•,''.'.::, :..,7."--,-... ,l'.• ; .. i...;.;'•• '.. , c. • .• , . . ...... .. 1 r Corps of Engineers Study A report entitled pp e t Ned "Floodplain Informatio San Jacinto River (San Jacinto to Table 2 Railroad Canyon), Riverside County,Califo.nia"was prepared for Riverside Cou- nly by the United States Army Corps of Engineers,Los Angeles District,Calilor- 1 nia,and dated May 1970.Much of the information presented below was obtained 1 from this report. The report was designed to aid the Board of Supervisors and the STANDARD PROJECT FLOOD—PEAK DISCHARGES Riverside County Flood Control and Water Conservation District in solving local flooding problems and in planning for the best utilization of the land subject to Mile Above Drainage inundation.Studies made in preparing the report indicate that future floods will Stream and Location Mouth Area Discharge be greater than those which have occurred in'recent years. sq mtm, cfs The wide, flat San Jacinto and Perris Val lys are subject to extensive flooding. San Jacinto River Embankments and channels constructed byyylll levee districts,private land owners, Downstream limit of study 10.5 565 73,500 and others are incapable of containing the fl odwaters that would result front the U.S.Highway 395 14.7 531 75,000 estimated flows during a once-rrnone hundre -year storm. Martin Street 21.0 413 77,000 Davis Road 22.2 409 95,000 The Corps of Engineers tenor!defines the II od for both the intermediate and the Bridge Street 25.5 343 91,000 standard project flood.The intermediate re Tonal flood is defined as a flood hav- Upstream limit of study 33.2 262 86,000 ing an average frequency of occurrence in tit order of once-in one hundred years, although the flood may occur in any year an more than once in a year.The stan- dard project flood is defined as the largest food that can be expected from the most severe combination cf meteorological and hydrological conditions consid- Table 3 ered reasonably characteristic of the geographical region involved,excluding rare combinations. The standard project flood discharges have en extracted from Table 6 of the re SUMMARY OF MAJOR FLOODS—Stream Gage No.8 port and are referenced in Table 2 of this Ma ter Plan. Dale Peak Discharge Dama e• 9 The Corps report indicates that future flood of magnitude similar to those shown cis j in Table 2 would cause greater damage that past floods if lands within the flood- Jars. 1916 plain of the San Jacinto River were develope to a higher use than presently exists Feb 46,E t 1927 45.000(estimated) $ 00,000' Aug.in this floodplain. The analysis of the floodplain under the effects of the inter- No avail mediate regional flood indicates that the Rod would create depths of flow ran- 1931 6,000 Not available ( ging from.5 foot to 9 feet in depth within II a flooded area of the floodplain. Mar. Mar. 193938 14,000 Not available 8 I4,300 $262,000 The Corps report shows the area subject to boding wider conditions of an inter- Nov. 1965 6,310 $942,000''' mediate regional flood (once inone hundred-year flood) and under a standatd Dec. 1966 5,7201 $650,000'•' project flood. Jan. 1969 7,40 $650,000 Feb. 1969 4,080 $625,000 Floods that have occurred along the San Jac trio River together with peak dischar- ges and estimates of damages were shown in a table entitled"Summary of Major 'Price level as otnlye. ofOther flood. Floods."This table,extracted from the Corps report,is shown on Page 8 as Table '•�"Damage losses only. against datatRiverside not available. 3 of this Master Plan. "Damage claims filed against County Flood Control and Water Consevatem District. • i I e� , ! .�tom•-�_ _. •k;,.f' , �_• it s• f_� JL�i}1 S'-7{• T:�-1_I - d N O O - 7 .>. Si C L O O) .,Isue-. 1•" {.X U r i A.A..$. m _ _ . .ate Z�„, ! rj . 7 ++.ttt F �.'� ', • c - a m �f v lit s #:. 7 s' 1,111 II; ���P,;l ^t + do m ° =e E > A3 ° 1 It �'` '•.iJ ...srwr +• r. }1y" `1 f �.i V. 0 7 ^ ' • a o 0-3 "'d a'', ,---~b _y fix*rt. #'�--,„-_.1 •.t. - ,- Li4:9n 1� -1 3 O o d Ihil �-: J i"� I:.ti ♦ !. .'L f�l.. ��'+' ' , L^r�'� a: a{}. v ON 4, - �'' ' „t',+ -a}._±▪ •.k`• •yt /J'i-., ; J.• `3' 4p13 •".;,7 e Y. 'm =o c = - - r, 3 =v '�,.'.` • ti- W,!- -(' ...t �• �1.et• -3 N JO : .O a = _- • ._ 1, '1 + 1 rt .'•�4-+$j.! 4..1�.r.a. ¢' ? + riHIFI11!I_ y a rt 7 j y�'y r. .F a • •- It /i 1 ? jT . i . -_ - , . 7,...‘,..-.r ger „ ,c,:i. '.4•44f... .1%4; ''.? a :°c5.7.=.• 2-4'—.z 7.2 71 4 1 0_ _ _ ..„ _ _ .... „„ = ..„ .--3 S c.° 7, ;77'.1,'- =-5 it 4 _.. . › s F' t -rya• • • j cC.' H Rt = IlUfi C ; � • • OOT. u:T H >• F. ;';> .• 1 j . ,...LI to "1�1. t O _ C}ii , . ty 7 . ^ • U c 'r �.1- l � YirlMt .M � ry ° LL� 9 a O � o -.. - .,. t- _ . t -. .j�3 i ilLowilmo • ( • i — _ DesignFlows __-_ I Peak Inflow From Major Tribalplea Son Jac71rla River,_Oes ne Discharge ROIIngs Figure 4 la i• cAon Ji,600 s . _- `Jocinlo Riee.of 2 3 Cranston Bridge ._A 53,500 53,500 $53.500 53_5OO .A 1• 9,fi00eh Boullela Creek B S7_2yp 37,270 157,250 5t_250 _le t_ 7,900ch Iblrero Creek C POM 0._ 37,OOO Pole Id •17,800 cis Perris voile,' D P _--- - -- PONp OIM 51_000 POP/I) P0ND *IDo Year Frequency E e5,r50 Se,300 1 00 g,00o f' ee,250 Sg,750 22,300 a000 0 100 Year Frequency ' Column I • E•ieling Nolan I Conditions Column 2• Full Chonrrellraltpr , Ralhoad Colvin Mwy 79 to Column 3• Full Channellblion Downstream Column q• From Romano'Expressway \ 1 m e Recommended Plan . _' IF- .1\• 3actfl F" I I g '. �r • / CC —Ft' •-/i S. el , `,lLAK EW I i 1 Aq • fr .. ... r. • , / /, NUEVO Lige' i .1,54,,q-\ N J.Mra PERRIS ' \\y msu�' a•� ! ` r (b.)\ . • 11:1111, — ' SAN JACINTO ° I r Yi a` • 1 /� scelE-Noes HEMET I O 1/2 1 MreNNr t1 n 22 3 ROI . .Hruf 42.t w 1,, - . , •tSONO.° 18I e f,'i ✓ 10 ►`�.t , lr4 t `1T,'- J. , : or br . r,: ;". a et ; a r 4•' �. -. . ,r ' =arc �1 . 4,,,...,...,,,., , • . /� .'•�.- Z� i r f ti.. ` 1 lei�J Wi Y`iiriowssixx . �.': 'mod �- fi "n� _1 - _ _ _--_,,e4.773,--k,••1.n. • —1,74:-iit:W.Zi.,*.i.,-r; ,-:-;'' ,:ii?:'''' -ik-,7;:-. _She . -.....2 ,,-„.:- • F 2Y 1 ti V - �9 7 ♦ r1•�_ u' Jr . �'... b: t `Z T N 'k ?:.o.; Q:MRP ♦ - �' 1a ( • yr • .,........,.. .• , , ..., ,, • _ .... , ..,,„;,;,,,&„„•,..,...,:4„,... ‘,„., :,:, ..F,,,....1-,1"....'-, :,....,.,••r4....,.. ,,,IN•-,,,,_ , ... ... - ACI.,...„,,,,,4,4 i,.- ` "f ~. si` 1Nr �' x }' !� ?`w' s �. r �,=I J n 7 4 -'� • _i r:kri-� i-, y d�«. are - _ 7`t. `'� ' '�}\ _,..,_,I...,, s 1 M 4.^� .. :H if - I ,.'4 \1 ''t'1 ' .' u 41.j_`. VT, I / I ,,, . w s s K}i.•\ I r�w 2,, _ __. N'£•}� r' x• ,--- �,'4'�i'i'--ii -t '>€ �.* .),, .;+A4 r �� •`1. 7 1 -�y y,X `, �. .1t• 1 � ,�n.f ►�}g '3 7s A:::. '� �R' Mgt � 7,N e•. =L_' � I Y 4 ti:�r 1 }I 1r •' ° 'a W� J VM.r..'. l ,;$ -' Y--I --- . . _`�cv_ l_ y1 , r2-, wl n r"aY s.,- - . wg4a; _ ...::...i..-k,-1.;.IF.$i7.':',;-,:-. ,..,14..,-,I...f.:4,rt.•°.:', -.7,7- ''- '.':'--1.::' Xl '5\ 1 7/1'4: 7'; -•, ' ,;- l'i',,,,I'x. i� l.M A"i , � �..�. '4 .:>j ' ,�R `�•i_ a� ~�� ,"}. , '1 ., Y ,. -' " *"1 0 ..y ' "I „ - 1 ".fa, _wig` ttitur .,ir 1 Lis; ` l* r , y r r Q� u--^ 1 wt ..'P _ "�Y `',Ls.'_t w ! a a? '' .0 ram . ,r 1 •'� p • '16 • �i l�u r�^,9M•f t:..a':Mxa��•�_RYaO, ' . i4 , .� - � • I 44.21 _�_I �' ! �, I "41 fl ce' i' .�. t ic, 2 I , b I, j II i S ', h4 1, U , s;t'� ;• 1 -; `ate • ... ld. �' 4 � Y�.•,. ( ,� 1 — ' \s)L..--kv �oJ tir o.,:, ....ki. ,. E...,:f.r-"• .t-..:',4g4,, ...,„:!,--,,...;:t...........,..i.:,,,.......:'.• � �Y i $ %i`Ii a a ::i ni r-.4.4 ., , .r• i- 1\ W :rf-,7"'A-,_*„. ..Rt.b- _J., 7"11114- i'7-1.10,4,...- _.,,,,k-.------.:: •<.„,..---1:-',,,,iii''''',:::',....4:::: :,:..i..:.;"',„7_",,-"T-'l''''.;t1141,4,,- - 01,7,- '*..-4k.---';',,.... :,-,--. :ft,'`„;Y'***35P1(-:-.;--s.75.1, jam +i 1.. _. ' Y of.\• - .• t , {� SA. hr.: '.'� /� tea 4 - - - - Mr ur - - sr s my , / Public Works, Utilities, and Transport tion Considerations ` • U.S. Highway 395 located in the Perris Valle portion of the study area has been and Sanderson Avenue will be an im prtant ink between constructed higher than existing ground so that during floods of low magnitude, and the transportation system in the south ernth-part of outh IRiverside and SansD Diego this highway facility will remain in service. There are a number of drainage strut- Counties.The extension of Highway 79 along the route of Sanderson Avenue and tures under Highway 395 which allow normjrl floodwaters generated from both the designation of Sanderson Avenue as a state highway are being considered,as the San Jacinto River basin and the Perris Valley to flow underneath the roadway. well as the need to provide an all-weather crossing of this proposed state highway However,during storms of substantial magnitude,Highway 395 will be underwat- over the San Jacinto River. er. During a once-in-one hundred-year storm Highway 395 at the San Jacinto Riv- er crossing will be flooded to a depth of between 6 feet and 6.5 feet. Gilman Hot Springs Bridge crossing the San Jacinto River near the u 1 the study area is an important transportation link between the Hemet San Jacinto i Some sections of the highway at the San Jacinto River crossing are lower than the area and the metropolitan areas of Riverside and San Bernardino. While this drainage structures, thereby allowing floodwaters which are greater than the cepa- bridge has withstood the effects of major storms in the past,it will be inoperable city of the drainage facilities to drain across the surface of the highway. during a once-in one hundred year storm. Gilman Hot Springs, Soboba Hot I Springs,Soboba Indian Reservation,a number of ranches in this vicinity,and the 1 The Ramona Expressway crosses the San Jacinto River just west of the commun- 1 to ity of Lakeview. The County expressway wal constructed over drainage facilities such aa storrne Metropolitan Water District's aqueduct will all be isolated during . designed to permit a flow of approximately 10,000 cfs. Flows generated by a once in-one hundred year storm will pond to a depth of 2 5 feet over the surface Major pipelines originating at the Metropolitan Water District's cross the of the Ramona Expressway where the expressway crosses the San Jacinto River. San Jacinto River at the Gilman Hot Springs Bridge.Major pipelinestolf both the State Highway 79 and Sanderson Avenue connect Interstate 5 at the Cit of Beau- Metropolitan Water District and the San Diego County Water Authority cross the I mont with the Hemet-San Jacinto Valley and areas to the south of the Hemet-San San Jacinto River just downstream from the Ramona Expressway. Jacinto area.At the present time Sanderson Avenue is constructed along the river A number of County-maintained roads such as Goetz Road,Murrieta Road,Case ' bottom of the San Jacinto River where it crosses the river.Sanderson Avenue is Road,San Jacinto Avenue,Nuevo Road,Bridge Street, Davis Road,and Record frequently impassable as the result of runoff from minor storms along the San Ja- Road would be inundated in a once in-one hundred-year storm.Drainage facilities cinto River and by minor storms affecting thel Potrero Creek. along the San Jacinto River at these road crossings vary from culverts of small and Transportation indicates that Hi hwe 79 limited capacity to bridges of 6,000 to 10,000 cfs potential capacity,provided ad- The State of California Department of Trans \ 9 V equate inlet and outlet channels are constructed. • [[/I1 • I , d 1 4 �N • ,1 ( \ :41 • 14.4.4`'1.-----4 12 , I' . _ C ^ III U1I jilli: N.N '� > c = E 'c� 0 ; m c m m y, -C O N C N`C .n m m Y U O C m ^ y N >'H CP = _um� Nm ; you. ^_ae 0 c Ix at met -1p, '-07, = ,� d $ c7 000 - ,d= O m E w E d m a =va ..m o m c c i..c -2= 3 An p.c N > ` N A u y O m m C 7 u d > • O 15_ O u m v2i ,', C C > . I C C > .q G,y ` �� N c d c F.O wy o= a 2 d° , `= 0, E �o >t >o c,no V/ O O o N E > 0 rn m m w m '" m 0— LA n >L C 7 >> Cf '� > ,TA .. 'pi-um C y ` >. _ to to to E' E a -O_ N d ` �: : d O m � I 3dE- P.- T, a�� E °'v � 0 a, EmmoE =.me w 2d _ c � �m:+ cm G E .0~ Oy `r ,.„ AO > 8 0 t 0 7.,_ ;a � SlE�= ?iO ill 4 .r �i x O E.•�, >= 'C 2 U co C'4 tea' 23; o,G•c 8 c gni 0 id =� .8 -gym N +'' 76.._ o'=A �+IJ�,p 1O E. a`' o�.: /��IIII ` .' , 'c - 3 m �cv `m= m c' N•- ., o c c C� - r`a'o m a c /L cn 2 N 3 Q s a' m .E-m'(j o i_::„. , .-am` -it-,:w'—ttf+•. '7C. "r .-.Zv�••z"i._ ; r • —^Fa+�F,•.' '. \a} _ ate 1 • 'fir ,y+� _ •?" ;t 1T . . ..► _ • ' ..tA` r; g'YPY' ,.fb,r zy,' __-. t"1 °S y¢Y.�'T�4 4 ►J ;• . trit • DIMEEVIII = aT._ ~ jut. t. t� • }474(14, `— `~ ";ass * •S !?jf -S ,r - _ • ' may 1c - ~. t'— ' `' 0• 1,1 • -... R_ +-• - .r.r '.- • tl _ � \ : � '- kit '? i q:.t , f eft j J f . Ili;la� `I.• Ig-,. ;;t=-- f j,II -.'' rii _ _ `, • may. L• y \ f- ! 4? 'a "Cww-; .... .�+..� .•-M 3y"'^-:tom. '�.L-'.r p%�+, r"`{•.+ s r.=-+7}:�.:--.r�•4'�. • - 1 ; T ~' "_ y 1e;. ..;3 . ii �osr 'r�. ' !_ -• ''qit . ��� E'er ''' ' ,J sY" ems, 4 >r'_ 'r..iG.. 1 'T. 1 xr ...T-1-;L1-.:711-?:..-...1.';,1 z'.3.'.'...-:...::_;i::_.-,L....'..r-:.'.'--...:...•.-'-.°.::'•.:-4..,.:.._':-`._:-1:-,,-..-.i'-..—7:..%--.1..7--A'::.•'..-....•,-...•...\ t• t .ate-'SAL , 1 `?e. -. + T it - j r. t . .4'{`T l i _%"*"ff j V t! ;1' ' �t '1 4 •r• s._"t'i '.' ice - • r 1 �'' s t!r . j� T' _ • L v r :53'w T .. • �r j i v°vZ�l .i. ",� 1,y,()j)r�.# "� `it _' ` 4-- I -- 11 ! 1 7 ti' In` '. . l L5'L,',{' r1•1. 4 y O'5L v A p m >.` _ R.r it E m `a E E ` ?' E u m 8766 d.>_ $'N 22, co.-3 O+C N� v j _.? R •O X R7. 'C - ` ; o a¢ c = m CA R O v• _ „•O.0 R > > 2. 01 __ 13 _ _ Q 2 g - 3 =_ c O m q _ o R p c C.) o=• m N ''- _� ¢ 3 _� 32 R _ Q m ti, • r = m 3 y c O a,= m '''',,,TA, c c c= --yT.2 O u " w` C) o c y a E E > c d caw � 2=g8 c cc m = E N", y=¢ y ° o o Q_ t b y c-E v o „ ` c` E o o mo _ > Ec= c 0- c R y A 3= c ^'u E �- m-5 m =fi o� c •a u r. > o o m' W 43 c m L= _�^ u 7 i,t ` „, O al'M.N C O ' c a' 2^ 7 -c • '` cEa d'x >3E ` E ^c o-g m R : c E 3 it °a ` c o- X ^ _ pp� 1 =w = 1 C g �.0. T° v cR, v ', 0 [O v 7' =i > a = pC' C - 'v ='3 m i.r - O._ ., y R R 7 ° = v ^ -0 = E°1 23 0 6 o Z O - . .5 25 CA �77R >o >>^ >- - - Ry v . a= u 0 v) 305 ,nti uC= ° 1 y h m- n R I / Evaluation of Alternatives Alternative 1 This alternative involved the construction of dams across the San Jacinto River Possible sites for the construction or an earthfill dam were studied in the field. and its major tributaries to reduce flood flows within the study area.Previous Preliminary geologic review and recdnnaissance found the sites for the earthf ill studies were made by the Corps of Engineers, Riverside County Flood Control dam to be unsuitable because of unstable soil conditions. Faulting in the imme- and Water Conservation District, and Lake Hemet Municipal Water District to diate vicinity of the dam site also added additional high risk to the construction determine the feasibility of constructing dams on major tributaries of the San of an earthfill dam. Jacinto River and across the San Jacinto River itself.The Lake Hemet Municipal Water District study indicated that a dam across the north fork of the San Jacinto Hydrologic studies indicated that the control of the once-in-one.hundred-year River would cost in excess of$5 million.The high construction cost of building flood flows from Potrero Creek did hot materially reduce the flood flows along such dams, when this cost was related to the volume of storm water retained the San Jacinto River.The peak flow from Potrero Creek did not coincide with behind the dams, was found to provide little benefit in reducing storm flows in the peak flow from the San Jacinto River at the confluence of the river and the study area. Potrero Creek, and the Potrero Creek watershed is much smaller than the San Jacinto watershed. Because of the steep topography in the major tributaries of the San Jacinto River, small storage capacity and excessively high dams resulted.The small storage ca- Further hydrologic investigation indicated that allowing the once-in-one-hundred. pacity resulted in a very slight reduction in flood flows from these tributaries and, year flood flows from Potrero Creek,to enter the San Jacinto River would have l therefore,would not make a significant reduction in the San Jacinto River flood the effect of raising the water surface upstream from the Ramona Expressway by flows. only six inches as compared to the flows along the San Jacinto River,not includ- ing the Potrero Creek flows.Costs of acquiring rights-of-way along Potrero Creek In addition to these problems, the majority of the sites were located in a very for the construction of an earthfill dam and the construction and maintenance of active seismic area and were crossed by several major active faults.Active faulting this dam, when compared with the Construction of roadway embankment along made site selection for these earthfill dams a difficult and costly problem. the Ramona Expressway favor the construction of the roadway embankment.The second advantage of the dam construction,the debris control,still remained to be The difficult terrain,seismic risks,poor accessibility for debris removal,and gen- solved and will be discussed with other alternatives. eral operation and maintenance costs,as well as the fact that major levees along the upper San Jacinto River have already been constructed by the Corps of Alternative 3 Engineers,discouraged further detailed study of feasibility and cost effectiveness of dam construction. This alternative involved the full channelization of the San Jacinto River within the study area so that the channel]will contain the once-in-one-hundred-year Alternative 2 storm flow. Hydrologic studies along the San Jacinto River were used to deter- mine flood flows from the effects,of the once-in-one-hundred-year storm at This alternative involved the placement of an earthfill dam across Potrero Creek various points along the San Jacinto River within the study area.These flows are above Massacre Canyon to reduce flood flows in the San Jacinto River. The as follows: benefits to be achieved by the reduction of flood flows and debris entering the I San Jacinto River from this major tributary were investigated. I 1. 4 San Jacinto River,Corps Levee T Potrero Creek:53,500 cfs. This earthf ill dam would cause a substantial reduction in the peak flows being 2. San Jacinto River,Potrero Creekllto Ramona Expressway:58,500 cfs. discharged from Potrero Creek during a once in one hundred-year flood.Collected waters would be released at times when the San Jacinto River would not be at a 3. San Jacinto River,intersection with Ramona Expressway:58,500 cfs. flood peak.The once in one-hundred-year flood flow from Potrero Creek is esti- I i mated to be 7,400 cfs. 4. San Jacinto River,intersection With Highway 395:58,750 cfs. In addition to these flood flows, the debris that has historically accompanied 5. San Jacinto River at the entrant I of Railroad Canyon:58,750 cfs. flood flows from this tributary and has clogged the Potrero Creek channel,the QI bridge crossing at Potrero Creek along Highway 79, and the San Jacinto River The alternative of full channelization has the advantage of full river control within channel would be materially reduced.Debris would be retained behind the earth- the study area,but such control would discharge far greater quantities of storm fill dam and removed at convenient times by routine maintenance. The down- flow at Railroad Canyon Reservoir than has historically been experienced.The stream portions of Potrero Creek below the earthfill darn would have flows small effect of the additional inflow of storm water would result in an increase in the enough to permit control of the creek without major cost. maximum water surface of Railroad Canyon Reservoir to an elevation of 1,399.4 15 t tt w` .� fit . • rr, • l r feet. This water surface elevation would be higher than the allowable water srrr• • ' r tirt face elevation of 1,397.5 feel set bythe Riverside CountyFlood Control -' ..t.�:::n-- ..�.�....� �. .t>r=vs`c..s:.: " u f.� rrl -- and ~ .• -- w r]��1 ,..._. , Wafer Conservation District at the time the area developed.Major flood channels .;�=1^`r^•:-1 �ar�, � ; �°jam". -a .•y t would be required in the Railroad Canyon area;and,because of the rocky-terrain, Tom. ��_ _ ' t extremely high construction costs would be encountered in ing'to con ,, — �•+ ' 4 • f t, �. - struct a channel of sufficient width and depth to achieve the channel capacity � ti�•}f�i' 1 ,, L i l t required to accommodate the high flood flows. Severe alteration of the terrain 1 M a 'C �i ;.—.4 , f t r 1 t t!11� wer', _. Nh i r i- 1.. I 1 . t_ i�f "} {�i e r,. t; rli.ni l,14j#f within Railroad Canyon would have to take place to construct the channel re. i 6d tt" , 1{ 1 ,Y • (erred to above.This construction would result in major environmental damage to •rE�` rl`5r• ,• ,r 3 t r .{'E. n? #I. �iF • 5 .;.. ..,- .. Railroad Canyon. 4�4�'�'d l +. t •' a 1 i !> " c With this high inflow of storm waters to Railroad Canyon, the capacity of Rail- ;' ' I � 4 ' i tat ' +" " � ' 9 14 ai*., ( j '� y , / road Canyon Reservoir could be exceeded and could,C 1 �� a .-i 11 l pose a threat to areas below 1t .,fix I - • I 4z ) and downstream from Railroad Canyon Dam.For the above reasons,full channel. j''..T� • s..._,4 , ' i k{.4 , f ization was not considered furllter. LL F J ^t.f t .,11. ,.r t ram." e , ikt '�' .. ,,IlL lii'IV ' v t f r $,t, . tit14i9T br•r r Alternative 4 `` 1 tt rx t J Itjrir- j ; }Z1 rrt l' .� tl1 This alternative considered full channelization of the San Jacinto River within the '� '� r , . {+t t4 rt e r; z.. studyarea and studied the continued use of a natural low area called the Lake- !! ' '-�'fi' i f �•itr',I' ) `rzi •`x ."—, view pondingarea as an area for ! Y it i{{,t ,,i,, 1 i a Y }�Fj F R� .,,i,pt,,? temporary ponding of floodwaters so that the r } peak discharges i 1 t;ltt ! • .i r '. x , , ..••, i,�- - from the once in-one-hundred-year storm flows downstream from t rice s. the Ramona Expressway would be reduced. t 7 3t 14 4111. ,1•1 ., • . i t•`. t-4- �t 1 II .'; j• Occasional pondin in the Lakeview ponding area has occurred for many 7 �]jl years. "'t .�?tti, ;ft"(t.�,��„e,s )�„i-�,.., USA:of this pondingarea as a means of controlling the peak flood flows along the 2'i a'���)rr t t.rrr F !! ' t , I 3 1 I San Jacinto River downstream from the Ramona Expressway was considered to pe and size ' i r f. :��Cr� ?: +F4 t 1 ,jj `(s 4• . I a,t 4 1; , ) , (: ., ij see whether or not this p nding area could materially decrease the t ry x' , {�i, ! I` t. tl ) ' t. i� f of levees, channels, drai Qge structures,highway and railroad bridge reconsruc- tifVA ��,i�17• 1 :i� / #'.:1 rl !�l.t. i ;.,1' . il{ i'',l , ,, ' � .' nb • t k"j. • {1 �(}rf , i C lion,and project construction cost. 't .t�.,�vtv,5 �1�� � 91� 1 f -, c_ F+. ?�7� •3!{,t ' i;y ��.� YY �' jNt'•' " i' j .. 1, i ct ..1 11 4.f: In consideringthe use of i _ e arlati111 : this ponding area, three criteria were established as I. t�f ti i -,r �t r rsi F '(ttl�l � r�a�'� follows: • ,� 4 frt 1s ,t t -r•,R 71 i : ,: �� Al. 7'. ....' 'r� �u 6ri to r-j�r�aex� C 1. The maximum water surface elevation of the temporary pondin r v; ' ,t,. ,,L t � t 1. r '-4 'r i.r.►- g area was to l ,7. -.Z.!! Jf.:• ; , be established at an elevation no hi ter than the water surface elevation r y 'I �r..c+}r!g. rfr:;; �ti,i caused by the once-in one-hundred-year flood under existing conditions of 'rs" R ,fy � „r, s: s• r{ the river within the study area. . :7-2, .pia +'., .J�l ',..4 . /.I r. its°. - T' i'T 2. No inundation of the L. ' — ' " � ' '� sy- .^+y�y.._ ' ' _ Ramona Expressway was to be permitted. i. .?". �dt�8 -� • _- � `414 3. Improved ability to the area.,,yam drain s,~5...- •• -.fi r ._ r r'i' %f;'..'r ;; r: zw�., i'.•..�' ' �+-:.G.+...'"... t, To achieve these criteria, two options were considered.One involved the consid- eration of a control structure along the San Jacinto River upstream from Davis j ..q+,;� +u. -"� - '•t Road. This alternative was abandoned because of unsuitable geologic conditions a- .r ;;yu ,,r „�, - •. in and around the sites studied.The second consideration involved the construc- ••,?,ea,myr , '• - x�::`"—�• lion of the westbound lanes of the Ramona Ex resswa in the vicinity of the • crossing of the expressway and the San Jacinto River. The elevation of the tin- :"' K�` r i.'i t ti 1 ,t,•_ fished roadway was set so that the roadway would not be inundated.The roadway ���N. , ; +� —! , *ter- • elevation was determined to be 1,432.0 feet above mean sea level.This elevation ,f • ..A* ii p:R�"��.+i �'f •{. ��t' , " was determined to be approximately 2 feet higher than the maximum water x ` r •• .• • ' �; r •ti_A 0,.-, ;. swtace elevation of the temporary pond that would form from the effects of a u once inin one liuiidred year storm(low. .4.11,1101;„ - . I V { " x-a .r,, i• 1• :t d I r6 1rJi f l , ` 1i,: j,1 jj r 1 .'�,. I t..'� , .r �1'� ('�1"� !Y .I,+�J�'{I j. yt'f}+ tlk9�� t�'°?���sf. �t'�jt+' ,. t ��y r 11. , t HIP'.✓, x t+r rc i; ,,,o.,,,,,i,..;:quil, 34 ii t•.. M E' 7 1� This alternative further considered construction of channels,levees,and drainage i f.I } a F 1 i' rr'Flll re''1 t ,t"- rg.tj' ' f t r a i 11 'op ,t1i11r^�•', Y}!1" facilities downstream from Ramona Expressway to Railroad Canyon wills cape- ••I- a ,•j'fir.`J-fir,••,i r• , 1'. I f t tt� ... 1s, r,'-' tt ` r l ttS ar i 't f r tir3 1 7 tPtt , , iJr At q4 Ili •! 1 • . {�! , clsies planned to meet a variety of release rates which ranged from zero to 20,000 r ^,t `. i 4.. •► }+ r , •,, ` - tkli •,y f t l` 4,r� r s ! <• II The minimum outflow from the Lakeview ponding area that will meet the criteria q, r-t �l� • • S ` �a`*i"t :h ? 1;,?+ '�At ., 4��ir.i ' referred to above was determined to be 6,000 cfs.The maximum outflow from •+ ••. ,V.rit•v t t. .•"t te" - � t4•.3.44->:. the Lakeview pondingarea that does not begin to increase significantly the design s''"'''''""7,r,1'I "PI I. �' 1 r� ►�.,��+t� raG, +-- k' w• �• 9 9 Y 9 f_ �tpyxr)lit arlllri�YD + discharge requirements for the reach of channel downstream from the confluence '` ?7� ' _ - : ;� r ill of the San Jacinto River and the Perris Valley Storm Drain was determined to be J + .4'�?I y, '�- „.,_ �.`t r 1� 20,00i cfs. y r�Y'.� �i I '.r �< =i �L•,r "`w+"' �' -' . M When the minimum and maximum outflows were compared with estimated con .r r yrs-* I' y '-� — 1 , struction costs for controlling these flows between Ramona Expressway and High- +:;. -,,,:c ....:•^ ;:!' !• '°Y '� �'►,� way 395, the minimum outflow of 6,000 cfs was selected;and a channel was • r'��.+�'' '• '.-, w-r_ -.-- planned to accommodate this outflow. 40, ' t t.,•,i••rI j {ifsr-- f ill 1;;;i5 i This alternative substantially reduced peak flows downstream from the Ramona • • I-_- • ,. , ,ir f ttC11G Expressway. When the full flow from the once-in-one hundred-year flow in the '„��t ir..::.�• ni . • w 1�f. ��i`,,� IIPerris Valley Storm Drain and the 6,000 cfs in the San Jacinto River at Highway 4p•�! :•-i,- "• � ti tti ;�• `' 1'1i {giv4.M •t tr'.395 were combined, the channel capacity downstream from Highway 395 was y'r,It• 1 ( ••0 , ,�L 1 Y v4. }:• f al22,500 c'. Ligi1'14 =.• •1:�• r.': ' f 'RT � 1 I.;+i 1' F;,1'IA t?'r.t'�•y�t ,' 1 il This alternative would have required a channel with a bottom width of 450 feet w ' 11' i ,;1-9W�*i :: ' r ,y '� • � t r; c v •. t i q pp y and an average depth of 12 feet, would have required a new bridge crossing at j t.,w 1l41#`±aw s: 'e 1 - 1%,."''% ,4;44�.! ' '.,III i ' J. rl a. .• ',.. •• ••6,1, t;. Leh • $.:1�t�.4. Highway 395,would have required l new bridge rate the crossing of the Atchison, i1. . - tt.4_..,h. a Topeka and Santa Fe Railway,would have required dip sections at Goetz Road and Case Road,and would have required a major sized channel through Railroad ' " PI lCanyon that involved major rock excavation, environmental damage, and con- - struct ion costs in excess of any presently conceivable benefits. I, i The channel capacity of 22,500 cfs through Perris Valleyaril Railroad Canyon i' P Y 9 •` r.4i.'l _ �.-r, it'�:A� ,. r a_,.: -.?Ali-. a ._ii would have severed county road systems between Perris and Sun City and would � have made severe environmental alterations because of the length and width of .ate.i �„...' ',.', 'i• 'i• wya ig�t -i1.•t'r. �(�;l_ �a -•• '• *t* !;•� { the channel required in Railroad Canyon. The cost of these channels between I, �,, 1,�.�tl's!'�..;�J 1 "*"" �%'*�+'R ' '£ Highway 395 and Railroad Canyon was estimated to be in excess of$8 million. r _ .... t•, _, 14 For these reasons the alternative of leaving a pond immediately upstream from r- the intersection of the San Jacinto River,Perris Valley Storm Drain,and Ilighway ' _ ` , ~ r 3 �- _ - --�••--_ I...4r.r`.�' 395 was considered and will be discussed in detail in other alternatives. ., ' • -j - ._r"nt. ,:j' i' * ` .-,,,r ,~ u"�y .�T _.:.1x. .. Sri• 3. :P�'J. r. ,14 .L•..-,a„ q . , t t.. -1- ye,. y Wit. �� Alternatives i„1 '�� •:ti �w�rrls:-s.; }r ���tr" This alternative involved the full channelization of the San Jacinto River within 'ems'" } "*"' -:'``�` r-irs : • -.I.-, � the upstream portions of the study area and continued using the Lakeview pond- �,-�ir�.''� ;:.flit+--' .,�_�-r�- =i'f� w 41. r i ing area for temporary ponding of the once-inonehundred-year flood flows; '*"�' ".'A=�,�, rr: • f' _- .,.-,, j � "s' controlled floodwaters downsueam from the Ramona Expressway in levees and G if ••:,-... -,'�: .-� channels throw h the Lakeview, Nuevo,Perris Valley,and Railroad Canyon areas; k�.- eL � '�gji _ ts�3 :.. 9 �It,: and allowed a temporary pond upstream from Highway 395 at the confluence of r„��,`�'' ��±ar_�7� ;X',«' lt'.y,-xr'•i•-• +r''•.:.•r� • the San Jacinto River and the Perris Valley Storm Drain. — -,..:y"�.1.- Jp'�'- �'q�� � , This alternative reduced the channel capacity downstream from Highway 395 by , • '-r ^'• • a iiiivioils allowing temporary ponding to remain in the area immediately upstream (torn fJ ,. -.?'•'..-.0 ctr;► ~y--.� /•;' '� s r' 4-•- -:''e:wt .�JjA j • a ter•' r Cr'ram- y - e. l n 7 . awl Highway 395 at the intersection of the S�n Jacinto River and the Perris Valley provements recently constructed adjacent to Highway 79, would have required \ ' Storm Drain. The temporary pond upstream from Highway 395 would substan- major alterations of the highway bridge on Highway 79,would have resulted in a (tally reduce the floodplain that now exists'and would allow the construction of a much longer highway(ridge at Sanderson Avenue,and would have resulted in the channel along the San Jacinto River downstream from Highway 395 with a cape- removal of a number of duck ponds and reservoirs downstream from Sanderson city of 6,000 cfs. This channel capacity allowed the use of existing drainage Avenue. facilities under Highway 395;permitted uselof the existing railroad crossing of the .ii Atchison,Topeka and Santa Fe Railway with minor alteration;maintained exist- . Alternative 7 ing drainage facilities at Goetz Road and Case Road without major alteration; reduced the size and length of the channel through Railroad Canyon;and in most This alternative involved the "do nothing" concept and generally discussed the cases downstream from Highway 395 rendered the adjoining land free from flood- possibility of leaving the river in its existing condition without further control. ing from the San Jacinto River. Local side drainage will still remain a problem in this area but will become manageable once t the floodplains of the river, interruption in major highway transportation,and major flood flows are removed. Major flood devastation,reduction in use of agricultural lands,crop damage along The disadvantages to use of this alternativ were the need to abandon the 22,500 severe restriction to the health and welfare of residents in the area will result from cfs capacity channel downstream from Highway 395, to compromise the cons- use of this alternative.A five- to ten-year frequency flood flow will cause these plete elimination of flooded areas within the lower portion of the San Jacinto conditions. River Basin, and to permit a ponding areal immediately upstream from Highway 395 and the San Jacinto River. I Several natural features in the route study made the"do nothing"concept useful. 1 Alternative No. 5 discussed the continued use of an area upstream from Highway Alternative 6 1 395 and the Perris Valley Storm Drain for ponding storm runoff during severe This alternative combined features of Altel natives 4 and 5,but the discussion is flooding conditions. confined to the major options explored in the upper reaches of the project.The In the areas upstream from the Ramona Expressway in the area of the Lakeview major change studied in this alternative wa in the portion of the channel between ponding area,Alternatives 4 and 5 suggested that the low elevation of the terrain Highway 79(Gilman Hot Springs Bridge)a id Sanderson Avenue.The San Jacinto as it exists would permit temporary p y ponding in this area under existing condi- River within this portion of the study aree does not lie at the topographical low tions.Severe faulting and widespread surface cracking due to seismic activity and I point of the adjacent terrain.The possibility of moving the channel southerly of settlement made major levee construction and dam construction within this area its present location so that it would be I ated in the topographical low point of impractical. The use of this natural reservoir for temporary o� ( y ponding condition and ldw not ld� the terrain was studied.Considerable additional rights-of-way would be required reduce the I i to utilize the topographic low.This alternative would require construction of new potential land use in the area nor worsen the condition would levees along both sides of the new river channel. continue to provide habitat for wildlife and waterfowl in wet weather conditions. • I Connection of this re-routed channel to the downstream end of the Corps of Upstream from Highway 79 where the highway crosses the San Jacinto River, Engineers levee, the existing wire and rail levees provide some degree of protection from moderate g possible devastation in major floods of the new San Jacinto storms. These existing levees would no doubt fail if river flows approach the River Park constructed during the bast year by the Riverside County Parks De- 7,500 cfs range which is about the ten-year storm frequency.If major works were ' partment, and the need for major alteration of the bridge along Highway 79 constructed in this area, it would be necessary to widen the river channel to join • crossing the San Jacinto River were major'problems considered in the use of this the Corps of Engineers levee in such a manner as to provide a channel width of alternative. At the westerly end of this section the study indicated the need for approximately 1,100 lees. Reconstruction of the Highway 79 bridge(Gilman Hot t construction of a major bridge at the Sanderson Avenue crossing. lit would be Springs Bridge)would be required.Extension of the existing bridge and alignment necessary to return flood flows from the new channel to the existing river best by would necessitate an expensive structure which would not cross the river channel i altering the alignment of the channel to the northwest to meet the existing river at right angles. If this levee construction and bridge extension were not accom- at a point less than one mile downstreaM from the present Sanderson Avenue plished and the existing conditions were allowed to remain,severance of Highway crossing.The vertical and horizontal alignment and the hydraulics of this channel 79 dire to flood flows could continue to be anticipated;and at the same time,the presented serious problems.The primary factor considered in selecting this align- southerly approach to the bridge would be washed away. • ment for study was the improved predictability of the flows that such a shift away from th Massacre Canyon debris coneprovide. 9 wouldSince the mobile home park located adjacent to Highway 79 along the south bank of the San Jacinto River has been constructed to elevations that would place it In addition to these factors, this alignmenk reduces the water surface elevation of above the water surface elevation of the once-in-one-hundred year storm,protec- backwater flood flows that can inundate the golf course,recreation facilities,and tion from flooding of these facilities has already been achieved.Therefore,use of resort at Massacre Canyon. i the"do nothing"concept for this short portion of the San Jacinto River channel appears to be the utmost feasible.' This alternative was not further considered)in the study area between Highway 79 and Sanderson Avenue because it required the acquisition of considerable addi- tional rights-of-way, would have causes flooding and removal of some park im- I ` r 18 • 1- Alternative 8 -this alternative considered combining certain desirable features of Alternatives 4,5,6, and 7 to provide a plan for the control and channelization of portions of the San Jacinto River within the study area from the effects of the once-in-one-hundred year flood flows. • The Plan has been divided into five separate reaches.These reaches are as follows: 1. Railroad Canyon to Highway 395 2. Highway 395 3. Nuevo(Highway 395 to Ramona Expressway) 4. Ramona Expressway 5. Lamb Canyon to Highway 79 The Plan for the Railroad Canyon to Highway 395 reach was described in Alternative No. 5. This alternative provided for the construction of a 6,000 cfs channel from Highway 395 downstream and along the San Jacinto River through the southerly portions of Perris Valley into Railroad Canyon.A low flow channel was constructed from the stream gaging . station southerly about 0.3 miles. Modification of the trestle at the Atchison,Topeka and Santa Fe Railway crossing was planned. Maintenance of the existing Case Road and Goetz Road bridges allows these - crossings to be used under once-In-one-hundred-year flood flows. Construction of certain features at Highway 395 to avoid ponding over the highway was planned.These features involved the construction of a collector levee and channel along the easterly shoulder of the highway to collect floodwaters from the Perris Valley Storm Drain and the San Jacinto River.The drainage facilities will be modified to allow 6,000 I cfs to flow underneath the highway. In the Nuevo reach(Highway 395 to Ramona Expressway),flood flows will be carried in a trapezoidal channel section 35 feet wide at the bottom and about 12 feet deep.This channel will extend upstream to Nuevo Road and then transition into a channel 95 feet wide.The 95-foot section will extend upstream to a point .5 mile downstream from the Metropolitan Water District facilities.The channel will then change into a 200-foot wide section which extends upstream to the Ramona Expressway. I Upstream from Ramona Expressway no improvements were contemplated between the .i- Ramona Expressway and Lamb Canyon. In this section the"do nothing"concept was 4 discussed in Alternative No.7. .... t i In the Lamb Canyon to Highway 79 reach this plan proposes the construction of a new ' levee beginning g ng at Highway 79 and extending westerly to a point about.75 mile west of p� } i Sanderson Avenue.Sanderson Avenue will be realigned to reduce the length of the bridge 9 ( ' over the San Jacinto River. The realignment of Sanderson Avenue,the construction of V I d this highway on a roadway fill,and the protection of the upstream side of the highway embankment exposed to flows from Potrero Creek by rip-rap or other erosion control systems,allow Potrero Creek to flow into the San Jacinto River and permit major debris v jil 1 awcatchment upstream from the intersection of Potrero Creek and the San Jacinto River. , I The proposed use of the Massacre Canyon debris cone as a natural debris catchment area , ,a k is largely a"do nothing"plan.In the reach between Highway 79 and the downstream end _ tz __ � • i of the Corps of Engineers levee,the"do nothing"concept as discussed in Alternative 7 is proposed. \ 19 o I o1 5. An ungated but controlled outflow at the Lakeview ponding area by the Selected River ContP construction of an additional two lanes of the Ramona Expressway. I The previous section entitled"Evaluation of Alternatives"led to the selection of II 6. Construction of box culverts underneath the additional Ramona Expressway Alternative No. 8 as being the most desirable. It combined characteristics of the lanes for discharge of 6,000 cfs downstream from the Ramona Expressway. other seven alternatives and is the recommended plan. The plan included the following specific provisions: 7. Construction of a low flow channel to accommodate 6,000 cfs from the I Ramona Expressway to Nuevo Road and 4,200 cis boat Nuevo Road to 1. Full channelization of the San Jacinto River in the section of the river Highway 395. between Highway 79 and 1 mile westerly of Sanderson Avenue. 8. Continued temp orary ponding of floodwaters at the confluence of the San . Jacinto River and the Perris Valley Storm Drain but at maximum depths 2. A reasonable width bridge crossing at Sanderson Avenue. about 5 feet lower than can potentially occur under existing conditions. 3. Realignment of Sanderson Avenue to permit tributary flow from Potrero 9. Construction of collector levees and drainage facilities modification at High- Creek to enter the San Jacinto River without construction of a dam in way 395 to permit 6,000 cfs to flow under the bridge. Massacre Canyon. 4. Continued use of the Lakeview ponding area for temporary storage to reduce I 10 Channel construction'downstream from Highway 395 with a capacity of the there ljy'permitting the continued use of the Atchison,Topeka, peak flows downstream from the Ramona Expressway. and Santa FI Railways trestle, Case Road, and Goetz Road as all-weather. crossings. I r ' +•' r , '. ' + ' j 1 Its. ly i�rt • i , kt l'ilii .'''. ni (y [�y�t•r1I 1 _ i,t ' lf 1i A'I1 y • t i. - , •N' 1L`• 1 Ir6 1 (t+i' l 1�rkR�,C. r 3 +, '��+I FLky • �� • .� .iA.,• '- � rl•' • - ,mot, + i ! :�r s ,ii1f et tui'1�` . t {•t 'S+ - " j t cTt _ . -1•. T • ;It r rI w�i i • 7� t rl i� f y t 1 • •: 40.fr..+t '.•• ` r•/i :Ai,;`r. r I '.l. I% t%�t l)•i t U . !r, -t5 le = F 1 ,t k)t•�. i� ke'; . y: f1i 4•`1 t i Ik # r • "!r t rcY , ,. ,Ia I Z j, 11 J ,,k f+' istt ti v. �,� x y? 9f •p 414.:.. i i'1 °I • . .1 r4„wt.,, i . � , e 1 ,74 i;,1 _ ,l�`. 11t.11. Ira :{'• i4.1.-,.,:. 4016,14Lit.4.uLq.1.. ' + 1ihr.lt�'i l� elL 6 �; ft�J 1�tE ,r-. ,. T i•''V M•lyrr7 t klir•i � '' 4.,141 •'•}`•li tS r •�I :_� • • 1, . ir t ",';0,1,H ••#-'111i •.ir IVA1 1I nrt..yk.I , y •n4:0:. t I.4A,4ti M•V•' TT4 ,y--.--.�„r. Y , y `I r y z ti, ,+ .: 7�( J i• •�. i f + ::,- .1,",, tl Y 4s '- '�" -Ir`. _ t iy + 11 L I-4. ., ,&I .tnt.ifr f • 0... t,�,flail' " f,y� .,1 • . / 4,�,,.,�� j`.=r„. } - ..; Lis•J. t. ii1F•• • r;= It Adt S�{'aF $ �j t • . \lit iailW f rt�fi +7•4.•I . l+ts•+ r r �, •�;,. I• . , r1,�� r '.tf`.�• Y :r . .4-_,-- lc ,,t ,, `4 L — '-" ti - _ • t4 t f. , , 01.- 'rid :f,,,F • t T tea i. J ',} `t , 'F. •, r I.:• •\ r •- ' .: itI 1 Z i .�i'"t`9 -4 r .tf• f �.�.. .. •••,yt • , st, . ,' • 4i• `�!>r • 's 11s44 -i'nI+ t ;;t,•i+_i i•, if 1 tit k I 1tt;F‘'fi r,,j)- t 1/41 1 e rtt lily t •' t If' ,:'-a ..j,1- `•,�„�`s 'it-fit -" j1i.. i. ,1-1''',st!► 1r +:1t1?ra1?.'1il 0 •<1 1`, g r.' ! `,it ,�. `��,�'t ,. [ .f if i - �r� I•N� S 1 17 r r.a i J 1tY: ++p . }ate, n.• f,t 1 Ce ,. ..;:'`S '';it' .-r ` f ;'•kt '`• �t Mr t.t t.�,t� kt ;rx 3' /.. � 1.? I{c.,,. 1 - �N l'l'ktid.� I}f �e:7_ ( �� f'! � '�.• �! 4',it - , �., { ,Ydt'�1 .e. ,41.t 04•-• `t �' 0 i ..• '-' PP ,i�J 20 it. ,,F„ , ,,,� ', �=.If :d > 7 :1 ., • 1 Recommended Plan ;General Features The plan has been divided into live reaches. This division allows evaluation of Under the control conditions proposed by this plan,flows along the river are.con- ' each reach as to its feasibility,technical features,and estimated cost. siderably reduced at the Ramona Expressway crossing with the San Jacinto River \ I and at all points downstream from the hamona Expressway.The plan will provide The reaches are described as follows: containment for floodwaters within leiees in a part of the upper portion of the study area;will allow the portion of the river between the Corps of Engineers lev- 1. Railroad Canyon to Highway 395 ee and Highway 79 and between Lamb Canyon and the Ramona Expressway to remain unchanged; will use the Lakeview ponding area as a temporary area for • 2. Highway 395 storage of flood flows;and will allow temporary ponding of flood flows imme- `- diately upstream from Highway 395 for a limited period of time. 1 3. Nuevo(Highway 395 to Ramona Expressway) ' 4. Ramona Expressway I l I � I 5. Lamb Canyon to Highway 79 1 t` , I_�___� �` fQcH 5 r • i�.� 1 II / 'Mee VIM NA • "' �� • Ci"• )SAK EWi 44, ' ' �t ' G y° i P `,r \ ' NUEVO LAKE PEKKIS L"+r ro jv "'i"s cono"r000 �.r+ur SAN JACINTO Q r • tt i , • t i.l •'I','' ` z F 9 SCALE-MILES a 1I �� Y b °' 0 1/2 t 2 3 �C 6 `� �� a t� /,' • �` E KOMOLAND ", rr r• HEM.NEMET ET �w 't 8 Reaches vOINA /' "vrinr a" I II I a; Figure 6 of 21 Reaches 7 / Railroad Canyon to Highway 395 thereby allowing side drainage to flow into the channel when future development I of the area requires this side drainage to be accommodated. Design flow: 6,000 cfs i �I !19 01t1Ca$1j1j Bross!the-channel in the upper,portlor}of the reach. Channel bottom width: 110 feet Existing bridges at these two crossings remain without modification.The channel Total right-of-way width: 260 feet and 400 feet will be modified to increase its capacity from 1,000 cfs to 6,000 cfs and will be Side slopes: 2'horizontal to 1'vertical in Railroad Canyon modified at the bridge crossings so that the channel will meet the existing bridges. 4'horizontal to 1'vertical in fferris Valley These two county roads will then become all-weather roads. Section: Excavated,no bank protection required The timber trestle substructure at the Atchison, Topeka and Santa Fe Railway Total Cost: $1,210,000 crossing will require modification to protect and support pile bents because the existing channel at the trestle will be widened and deepened and will expose the The improvements planned in this reach begin about 4.5 miles upstream from existing trestle substructure. Railroad Canyon Dam at Station 247100 and end at Highway 395.The improve- ments involve the excavation of a trapezoidal1channel with a bottom width of 110 Underground utilities to be relocated in this reach include one 33-inch diameter feet with 2 to 1 side slopes in Railroad Canyon between Station 247400 and Sta- water main,one 16-inch diameter water main,and two underground telephone ca- t tion 320400,and with 4 to 1 side slopes in Perris Valley between Station 325400 tiles. and Station 480400.The channel is approximately 12 feet deep through the reach with the exception that at the downstream',end the channel makes a transition from a 12-foot deep channel and meets the existing flow line of the river channel. Cost Estimate In the Railroad Canyon portion of the react it is recommended that the final de- Excavation 75,400 c.y. @ $3.00 S 226,200 sign of the channel cross section will be altered from a true trapezoidal-shaped 1,342,700 c.y. @ 0.50 671,350 cross section to preserve as much of the natural character of the canyon area as possible. 1 Bridge Modification—Case Road Lump Sum Lump Sum 20,000 t —ATSF Railroad 25,000 ! The hydraulic grade line of this reach is controlled at the downstream portion of the reach because of the backwater caused by use of the natural portion of the Channel Slope channel upstream from Railroad Canyon Darp.The flow velocity in the reach is a- Protection —Case Road&ATSF RR Lump Sum 24,500 bout 4.5 feet per second at peak discharge. —Goetz Road Lump Suns 30,000 The Riverside County Flood Control and Water Conservation District has acqui- Gaging Station Lump Sum 2,000 red some rights-of-way or easements within this reach. These acquisitions have been made in the upper portion of the reach and in some portions of Railroad Utility Relocations Lump Sum 29,000 Canyon. I Subtotal Estimated Construction Cost $1,028,050 An existing weir constructed a number of years ago to provide a means of stream gaging will be removed by the channel construction and must be replaced. Engineering and Contingencies(15%) - 154,207 Alignment of the reach has been planned t� follow the route of existing river Total Estimated Construction Cost $1,182,257 channel within the canyon area. The channe has been horizontally aligned to re- quire a minimum of rock excavation. In the canyon areas estimates have been Right of-way' 32 ac @ $800/ac 25,600 made which indicate that of the total excavation involved,20%will be rock exca- vation,40%difficult,and 40%easy excavation. Legal&Administrative(7.5%) 1,920 In the upper portion of this reacts within P4ris Valley the channel will follow an Total Cost •$1,209,777 existing right-of-way with no additions requided.The channel will be excavated so that the hydraulic grade_ line is below existing grade adjacent to the channel, ROUND TO $1,210,000 I 22 ! Highway 395 Design flow: 6,000 cfs Cost Estimates ' Channel bottom width: 110 feet 11 Excavation 69,00O c.y. @ $0.50/c.y. $34,500 Total Cost: $77,000 I Roadway Embankment 24,800 c.y. @ $0.20/c.y. 4,960 Improvements at Highway 395 have been planned to regulate the flow of flood- i waters under Highway 395 to 6,000 cfs.This regulated flow will equal the capPoi aci- Reinforced Concrete V ty of the trapezoidal channel described in the downstream reach entitled Railroad Control Wall i 74 c.y. @ $150/c.y. 11,100 Canyon to Highway 395. Riprap(18") ' 307 c.y. @ $13/c.y. 3,991 A collector channel and levee constructed along the northeasterly side of Highway 395 at the crossingwill direct floodwaters to flow under Highway 395.The levee 9 Y i Grouted Riprap 620 c.y. @ $20/c.y. 12,400 is planned to have a top elevation of 1417.0 and has the function of keeping the surface waters of the upstream temporary pond from flooding the north lanes of • Subtotal Estimated Construction Cost $66,951 Highway 395.Modifications of the channel under the highway require excavating an additional 8 feet below existing invert elevations to make a total depth from Engineering and Contingencies(15%) 10,042 highway travelled lanes to new drainage facilities invert elevation of 18 feet. Total Estimated Constructioh Cost $76,993 • No additional rights of-way will be required to allow the construction of the i planned facilities. No relocation of utilities to accomplish the highway drainage ROUND TO • $77,000 modifications and levee construction will be required. 111 . I t4 t yYlmyilr ' lt4 ,11% • y i �E Jam .. 40 141 . !. T1*)7.�y�- t. • t '.rr' r 5 1 . . • a tl' �i ;:q a A . +KI Kr t ke'Lr r a. 7'a fs a lit'ittt;4i'llellt) ,•fie,_ v r.,, ^ }�ti` 9R1'141 j, 1t()1 L;12 „i 1! •,f tH {i '" t - �t ''' .'} 1 '; ' 4ki �,Jill 1 t j• r rt. 4it1 :., - ,„.! a 'Z f r�1r �.t. J Y to: 1 ". • ; •1 • " . . jt'41 " E �•i r•.1 r 7 ' t._1.r',$.• !',:I .. ,.t1 Tilli��, ,T.A7d.! "••*,•.Ge.'."�•��,-. • •�y� lfy;r1 41:4l '/ ft k., Iil,Rb ter, r'" "" ' •1 f ISMONIZZigi liftd 11. "�L t.t , h I. 1 s I: e is 4,4 , �a ' 9 t,�4.24 rttt;, 1.14, .' fi '1 4.S a v`t • r 1' 1 �r+I ,t�4s-1, iv.-4ill' 3 ,..,,it • {>'t-1-t.9k 1 j 0. ,., .'w , '! i r ! 1" '.I a o ico., r il1 AA y : d t�v tit' r. " F r. _Alp r.,,,, , . 1 , jr , aar ' 1 .,Kiser p.� r �rlt.{':tAll• . � '} t # �l� t(u .�� ;.1 5 Y 4 { rtef I, r i Fifi� )of�3{A'• x fi ; �ht. :!) ,.k l .4 , -i, ri, .I' • iPI D .1 JJ Jt, r v* } li,t', {k t1�p rII.'• rl'r.. f, i,f I'"11M, (, 14: II fati t 1' 1xrSi ;t,�1'te i!16:( IYA .1I1..+^7t + 4 }1-Nit tl''. j' ., ,.. I , I.., .'��: r 1 , •* 1311'.•� **, ,}.4,t4,jttt 1) i':r:A t • f ' .•'L1L :h.( /`�iiy ,imp. i '�.qq+t, �( q(y ! 1 i .4- •. A. t'.are • ((` iT�t) ' 1 '!.y7 1 < 'J jt{lI 1.' 111q'• 1i F)i I },11_f t_f$.\! (Ili . li,)..+ jiff 't', r ,1,,. i t:";,e , - .fii i.11.; ,.t� r 4 ,. •S - j +i, ; I la, .'rcl'rL' 'i� 1 ,i- t1 . w •�- gt. if �1 , I., • � 1 �I'''.'' ' 4s,�.'.iii; L v..J. Vk'.ai&w. rL•.: d1 4 9 •:Lite• ,., :.i.i....ea ...s:aw.. .t.' 23 Nuevo Hi hwa � i; Y 395 to Ramona Expressway) Design flow: 6,000 cfs (Channel bottom width: Varies—35 feet,96 feet, 140 feet,200 feet nde The major underground utilities located within this reach require relocation. These utility undo relocations are as follows: Total right-of-way width: 180 feet,400 feet,and 500 feet Side slopes: 4'horizontal to 1'vertical Section: Excavated,no bank protection required;partially excavated Utility Relocation Utility Owner and leveed section,with no bank protection required Total Cost: $922,000 I 18"Water Main Eastern Municipal Water Dist. 33"Water Main Eastern Municipal Water Dist. 16"Gas Main So.California Gas Company This reach of channel begins at Section 481 t00 and ends at Station 801100,be 24"Gas Main So.California Gas Company ginning at Highway 395 and ending at the Ramona Expressway. Telephone Cables(2) General Telephone Company Protect Lakeview Siphon Immediately upstream of Highway 395 flows from both the San Jacinto River (first barrel) Metropolitan Water District and the Perris Valley Storm Drain will join tinder once in-one hundred yearflood Modify Outlet Channel Western Municipal Water Dist. flows to form a temporary pond.This pond Will store floodwaters and will seek a nraxinurm water surface elevation of 1,415.0. Road crossings of river channel with County roads: The water surface elevation of the temporary pond should be compared with theCounty Road Modification water surface elevation of 1419.5 which would exist under the effects of the once in-one hundred year flood flows under existing conditions. These water sur- San Jacinto Avenue Crossing replaced with dip section. lace elevations should be compared with the elevation of 1416.0 which is the ele- Nuevo Road Use stigh County road bridge cation of the bridge crossing over the San Jacinto River, with slight modification. I I 1 A trapezoidal channel 35 feet in bottom width, 12 feet in depth,with 4 to 1 side slopes begins at Station 481400 and ends atStation 624r00.This excavated clha- nnel has a capacity of 4,200 cis.The trapezoidal channel cross section changes at Station 627+00(Nuevo Road) to a channel 95 feet in bottom width, 12 feet in I depth,with 4 to I side slopes.This channel has a capacity of 6,000 cfs.This cross section continues upstream to Station 725t00 which is approximately .5 mile downstream from Metropolitan Water District pipelines.The trapezoidal channel cross section changes at Station 730r00 to a channel 140 feet in bottom width,7 feet in depth,with 4 to 1 side slopes.The ch nnel cross section i;;partially excava- ted and partially leveed between Nuevo Roacand the Ramona Expressway. The upper channel section between Station 61+00 and the Ramona Expressway is 200 feet in bottom width,6 feet in depth,with 4 to 1 side slopes.The steal- i lower channel is required to provide cleara-rce between the Metropolitan Water District aqueduct crossing with the river channel at Station 761+00 and has been planned to avoid costly lowering of these aqueduct facilities.Because of the levees which are combined with shallow clrarrnelsiin this reach,overland or side flows which will drain into the channel when land?adjacent to the channel develop will require special treatment so these side flows an be drained into the channel. Additional rights-of•way will be required in us reach to allow the construction of planned facilities.In the area from Station 493 to 562 at San Jacinto Avenue,this right of-way will be 180 feet wide and will Involve the acquisition of 29 acres.In the area from the Ramona Expressway to 5 mile downstream,a varying width I right of way will be acquired, involving the!acquisition of 10 acres, in order to provide 180 feet of right away easterly of ttre channel centerline. I 1 24 • r -----\ 11 , . • ' Cost Estimate 1 f Ilighway 395 to Nuevo Road: r Excavation 551,000 c.y. @ $0.50/c.y. $275,500 ! Dip Section at San Jacinto Avenue Lump Sum 15,000 I� Utility Relocation Telephone Cable lowering at San Jacinto Avenue •270I.f. @ $6/I.f. 1,600 33"EMWD Waterline lowering 250I.f. @ $30/I.f. 7,500 Right-of-way 29 acres @ $800/ac 23,200 Subtotal $322,800 Nuevo Road to Ramona Expressway: Excavation 700,000 c.y. @ $0.50/c.y. 350,000 Embankment 185,600 c.y. @ $0.20/c.y. 37,100 MWD— 1st Barrel—Protection • Concrete Blanket lump Sum 5,900 Riprap Lump Sum 2,000 WMWD Outlet Facilities modification Lump Sum 16,100 Utility Relocation EMWD 18"Water Lump Sum 7,000 24"11.P.Gas Lump Sum 28.000 16"N.P.Gas Lump Sum 24,000 Telephone Cable Lump Sum 1,500 4"Gas Lump Sum 1,000 Right of-way 10 acres @ $800/ac 8,000 Subtotal $480,600 Reach Estimated Construction Cost 772,200 1 Engineering and Contingencies(15%) 115,830 ' Total Estimated Construction Cost $888,030 Right of way 39 acres @ $800/ac 31,200 Legal and Administrative 17.5%) 2,340 , Total Cost $921,570 r ROUND TO $922,000 1 25 M • 1 1(}� i •'4 '1I ' 1 • , I�+r;•~ `�i'' 11;''.4:1F • 1 •1 ( _.• 1' ' l..' _• c...• 1-,: rj r•• ., • 1 1,T 4. ,,,a,rl ` ! '• F`�+" ., ! 1:[t ,• , • .I• ...itui r 1..:_ . . .r! tf ' 4 -rf} I ,,� This water surface elevation is slightly lower than the water surface elevation of s�it.• ,i t ' 1_1 r ;"'•' :j •+ ,:)r i ' '•'1,•r • - the temporary pond anticipated under existing �.,l, ;.�`1 s • •, ,, -,F is==„ .i I Y np' conditions.dre This maximum water surface elevation under the effects of a once in one-hundred ear flood is 1,430.0 _ _ i 441 •:.,' feet. I, _ 1� ..Ir. ��1F yrr„r+ i eLP + �, r ,11 y•3t ice; The release of floodwaters at 6,000 cis through the structure at the Ramona Ex. ,�mil • a , •••• '-I -;e,#*;:i.•.i.f.;t0,1 ih -h ik'r -E �N -r'{, � P l Tr' pressway reduces the temporarily flooded area upstream from the Ramona Ex. 1 I.. , , t • r ,,i t -+. ii,f , iytk .t If . .}� pressway to a slightly smaller size than the pond which forms there under existing H •• •I I vf, : e �5b i ��7i conditions. This slight reduction occurs because the planned channel below the t� y1 .., • l ♦t 4,di .1 `•. t' '' -' lir • . Ramona Expressway has a lower flow line and a higher hydraulic capacity than • ` ■ � �••1, ,: , '1 '' tthe natural waterway. • it i� l t is 1� :• • .•'t ., a i-,rst-, 1 ' d� ,, z4 . . . 3 II, An additional 70 foot wide right or way will be required along the existing Ra. etp s •' . r;rit mona Expressway alignment at the intersection of the highway right-of way and . .. tr ^'r #a_y ' ♦ ? hr + •y" a i K"`,s.'r•• • ` the San Jacinto River. �'d- • 4 r,. • ( :T1t t .(t:, The importance t.,,A.. t J i ' r I • of the structure beneath the highway right-of-way and the con. ti ''1 ,••. •r �s • j!t' c � ;,,t•i ij'4 " 1i{I �� i 7 struction of the highway embankment is that these features of the San Jacinto �/" �� „•' y} it f It , • , a,1 1.(1^ •, -ill River Plan allow use of an existing ponding area and permit the regulated dis- �y r• , 1 [tit `• ;t; •,;itr )s�,. aya to,U charge of 6,000 c(s downstream horn the Ramona Expressway,thereby reducing +r - • j'�rr . ,j. r 1` 1its-�j'+ ,1 ( ' V•h i the amount of blow in the once in one•hundred year flood from 58,250 cis to f: t r r 1 Frt sJ(� ; ;:� t� r- Lr xtr k t ' , +h•` 6,000 cls. ' 14 .. t.,;� 1 , i ;,r for j � tN1 + .' r , (� =r t�ji f !' 7 ,,}: Since this once-in one-hundred year flood flow is greatly reduced,the facilities re- f+�t• t �• ' f�rtj , , a,tt ,+. r 1quired to control the flood flow downstream are read reduced in cost.Existitk•7 t �f y ff. [ ;<A: greatly Existing 7 ;f 1 j ( _ } i !II. 9h y dges,major underground utilities,and road crossings between the Re-G, P+a,� «���I �tyr �: k> r- q ;, fi; mona Expressway and Railroad Canyon can be used without major reconstruction r 4....+ • LL y, ,, { t t (lei, • 111 '';' tr.', , 1it�t [1[ and Improvement of these facilities;and, therefore, the cost of this plan is made jlt ••D ,% . f 1. `'1 • r t ;/2,t4 X s more reasonable. r • • -.Li. rl`. 1 f,, ,;f•,1 a " ` `rS l'HL,i `vjl r 1f . :_I rtr, a .;_ f� II. . • Rainona Expressway Cost Estimate Excavation upstream Design flow: 6,000 cis to drain 14,400 c.y. @ $0.50/c.y. $ 7,200 Structural improvements: Embankment for new lanes,seven barrels 10'wide x 5'high Roadway Embankment 115,000 c.y. @ $1.00/c.y. 115,000 Reinforced Concrete Boxes 1 Total Cost: $316,000 , Asphalt Concrete Pavement 4,800 tons @ $11.00/ton 52,800 Aggregate Base 3,545 tons @ $7.00/ton 24,815 The improvement planned within this reach includes the construction of the two westbound lanes of the Ramona Expressway.These lanes will be built adjacent to and northerly of the existing east- Reinforced Concrete Box (412 c,bound lanes of the expressway.The finished roadway at elevation 1,432.0 feet is planned to be lo- y.concrete) Lump Sum 62,000 cated at least two feet above the maximum water surface elevation of the Iloodplain caused by a Riprap I18") once-in-one hundred year storm upstream from the Ramona Expressway. p p 370 c.y. @ $13.00/c y. 4,810 The new roadway will he about one mile long,will have an elevation high enough to protect the Subtotal Estimated Construction $266,625 eastbound lanes from flooding,and will provide protection so that the Ramona Expressway will become an all weather road. i Engineering and Contingencies(15%) - 39,993 A drainage facility consisting of seven 10-foot wide by 5-foot high concrete box culverts will be I constructed through the new roadway fill and will be designed to permit the maximum release of Total Estimated Construction Cost $306,618 6,000 cis downstream from the Ramona Expressway. It is recommended that the box culvert flow line grades be placed at an elevation of 1,416.0 feet Right of way 7 acres @ $1,200/acre 8,400 or lower if the downstream channel design permits so that it will be possible to improve the up• stream drainage characteristics of the Lakeview ponding area. Legal&Administrative(7.5%) 630 Temporary ponding will occur in the area upstream from the Ramona Expressway as ft has oc- Total Cost $315,648 I` coned in the past.The water surface elevation of the temporary f 26 i onc hond will have a e I undred-yeara ximum esti mated water surface elevation of 1,429.8 feet during tire Flood flow. ROUND TO $316,000 k Lamb Canyon to Highway 79 Cost Estimate Design flow: 58,000 cfs downstream of Potrero Creek and 53,500 cfs upstream of Potrero Creek I. San Jacinto River Construction Channel bottom width: Varies—generally 1,100 feet Total right-of way width: Varies; 500 feet to 1,250 feet Side slopes: 2.25'horizontal to I'vertical Levee Embankment 340,000 c.y. @ $0 75 $ 255,000 RSection: Levee on south bank wills some new levees along north bank.Riprap bank Filter Blanket 43,500 c.y. @ 1 100 478,500 protection on all new levees except on the left bank near the downstream Filter ng 1 14,500 c.y. @ 9.00 130,500 end of this reach. Utilities,crossing MWD lines,contingency 10 000 Subtotal Estimated Construction Cost $ 874,000 Total Cost: $3,560,000 I This reach begins at Station 1211+15 and ends at Station 1350100 and is approxi Engineering and Contingencies(15%) 131,100 mately 3.25 miles long. Total Estimated Construction Cost $1,005,100 The improvements planned in this reach include the construction of a levee along the southerly side of the San Jacinto River between Lamb Canyon and Highway RrghPol way 230 ac'@ $2,500 575,000 79.The new levee is to be constructed on existing ground.The existing south lev- ee may be removed.Since the natural terrain of the channel in this reach slopes to Legal and Administrative(7.5%) 43,125 0 the southwest,low flows in the San Jacinto River will flow along the south levee. In order to protect this levee,riprap is planned on the inside lace of the levee for Total Cost the entire length of the reach between Lamb Canyon and Highway 79. ROUND TO $1,623,225 $1,625,000 A collector levee is planned parallel and adjacent to the west side of Highway 79 joining the upstream end of the proposed south levee.Floodwaters of 53,500 cfs II.Sanderson Avenue Realignment—• Potrero Creek from the once in one hundred year storm flowing uncontrolled upstream from C6annefizatton anr(Inu�ation Area this point will be directed into the channel located downstream from Highway 79. The channel will be 1,100 feet in bottom width and 6 feet in depth downstream Bridges: River 40'w x 800'1 @ $30/sq ft. $ 960,000 from this point. Potrero Creek 40'w x 100'1 @ $30/sq.ft. 120,000 Roadway Embankment 128,000 c.y. @ $0.75 96,000 The existing north levee between Station 1282400 and Highway 79 will remain in Asphalt Concrete Pavement 8,600 tons @ 11.00 94,600 place and will be used to form the right bank of the levee system which will con- Aggregate Base 6,100 tons @ 7.00 fain the once in one hundred year flood flows. 42,700 Remove berms at Sanderson and construct cut de sac 3,000 Potrero Creek will be controlled by a roadway fill constructed above existing Subtotal Estimated Construction Cost ground grades along a new alignment of Sanderson Avenue.Potrero Creek will be $1,316,300 M allowed to flow westerly of the highway embankment of the new alignment of Sanderson Avenue. The debris and silt will be deposited during flooding of Pone- Engineering and Contingencies(15%) 197,445 ro Creek on the alluvial fan located southerly of the mouth of Massacre Canyon l and existing Highway 79.The realignment of Sanderson Avenue and the raising of Total Estimated Construction Cost SI,513,745 this highway above flood lines of both the San Jacinto River and Potrero Creek will provide the means by which a bridge across Sanderson Avenue can be built at Right of svay 157 ac @ $2,500 392,500 elevations which will achieve the goarof an all weather crossing of the San Jacinto ' River at this location. Legal and Administrative(7.5%) 29,437 Containment of the once-in-one-hundred year flood flows within the levee system Total Cost described above in this reach will achieve the debris control sought for Potrero ROUND TO $1,935,682 Creek and will prevent overflow of the San Jacinto River which can cause severe $1,935,000 damage to adjacent agricultural lands and the resort facilities at Gilman Hot TOTAL FOR LAMB CANYON TO,IIIGIIWAY 79 REACH $3,560,000 Springs. 27 I 1 ,, 1 . -------\ Cost Estimate SummaryThe following tabulation is a summaLy of the estimated construction and other re- lated costs required to improve the live reaches of the San Jacinto River to the standards described in the preceding sections of this Master Plan. Item Description I Total Estimated Cost i Excavation S1,564,750 Embankment Roadway 253,060 Levee 255,000 Bridges Construction i 1,142,000 Modification 56,100 Channel Slope Protection 54,500 Riprap Protection 630,201 Roadway Construction 232,915 Utility Relocation and Protection 135,600 • I I Sub Total Estimated Construction $4,324,126 Engineering and Contingencies . 648,617 li V I1 Total Estimated Construction Cost $4,972,743 Right•of Way Acquisition 1,032,700 II Legal and Administrative 77,452 4 Total Estimated Cost 56,082,895 ,', ..)44,..L_,l Round To S6,100,000 -- -t. ___ __. 28 r a ' Special Recognition a 1 r I I RIVERSIDE COUNTY FLOOD CONTROL AND WATER CONSERVATION DISTRICT 1995 Market Street,Riverside,California 92502 1 Riverside County Board of Supervisors San Jacinto River Master Plan Advisory Committee IClayton A.Record,Jr.,Chairman James H.Adams Kenneth R.Melie William E.Jones Dr.William G.Aldridge Charles Motte I A.A.McCandless 'John Barbee B.D.Powell Donald L.Schroeder Hammerschmidt 'James Richards A.Norton Younglove Arthur Herman William M.Stewart 1 William Hynds Charles Van Fleet IRoland Mann • Zone 4 Commissioners I John W.Bryant Chief Engineer Robert O.Eid Kenneth L.Edwards Assistant Chief Assistant Chief IFlood Control Engineer Flood Control Engineer District Planning Staff IProject Hydrology,Control,and Review Robert A.Nelson,Planning Engineer I Frank J.Peaks.Associate Civil Engineer with assistance from: Craig Cook,Associate Civil Engineer Grant Becklund,Assistant Civil Engineer I John Kashuba,Assistant Civil Engineer ti 3 lI / I 1 29 , Bibliography and references used in preparation of the Master Plan for the Lower San Ja- cinto General Plan--Land Use,Highways,Recreation.Riverside County Planning Corn- Mapscinto River Basin include: mission(July, 1966). Basic Hydrologic Data for Once-ina-100-Year Frequency Storm at Railroad Can- General Plan for Parks (Preliminary). Riverside County Parks Department. Scale you Reservoir on San Jacinto River. Bookman arid Edrnonston(November 16, 1:126,740(1914). 1967). Geologic Map of California.State of California,Division of Mines and Geology, Environmental Impact Assessment: Guidelines and Commentary. Edited by Department of Conservation. Thomas G. Dickert with Katherine R. Dorneny. Berkeley,California: University Extension,University of California, 1974. Hemet-San Jacinto Area General Plan. Expanding the Environmental Responsibility of Local Government. Edited by General Plan of Highways for Riverside County,California: Elennor Cohen. Claremont, California: Printed for Center for California Public Affairs. CONSULTATION Flood Plain Information,San Jacinto River(San Jacinto River to Railroad Can- The organizations,agencies and districts that were consulted in preparing this re yon).United Stales Army Corps of Engineers, Los Angeles District(May 1970). port include: Preliminary Examination of Proposed Flood Control Projects in Riverside Coun- Atchison,Topeka and Santa Fe Railway Company ty, Santa Ana River Basin and San Jacinto River Basin, Banning Canyon and Brownlands Mutual Water Company ' Wastewater River Basin.RCFCD,Riverside County Surveyors Office(1938). California,State of Department of Fish and Game Department of Transportation Projected Average Hydrology(or the San Jacinto Watershed 1970-2000,A Report Eastern Municipal Water District on Task Order XV ISI 1.Krieger&Stewart for the Sato Ana Watershed Planning Agency(February 1973). r Elsinore Valley Municipal Water District Four Corners Pipe Line Company Real Estate Atlas—Riverside County,California.A.R.C.A.T.A.,Real Estate Data, General Telephone Company of California Inc. Hemet,City of Public Library Lockheed Remap(Riverside Extended Mountain Area Plan).Research and Analysis Report. Metropolitan Water District of Southern California Riverside County Planning Department,May, 1973. Nuevo Water Company Pacific Lighting Service Company Santa Ana River Basin,California,Flood Control Design Memo No.1,Hydrology Pacific Telephone and Telegraph Company for San Jacinto River and Bautista Creek Improvements. United States Army Perris,City ul Corps of Engineers(July 1959). Riverside Cable T.V.Company j Riverside,County of Sao Jacinto Watershed, Physiography, Climate and Hydrogeology,Final Report Parks Department on 1 ask Order XIII (S)5 Prepared for Santa Ana Watershed Planning Agency by Planning Department Totgrs Engineering,Inc.(March 1973). Road and Survey Department Flood Control and Water Conservation District San Jacinto Watershed,Present and Projected Allocation of Sources of Water Sup- Riverside,City of Municipal Museum San Bernardino County Museum Association ply and Wastewater Disposal. Krieger & Stewart lot the Santa Ana Watershed Southern California Edison Company Pluming Agency(May 1973). Southern California Gas Company San Jacinto Valley,Fault Displacement(Including Structural Geology of the Casa Southern Pacific Pipre Lines p San Jacinto River Master flan Advisory Committee Lonna Fault).John D.Feu and Richard J.Proctor(January 1967). The Hemet News Survey of Santa Ana River and Tributaries,California,For Flood Control.United Temecula Water Company States Army Corps of Engineers(November 1, 19461.1 United Slates Army Corps of Engineers Western Municipal Water District of Riverside County Soil Survey, Western Riverside Area, California by Arnold A. Knecht. U. S. Photo Credits Department of Agriculture,Soil Conservation Service. County of Riverside Flood Control and Water Conservation District I' Topographic Maps of California,Geological Survey,United Stales Department of U.S.Soil Conservation Service the Interior,Washington,D.C.20242. District Conservationist—Mr.John R.Reid 30 i • or. ' I -_.'..;'fie,•' f _ i T. 1� .i�� - .._ 3•• - . .,,- f,.�... F, 1 1 I 'N ►�..- •.43--;.4'.'1 I `.I .r 'f I., t a-J I'' I fI •ay4- 1!*'a- ir` i:- 1 I t 1p✓�rz .i , �•'_.I l-L-• 1•:'' .I 1Y`_ �_gci b/_ 'mT • • •. i . s s t i it .t 1 . . 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'M ; e; ` E --_- / / _ _•c .( K'[Ywn. ///' P 0/ / . i. ,-,, :.: . 7 4.3 4 , • . • Plan • an Jacinto Avenue '.j I. ,' - • Plan•Ellis Avenue SCALE ' -,i4 ;-);i• •, .•; i. SCALE 0 O IW 200 •- .i.: 1 E•L.� Gt � • ~- r •• NOTES: + i'4.�(,'' U EXISTING A C PAVEMENT ErIS/1NG • NT AND DIP SECTION k w ' TO SE REMOVED •:j :rf` I (2 REI OCATE UTILITY POL.E. — Tr1146 260 •!L.: '.l,_}• • 260' CHANNEL .r '1 • E, wAT • ...3(I•',L . •__ t/ATUjtAL GR011fAp s — ••Y ri i .B-.JO�[4B-60 EL LONG.., r r •,. r 1 I i '1;�,..;.''I:i' Profile -San Jacinto Avenue .�..1. SCALE 0 IS 60 I Sari Jacin to YTiop Prepared Fort Prepared Dy1 1 Railroad Canyon To Highway Riverside County Flood Control Neste, 11r� Detail Ellis Avenue and DIP i ghway 79 IL.0 U Water Conservation District Civil Engl Section San Jacinto Avenue Date I=/74 Sht.IJo12t I 11 ,CON11EAQWAIGFir L CCRTROL O' I I I - - 1 ELEV NIEO WTORAL ORO�IND i —- ORW P TED RIP 4113 LEY 11110 ! !7y i I V,1 S. 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RM ARIS LING R/W WIOTN 1Q0' R/W' • MOT 1 MN r.• 25' '�5' 2 • STA.323100 10 STA.981 1 96 �� ` - (EXCEPT FOR GOETZ ROAD a CASE ROAD--A TRS F.RAIL ROAD CROSSINGS) ••'�-:1. RAILROAD CANYON 70 NIGIIWAT 395 i - _ExIs11TIG N/W WIOTH 900'(SAN J�CIN TO EVE,TO NUEVO R0. R/W T `• 1---TA*7.79-7sfg R/p WIOTII IRO•I.1221 Ares---1 ) 'a• / 'I :I ' '1. • I ` may' FT,rt [[[ AMN. 25. 7whir •'IIIF�•�,af� -�Qes.Rfto•... ' ::'•ti'!{ STA.402/29 TO STA.629100• 'I I'11 I HIGHWAY 395 IDNUEYO ROAD • • -r•i; r,. R/W it '' r• . — --.—_..t11311N4 Pi+W WIQ1N Kitt - R/W I 1•�p.{. -+ n• MR )} ,,s; • • I r � sm.627+00 TO STA.T25+00 1 I r ,I''.',.. ', la s. { 1 • „11 ••'11r ' '' I• • • SCALE ' '�i.•, San Jacinto River Prepared Fors Prepared By: �rt ' . Highway g y Riverside County Flood Control Neste,Brudin(!Stone Inc.;:. al]ioad Canyon To H1 hwa 79 Channel Sections ',�'. IlRaterConservatlon District Civil Engineers Date 12/70 Sbt.19o(it ill • 69 k _ 1 • W7 ui C N o i mN j g M O A ¢mu<i ! 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'TIG'V J�J11; SCALE 0 20' 40' 00 li San Jacinto :Rider . : 1- Prepared Fors Prepared Sy: � Channel (f Levee Sections I f� Riverside County Flood Control Neste,BrudlnIStone Inc. Sta.11SS too To Highway 79 / T Railroad Canyon To Highway 79 &Water Conservation District Civil Engineers Date 11/74 Sht.21o121 73 - AGENDA ITEM NO. - CITY OF SAN JACINTO STAFF REPORT TO: Honorable Mayor and City Council Members FROM: Brian McNabb, Director of Community Development via Dennis R. Halloway, City Manager DATE: November 26, 1996 SUBJECT: REDEVELOPMENT IMPLEMENTATION PLAN RECOMMENDATION Approve the amendment to the Implementation Plan for the San Jacinto Redevelopment Plan and direct staff to schedule the required public hearing to review the progress on the Implementation Plan. BACKGROUND On November 5, 1996, staff presented an amendment to the RDA Implementation Plan which had been previously approved on December 6. 1994. The amendment to the Implementation Plan was necessary due to the settlement of the lawsuit involving the amendment to the Redevelopment Plan. The proposed amended language was underlined so the Council could see the specific changes. Due to the fact a majority of Council members had never seen the Implementation Plan before and the potential for policy changes, the Council asked the matter be discussed in more detail at the special session of November 26th. DISCUSSION In 1993, the State passed major changes to Redevelopment law when AB 1290 and AB 315 were enacted. The law became effective January 1 . 1994 and contained a requirement that a Redevelopment Implementation Plan and Housing Compliance Plan be adopted prior to January 1 , 1995. and every five years thereafter. Required elements of the plan include: The goals and objectives for each project area for the next five years. The specific projects and expenditures to be made in each project area for next five years. An explanation of how the projects will eliminate blight and meet the low/moderate income housing requirement. A demonstration that we are working on meeting housing needs and an analysis of how we are doing on meeting the required goals. A requirement that, no sooner than two years and no later than three years after adoption of the Improvement Plan the City is required to hold a public hearing on the Plan for the purpose of reviewing and evaluating the progress of the plan. The purpose of the Implementation Plan is to encourage an Agency to undertake some form of long range planning involving the projects and conditions listed in the respective Redevelopment Plans. However, the Implementation Plan does not firmly commit an Agency to a specific course of action. Rather, an Agency still maintains the flexibility to take advantage of shifts in market conditions and opportunities which may arise during the five year Implementation period. According to a report by Kane, Ballmer, and Berkman, a law firm which specializes in Redevelopment law, an Implementation Plan is not required to be amended if the Agency decides to take an action not mentioned in the Implementation Plan. In San Jacinto's specific case, there are a number of projects we are pursuing which are not listed in the Implementation Plan and there are some projects listed which we are no longer pursuing. Staff had prepared an amended Implementation Plan which proposed both deletions and additions. However, we did not forward this revision to you because two years had not elapsed from the initial adoption. We have attached a copy of the proposed amended Implementation Plan for your reference. The first three pages of the plan simply describe why we have a report, describes the project areas and defines what blight is pursuant to State law. The bottom of page one specifically mentions the Agency's right to fund projects beyond those mentioned. Page four is a specific list of goals and objectives , excerpted from the Redevelopment Plan. Pages 5-7 begin the list of projects that were taken from the Redevelopment Plan. The opening paragraph notes that some are housing related and may be funded from the housing fund rather than from non-housing funds. What the Implementation plan does not say is that other funds (i.e., C.D.B.G.) may also fund these projects. These projects are listed because they were both eligible for RDA funds and may have been in process. PROJECT DISCUSSION OJ 1 . Infrastructure Improvement Projects a. Sidewalks and handicap ramps into the Brown and Second Street neighborhood, from Main Street and Ramona Boulevard. Also install missing sidewalk north of Main Street between Estudillo and Brown. This project is related to the Brown/Second Street Demonstration Neighborhood housing project. Estimated timing of project, Fiscal Year 1995/1996. Estimated cost $50,000. This sidewalk project should complete all sidewalks in this area of the P City. Funding for this project is mostly from CDBG funds from two or three years ago. b. Curb, gutter, and sidewalk at the northeast corner of Shaver and Jordan. This project is related to the Jordan and Shaver 15 unit apartment complex housing renovation project. Estimated timing of project, Calendar Years 1995 - 1997. Estimated cost $40,000. The Jordan portion of this project was recently completed using housing funds. Should the Agency proceed with subsequent phases, staff anticipates housing funds will also be used. Based on our recent contract experience, the actual cost will probable be closer to $70,000, of which $20,000 has been spent. c. Sallee Park/Monte Vista Middle School Improvements. This is anticipated to be a multi-year phased project. Estimated timing of project, Fiscal Years 1995/1996 through 1998/1999. Estimated cost up to $755,000, depending on the ultimate improvements chosen. The City and School District have verbally committed to jointly improving Sallee Park/Monte Vista Middle School as a park facility. A plan was submitted at a joint meeting. The first phase is funded with CDBG funds. This entails the replacement of the playground equipment and making the play area ADA accessible. The Council should receive a briefing on this plan. d. Curb, gutter, sidewalk at the northeast corner of San Jacinto Avenue and Third Street. This project is related to the six unit housing project proposed for Calendar years 1996 and 1997. Estimated cost $40,000. The project at Third and San Jacinto is ongoing. We have spent approximately $20,000.00 on the first phase of improvements. There is $30,000.00 in the 96-97 budget for the balance of the project. This may be $5,000.00 under budget. e. Curb, gutter, and sidewalk on Santa Fe between Seventh and Esplanade. This project is related to the Tenth Street Demonstration Neighborhood housing project. Estimated timing of project, Calendar Year 1997. Estimated cost $146,000. The Agency has tried to create significant impacts with its Housing Program targeting specific areas rather than shotgunning all over the City. The methodology the Agency selected was designating target areas. The first target area designated was the Brown and Second Street neighborhood. This area was selected because the road was substandard. There were no curb, gutter or sidewalk. There were two vacant lots. The housing was not attractive. The second target area designated by the Agency was the Tenth Street and Santa Fe area. This area was selected because it lacked curb, gutter and sidewalk. Tenth Street is totally unimproved. There is no sewer in Tenth Street. The City owns property off Tenth Street. The housing in the area is substandard. There is a lack of parkland in that area. Subsequently, the Agency downgraded Tenth Street to a lower priority and designated the First Street area as the next target area. This area was selected due to general decline in the neighborhood, lack of sidewalk, flooding issues, alleys in need of closing and poor lighting. f. Acquisition of 5 acre site for construction of a park in the Tenth Street Demonstration Neighborhood. Timing of project to occur in multi-year phases, from Calendar Year 1997 through 1999. Estimated cost up to $750,000, depending on the ultimate improvements chosen. Related to project 1(e). There is a lack of park space in this area. Riverside County Flood Control owns property along the channel. g. Widen and install curb, gutter, and sidewalk on Esplanade Avenue, between the existing Stater Bros. Shopping Center and Hewitt Street. Timing of the project, Fiscal Year 1994/1995. Estimated cost $225,000. This project is complete. h. Main Street infrastructure improvements, including landscaping, lighting, and American with Disabilities Act access improvements. Estimated timing of the project, Fiscal Years 1996/1997 and 1997/1998. Estimated cost $250,000. This is a priority project which is on hold pending the installation of storm drain improvements on Main Street. The timing is more realistically in Fiscal Year 97-98 and 99-2000. Widen and install curb, gutter, sidewalk, and median at the intersection of Sanderson Avenue and the Ramona Expressway, and participate in the construction of related flood control improvements in this area. Estimated timing of the project is phased from Fiscal Year 1996/1997 through Fiscal Year 1998/1999. Estimated cost $1,000,000. This is the sole proposal related to the amended Redevelopment Plan. h:\CCRPT-96\I M PLEM ENT.BRF AMENDMENT NO. 1 TO THE SAN JACINTO AND SOBOBA SPRINGS REDEVELOPMENT PROJECTS FIVE YEAR IMPLEMENTATION PLAN FIVE YEAR HOUSING COMPLIANCE PLAN ORIGINALLY ADOPTED - DECEMBER 6, 1994 AMENDED - NOVEMBER 5, 1996 INTRODUCTION Assembly Bill 1290 (AB 1290), which took effect on January 1, 1994, significantly amended Community Redevelopment Law by imposing a number of new requirements on Redevelopment Agencies. One such requirement is the adoption of an "Implementation Plan" for each redevelopment plan. AB 1290 requires implementation plans to be adopted by December 31, 1994, and each five years thereafter. On December 6, 1994, the San Jacinto Redevelopment Agency adopted its first implementation plan, for both the original San Jacinto Redevelopment Plan and the Soboba Redevelopment Plan. In April, 1996, an amendment to the San Jacinto Redevelopment Plan took effect and added approximately 2,250 acres to the original 1 ,140 acre Plan. Community Redevelopment Law requires that a new or amended implementation plan be adopted for the expanded Redevelopment Project Area. This is the first amendment to the San Jacinto Redevelopment Implementation Plan. Redevelopment implementation plans are required contain the following elements: • The goals and objectives for the project area for the next five years. • The specific projects and expenditures to be made in the project area during the next five years. • An explanation on how the stated goals and objectives, projects, and expenditures will eliminate blight in the project area and meet the low and moderate income housing requirements. This implementation plan is not intended to be the finalized blue-print for all future projects listed in subsequent sections. This implementation plan is merely to identify the Agency's intentions and proposed projects over the five year period of the implementation plan. Changes or shifts in market conditions could arise over the five year period of the implementation plan which could alter the direction of the Agency. As a result, other projects which are not listed may be more appropriate to implement the goals of the Agency and Council at some time in the future. 1 II. SAN JACINTO REDEVELOPMENT PLAN The San Jacinto Redevelopment Plan was adopted by the City Council in June, 1983, and encompasses about 1 ,140 acres. In April, 1996, a 2,253 acre expansion to the original 1 ,140 acre project area took effect. The San Jacinto Redevelopment Plan now encompasses some 3.393 acres in 27 sub areas spread throughout the City. Land uses include undeveloped vacant land, agriculture uses, commercial, industrial, and public utility properties, approximately 2,500 dwelling units, and miscellaneous rights-of way. III. SOBOBA SPRINGS REDEVELOPMENT PLAN The Soboba Springs Redevelopment Plan was adopted by the City Council in November, 1983, and encompasses approximately 465 acres. The project area is generally located east of the San Jacinto River, near Lake Park Drive and Soboba Road (see map). Current land uses in the project area include the Mountain View Homes development, and the Soboba Springs Country Club and Golf Course. The Soboba Springs Mobile Home Park is surrounded by the project area, but was not included in and is not now a part of the project area. IV. BLIGHT DEFINITIONS This section of the Implementation Plan has been included to identify the legal blight definition at the time each plan was adopted. As defined by Sections 33031 and 33032 of the California Health and Safety Code, in 1983, the year both Redevelopment Plans were adopted, a blighted area was characterized by one or more of the following conditions: 1. Structural Blight The existence of buildings and structures used, or intended to be used, for living, commercial, industrial, or other purposes, or any combination of such uses which are unfit or unsafe to occupy for such purposes and are conductive to ill health, transmission of disease, infant mortality, juvenile delinquency, and crime because of any one or a combination of the following factors: a. Defective design and character of physical construction: b. Faulty interior arrangement and exterior spacing; c. High density of population and overcrowding; d. Inadequate provision for ventilation, light, sanitation, open spaces, and recreational facilities; and/or e. Age, obsolescence, deterioration, dilapidation, mixed character, or shifting of uses. 2 2. Economic Blight Properties which suffer economic dislocation, deterioration, or disuse because of one or more of the following factors: a. An economic dislocation, deterioration or disuse resulting from faulty planning; b. The subdividing and sale of lots of irregular form and shape and inadequate size for proper usefulness and development; c. The laying out of lots in disregard of the contours and other topography or physical characteristics of the ground and surrounding conditions; d. The existence of inadequate public improvements, public facilities, open spaces, and utilities which cannot be remedied by private or governmental action without redevelopment.; e. A prevalence of depreciated values, impaired investments, and social and economic maladjustment; and/or; f. The existence of lots or other areas which are subject to being submerged by water provided that any ecologically valuable existing features in such areas shall, to be maximum extent feasible, be preserved. Such conditions, one or more, must cause the following: 1. A reduction of, or lack of, proper utilization of the area; 2. To such an extent that it constitutes a serious physical, social, or economic burden on the community; 3. Which cannot reasonably be expected to be reversed or alleviated by private enterprise acting alone. V. IMPLEMENTATION PLAN GOALS AND OBJECTIVES The primary reason for the establishment of Redevelopment Project Areas is the need to eliminate blight within Project Area boundaries including problems relative to circulation, inadequate community infrastructure, and to assist the private sector in providing the type of development which will maximize the development of property within the Project Area boundaries and prevent the recurrence of the blight conditions. The following represent the goals and objectives of the Redevelopment Agency, as stated in the each of the Plans, to alleviate blight conditions in each of the project areas: 3 1. The development of property in a creative, coordinated land use pattern of commercial, industrial, residential, open space, recreational, and public facilities consistent with the goals, policies, objectives set forth in the adopted General Plan, Zoning Ordinance, and the approved specific plan for the area (Soboba Springs). 2. The development of public services and facilities including, but not limited to, recreational, maintenance, and operational services and facilities as are necessary and required for the development of each of the project areas. 3. The elimination of environmental deficiencies including inadequate street improvements, inadequate utility systems, and inadequate public services; and mitigation of highway impacts, including deficient circulation facilities, and its potential social, physical, and environmental characteristics of blight. 4. The development of a more efficient and effective circulation system free of hazardous conditions. 5. Beautification activities to eliminate all forms of blight including, but not limited to, visual blight, in order to encourage community identity. 6. The encouragement, promotion, and assistance in the development and expansion of local commerce. 7. The acquisition, assemblage, and/or disposition of sites of usable and marketable sizes and shapes for residential, open space, recreational and public facility development within each of the project areas. 8. The acquisition and disposition of property for the purpose of providing relocation housing, as may be required, to implement the objectives of this Plan. 9. To provide for very low, low, and moderate income housing as required by law consistent with the goals and objectives of the community. 10. To encourage the coordination, cooperation, and assistance of other local agencies, as may by deemed necessary, to ensure that projects undertaken by this Agency are implemented to their fullest and practical extent. 11. The achievement of a physical environment reflecting a high level of concern of architectural and urban design principals deemed important by the community. 4 12. To provide a procedural and financial mechanism by which the Agency can assist, complement, and coordinate public and private development, redevelopment, revitalization. and enhancement of the community. VI. PROPOSED PROJECTS San Jacinto Redevelopment Project Many of the general projects listed for the San Jacinto Redevelopment Project Area are related to the City's housing program. While general Redevelopment funds may be used to implement these improvements, some may be funded with housing money. The Implementation Plan proposes the following projects for the San Jacinto Redevelopment Project Area: 1. Infrastructure Improvement Projects a. Sidewalks and handicap ramps into the Brown and Second Street neighborhood, from Main Street and Ramona Boulevard. Also install missing sidewalk north of Main Street between Estudillo and Brown. This project is related to the Brown/Second Street Demonstration Neighborhood housing project. Estimated timing of project, Fiscal Year 1995/1996. Estimated cost $50,000. b. Curb, gutter, and sidewalk at the northeast corner of Shaver and Jordan. This project is related to the Jordan and Shaver 15 unit apartment complex housing renovation project. Estimated timing of project, Calendar Years 1995 - 1997. Estimated cost $40,000. c. Sallee Park/Monte Vista Middle School Improvements. This is anticipated to be a multi-year phased project. Estimated timing of project, Fiscal Years 1995/1996 through 1998/1999. Estimated cost up to $755,000, depending on the ultimate improvements chosen. d. Curb, gutter, sidewalk at the northeast corner of San Jacinto Avenue and Third Street. This project is related to the six unit housing project proposed for Calendar years 1996 and 1997. Estimated cost $40,000. e. Curb, gutter, and sidewalk on Santa Fe between Seventh and Esplanade. This project is related to the Tenth Street Demonstration Neighborhood housing project. Estimated timing of project, Calendar Year 1997. Estimated cost $146,000. 5 f. Acquisition of 5 acre site for construction of a park in the Tenth Street Demonstration Neighborhood. Timing of project to occur in multi-year phases, from Calendar Year 1997 through 1999. Estimated cost up to $750,000. depending on the ultimate improvements chosen. g. Widen and install curb, gutter, and sidewalk on Esplanade Avenue, between the existing Stater Bros. Shopping Center and Hewitt Street. Timing of the project, Fiscal Year 1994/1995. Estimated cost $225,000. h. Main Street infrastructure improvements, including landscaping, lighting, and American with Disabilities Act access improvements. Estimated timing of the project, Fiscal Years 1996/1997 and 1997/1998. Estimated cost $250,000. Widen and install curb, gutter, sidewalk, and median at the intersection of Sanderson Avenue and the Ramona Expressway, and participate in the construction of related flood control improvements in this area. Estimated timing of the project is phased from Fiscal Year 1996/1997 through Fiscal Year 1998/1999. Estimated cost $1 ,000,000. 2. Miscellaneous Projects a. Installation of various traffic signals. Potentially located as follows: 1. State Street and Cottonwood Avenue 2. Hewitt Street and Commonwealth Avenue 3. San Jacinto Avenue and Commonwealth Avenue 4. Seventh Street and Santa Fe Avenue 5. Main Street, Ramona Boulevard. and San Jacinto Avenue (Five-Points) Estimated timing of project is undetermined; installation of individual traffic signals will vary based upon warrants. Estimated cost $600,000. b. Provide commercial rehabilitation loans to downtown merchants for rebuilding or construction of store fronts. This is an ongoing project, and funds will be dispersed throughout the implementation plan cycle. Estimated cost over 5 years $250,000. 6 c. Provide business development loans and grants to allow businesses to locate, expand and increase employment opportunities. This is an ongoing project, and funds will be dispersed throughout the implementation plan cycle. 3. Potential Projects These are potential private development assistance projects, where the date and extent of assistance could only be determined after negotiation with respective property owners. a. Sidewalk along Seventh Street between Santa Fe and San Jacinto Avenue. Also install sidewalk along the west side of San Jacinto Avenue, just south of Seventh Street (in front of existing Sav-You- Foods shopping center). b. Assist with the restoration of the Vosburg Hotel, including the provision of or reconstruction of adjacent infrastructure. 4. Housing Projects Provide for quality low and moderate income housing for the community. Due to the low fund balance and tax increment generation rate of the Soboba Springs Project, the housing funds from the both project areas have been combined to provide a more comprehensive housing strategy. A section to follow will discuss the overall City housing strategy, addressing both project areas. Soboba Springs Redevelopment Project The Redevelopment Implementation Plan proposes the following projects for the Soboba Springs Redevelopment Project Area: 1. Circulation Improvement Projects Construct a bridge across the San Jacinto River at Lake Park Drive, including any necessary roadway extensions. Estimated timing of project, Fiscal Year 1996/1997. The estimated timing is predicated upon the City receiving substantial grant monies to match the Agency contribution. Estimated cost $3,500,000. 7 2. Housing Projects Provide for quality low and moderate income housing for the community. As stated previously, housing funds from the Soboba Springs Redevelopment Project Area have been combined with those from the San Jacinto Redevelopment Project Area to provide a more comprehensive housing strategy for the entire City. The section to follow will discuss the overall City housing strategy, addressing both project areas. Please note, the projected expenditures noted above for both project areas far exceed the amount of projected tax increment for the next five years. As a result, the Agency will utilize funds for the targeted activities from a variety of sources, including carryover of unexpended funds from previous years, proceeds from bond sales, federal and/or state grant monies, and recapture of agency expended dollars from repayment of loans and other construction. VII. HOUSING Compliance Plan Since the adoption of the two Redevelopment Project Areas, 854 dwellings have been constructed in both Project Areas. Based upon Health and SafetyCode Section 33413, 128 of these units are required to be income q restricted by some form of covenant, regulation, or agreement. In addition, a total of 51 of these units must be available to, and occupied by, persons or families of very low income. To date, 143 dwellings have been income restricted as required above, and 55 of these units are occupied by persons of very low income. It should be noted however, that while the law requires formal income restricted units, the great majority of housing in San Jacinto is priced at very affordable levels. New and previously occupied single family dwellings can be purchased at prices ranging from $79,000 to $120,000. Based upon the County median income for a family of four of $42,300, both low ($33,850) and moderate ($50,750) income families would qualify to purchase homes at these prices. Rents in the City range from $325 for a one bedroom apartment, $400 for a 2 bedroom duplex, and $550 for a 3 bedroom home. These rents are at a rate that very low income persons ($14,800) and families ($21 ,150 ), spending one-third of their gross income on housing, can afford. 8 Five Year Housing Development Projections Private Sector Development Projects During the next five years, it is anticipated that private development will generate the construction of about 300 dwellings in the two project areas. Based upon Redevelopment law, 45 of these units shall be income restricted. Eighteen of these new units must be available and occupied by very low income residents. Deed restrictions or an acceptable agreement format will be utilized to ensure the appropriate number of dwellings are reserved as affordable units. Public Sector Development Projects Calendar Year 1995 - Projected Tax Increment = $305,000 1 . Brown/Second Streets Demonstration Neighborhood Complete the Brown/Second Street Neighborhood with construction and sale of 3 new residential units. These units are all detached single family units and will range in price from $59,000 to $69,000. All of the units will be income restricted via an agreement with the future property owners and deed restrictions. Estimated cost $175,000, with a HOME grant subsidy of $150,000. 2. Jordan Street and Shaver Street Acquire, renovate, and convert five units of a dilapidated 15 unit apartment complex into three detached single family units. The units would be sold in the $49,000 to $59,000 price range. All of the units will be income restricted via an agreement with the future property owners and deed restrictions. Estimated cost $255,000, with a HOME grant subsidy of $110,000. 3. 640 S. Jordan Provide a loan to the property owner for the rehabilitation of an existing 13 unit apartment complex. An agreement with the property owner shall be required so that at least 5 of the units shall have restricted rents. Estimated cost $75,000. 9 Calendar Year 1996 - Projected Tax Increment = $314,150 1 . Third Street and San Jacinto Avenue Construct 6 new single family detached dwellings, and install infrastructure improvements as noted above under San Jacinto Redevelopment Plan infrastructure improvements. The units would be sold in the $59,000 to $69,000 price range. All of the units will be income restricted via an agreement with the future property owners and deed restrictions. Estimated cost $430,000. Please note, that a $90,000 HOME grant was used to purchase the property. Calendar Year 1997 - Projected Tax Increment = $322,325 1 . Tenth Street Demonstration Neighborhood Begin Tenth Street Demonstration Neighborhood project. Property acquisition, private home rehabilitation loans and grants, and infrastructure improvements as noted above under San Jacinto Redevelopment Plan infrastructure improvements. Subsidize the construction of three new detached single family homes. All of the units will be income restricted via an agreement with the future property owners and deed restrictions. Estimated cost $165,000. 2. Jordan Street and Shaver Street Acquire the remaining 10 apartments of the dilapidated 15 unit apartment complex. Renovate and convert 5 of the 10 units into three detached single family units. The units would be sold in the $49,000 to $59,000 price range. All of the units will be income restricted via an agreement with the future property owners and deed restrictions. Estimated cost $355,000. Calendar Year 1998 - Projected Tax Increment = $330,856 1 . Tenth Street Demonstration Neighborhood Completion of the Tenth Street Demonstration Neighborhood project. Construction of new streets throughout the neighborhood, including curb, gutter, and sidewalk, and a 5 acre park. Subsidize the construction of four new detached single family homes. All of the units will be income restricted via an agreement with the future property owners and deed restrictions. Estimated cost $300,000. 10 Calendar Year 1999 - Project Tax Increment = $339,560 1. Jordan Street and Shaver Street Renovate and convert the remaining five dilapidated units from the original 15 unit apartment complex into three detached single family units. The units would be sold in the $49,000 to $59,000 price range. All of the units will be income restricted via an agreement with the future property owners and deed restrictions. Estimated cost $155,000. Miscellaneous Programs 1 . Residential Loan/Grant Program This is an on-going project that provides for combination loans and grants to a maximum of $5000 for both owner occupied and rental dwellings. Interest and term of the loans vary based on income level. Very low income households are eligible for deferred loans, where the loan is only due upon the sale, transfer or refinancing of the unit. Low income households are eligible for no interest loans payable over a 10 year term. Moderate income households are eligible for loans at 3 percent interest, with the same ten year term. Rental rehabilitation loans are available at low interest rates (about 7%), and the rental owner would be required to offer rents within the very low and low income rental guidelines. Estimated cost over 5 years to be $200,000. • 2. Down Payment Assistance/2nd Trust Deed Program This on-going program would assist first-time home buyers by providing part of the down payment for home purchases. The maximum amount of an Agency 2nd trust deed would be $7,500. Estimated cost over 5 years to be $337,000. Please note that the projected expenditures do not correspond to the projected tax increment during any one year. This is due to the fact the funds for the targeted activities are to be provided from a variety of sources, including carryover of unexpended funds from previous years, proceeds from a tax exempt housing bond, HOME grant monies, and recapture of agency expended dollars from repayment of loans and home construction. 11 VIII. ALLEVIATION OF BLIGHTING CONDITIONS The Agency proposes the implementation of the projects noted above to provide a comprehensive program to stimulate new development and property rehabilitation in each of the project areas. The programs detailed above include: 1. Acquisition of land adversely impacted by irregular parcelization. 2. Rehabilitation programs to improve the City's stock of low and moderate income housing. 3. Construction of buildings and infrastructure. 4. Programs to rehabilitate old or obsolete structures to accommodate modern uses. 5. Enhancing the business community and community economic base. Successful implementation of the above projects will result in expanded economic activity in the City and the project areas. Such activity will increase the number of local employment opportunities, expand the City tax base for the support of essential services, and reduce the costs to the community in providing such services. In addition, implementation of the above projects will alleviate detrimental physical conditions, including the need for re-parcelization, replacement of deteriorating and dilapidated land uses, and providing the needed public improvements for both project areas. H.1RDA1R DAIM PL2.PLN • 12