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Home My WebLink AboutSWP272711(5) C �: = CITY OF RENTON � : Planning/Building/Public Works Department Jesse Tanner,Mayor Gregg Zimmerman P.E.,Administrator. September 3, 1997 Bill Ward, P.E. Seattle City Light 700 Fifth AVE- STE 3536 Seattle, WA 98104-5031 SUBJECT: PROPOSED DRAINAGE PROJECT RENTON VILLAGE,RENTON,WA Dear Mr. Ward: I appreciated the opportunity to meet you at the recent Oakesdale Extension coordination meeting. As I discussed with you after the meeting, I am currently looking at alternatives to solving a flooding problem in the Renton Village Shopping Center and vicinity. The Renton Village Shopping Center is generally located between I-405 on the south, SW Grady Way on the north, Talbot Road South on the east(SR-515), and SR-167 on the west (see the attached vicinity map). The drainage project would involve work under Seattle City Light transmission lines crossing Renton Village. I have enclosed a summary of the project along with drawings of four preliminary alternatives to solving the flooding problems with the transmission lines shown on the drawings. The transmission lines are well above ground level and should not be affected by the work. However, there is a support tower for the lines near the proposed work. Specifically, the work would include excavation and installation of a retaining wall along the channel south of the tower. A large diameter pipe or open channel would also be installed to the east of the tower. I would appreciate your input regarding the potential impacts of the proposed alternatives; as well as any as-built record information you may have on the tower. Although I do not think that vertical clearance is a problem, it would also be good to know what clearance is required between the overhead lines and any construction equipment. Thank you for your assistance. I will contact you next week to discuss the alternatives and answer any questions you may have. I may be reached at(425) 277-5547 if you wish to contact me. Sincerely, <7 �u Scott Woodbury, P.E., Proj ct Manager Surface Water Utility H:DOCS:97-780:S W:ps Attachments CC: Ron Straka 200 Mill Avenue South - Renton, Washington 98055 41M - :; f l SL — k 1 ti„ .....: ......... .yi '6,K K.sSFflNCSOl. \_ t-- . � —.r"•�`—�'�' �{:�• �1, :,fie. j--':.! � ;r-:.. . t '`�rT a ,.,>,e•e,i — } � —.�r•...idv" 'Sf"��1 is >., _�S rt.s�Sl� ��w..—;J; .:._ �W ILA --.. _-• � —� _ �---�..— _ --- ,—�-�'=-,�'//Y,;-. _._.. O �. r—._•._� KEN, f- i ,—�•= �... sr ri N r® - I VICINtry Is e NO rCAA R�tiT-O�J V(C AVE City of Renton Renton Village Hazard Mitigation Grant Application Project Summary: Replace approximately 540 feet of 42- to 48-inch diameter storm drainage piping pipe with a new channel and/or 72-inch diameter pipe or equivalent box culvert and deepen and widen approximately 670 feet of drainage channel. Location: Renton Village Shopping Center generally located between I-405 on the south, SW Grady Way on the north, Talbot Road South on the east (SR-515), and SR-167 on the west. Estimated Project Cost: Varies by alternative Description of Flooding Problems: The Renton Village Shopping Center experiences frequent and severe flooding due to a lack of capacity in the storm drainage trunk system conveying Rolling Hills Creek through the shopping center site. The tributary area to Rolling Hills Creek at the shopping center totals approximately 800 acres comprised primarily of commercial and residential development. The drainage system through Renton Village (shown in the figure attached to the enclosed cover letter) includes a 540-foot section of 42- to 48-inch piping fed by a 72-inch line coming in from the east. The section of 48-inch pipe outlets into a 670-foot long section of open channel which conveys flows to a 48- inch culvert and 132-inch culvert through I-405. Flows eventually reach Springbrook Creek to the west of Renton Village. The reduction in conveyance system size from a 72-inch to the 42- and 48-inch pipe causes runoff to surcharge out of the system, flooding Renton Village and the surrounding area. The last 190 feet of the 48-inch pipe is at a significant reverse grade, further restricting the pipe's ability to convey flows. Also, the conveyance capacity of the open channel segment downstream of the 48-inch pipe is restricted by the channel's shallow slope and narrow width. The lack of capacity in the 48-inch "bottleneck" and downstream channel creates severe flooding problems. Water levels have reached depths of several feet in the parking lot south of the SW Grady Way and Shattuck Avenue intersection, as illustrated in the attached photograph of the November 1990 flood. Flood waters also have completely ponded over the major thoroughfares of SW Grady Way and Talbot Road South (SR-515). The flooding over the streets impacts the ability of traffic, including emergency vehicles, to reach Renton Village and other destinations and has even resulted in complete closure of Talbot Road South. Problem Solution - Description and Cost Estimate: The proposed solution is to replace approximately 540-feet of 42- and 48-inch diameter pipe with a new channel and/or 72-inch diameter pipe or equivalent box culvert and deepen/widen the 670 feet of channel downstream of the existing pipe replacement. Four preliminary alternatives have been identified to address the flooding problems as described briefly below. It is important to note that the entire reach of Rolling Hills Creek affected by the project alternatives currently require a high level of maintenance to maintain system capacity. The proposed improvements should lessen the need for maintenance, but a relatively high level of maintenance will still be needed because of the shallow gradient of the reach. NO TES: 1. TOP OF THE ROCKERY/REINFORCED EARTH WALL TO HAVE REMOVEABLE PEDESTRIAN/VEHICULAR GUARD RAIL TO i FACILITATE MAINTENANCE. k 2. A TOTAL OFF IS PARKING STALLS WOULD 89�ELIMINATED. PA YLE COMPL EX L L END: z TNTo UR INTERVAL 5,/1/64' (0.5 ME TET - THRIFTWAY, REINSTALL 48- CONC. TO SLOPE TO SOUTHEA • Ali cxIstI.G$s- X. gj, xIst no EXIS11w,IV REP-- IHG SS z "(1811.11.)3 -AEPCAC EX. 144' MAN Ic 11�1 I 5 ANN L W/DEE ER 144*M L 00 C ISTING 144-$DW Z I.E.08:11 (to" ENTON VILLAGE LACE� DE mx�-'38- f A OX. PARCEL/RIGHT-OF- LINE(TYP) i&KOGR D PIICit -i EVERGR N\ !PE --Z7—N1\,,',STORM,1M'ANH?LE BLDG. BEND k(TYP F? iJ Isitt SIP.. --------------- IX. 18.el, ILL EXISTING PIPE it RENTON )e.r Er EXIST 6B,TO CHANNEL ITH CONCRETE I i , 'PLACE ONE,. RdCKER EINF R ED RENTON R STORE 180'0 1 1 ,'EARTH WAL NO OPCHANNEL RESTORE '80 CINEMA E. EACH SIDE OF MANNEI y. C1 0 Rt-EL Z— ROCKERY/REINFORCED EARTH WALL ALONG -1c I,ji., Cc,W COK ecle 2t. -&ROLLING HILLS--CP -405 RIW NOTES:\ , I 1. TOP OF THE ROCKERY/REINFORCED EARTH WALL TO HAVE i /' REMOVEABLE PEDESTRIAN/VEHICULAR GUARD RAIL TO FACILITATE MAINTENANCE. 2. A TOTAL OF, 18 PARKING STALLS WOULD BE,ELIMINATED. PAYLESS i !, COMPLEX I W w L� END: C NTOUR INTERVAL �/1.64' (0.5 METE�i), 4' -- /' O�ulsnr.c L:7;7 i� /� -.., `•-..\ ti•, '/ I; THRIFTWAY j _I, •. .. \ .-. __ I 92- TO REMAIN TINT SERVICE r � [xlsrlr.G ss rlw ,� CxlSll[.G IS a; �� .I Bf spw<- t ' RIh �9.6J � g j _ Rf rx Z txssrtm n aR— ., '� ��,: `�\`\ � c/ .. gyp. �•'----' � a +�` ...�__ i ae• .tau ss _ e•ss [ 4. NTON VILLAGE VA GF_ A O.K. PARCEI/RIGHT•OF• LINE ITYPI _ - < YI 1\ \\,� \\\\ ^ f /„� •.` ,,, __ � r/ .I 'N n,•'\,'_ _._..i/_._ Y,` �= yw xcxoixo vovice� •- EVERGRE \ _ . .___._,_._.,.._.,_ /x• / N 5N X QW CONC, BOX \\� BLDG. 1 /� ,• / _ ! [A�• ••_l� O �yL1A` CQNC.PIPE 1325'7O7�L) \` •' \ \ .. •..(`.... I.E.•less/ "�I NEW STORM+MANHOLE'"1 1 A \1 �' / f ,. ', I 1 I FILL EXISTING PIPE RENTON 1 j I \ \\\\ • ` ( I r--- _, \ U ET EXIST CB--TO 'EW CHANNEL I 1 WITH CONCRETE 1 PLACE I I \ �\•\ \....�_.,... _...-' � ,� ail ONE. I �,..._.- ..__._ ,.._... RENTON '. ROCKER EINFORCED /•- RESTORE 180'O I I EARTH WA ALONG - 1--'l1I 1 II CINEMA --•� OPEN CHANNEL EACH SIDE O NEL I1 � ' I I / cHaN I \\ �\�••�.�\ ' ROCKERY/REINFORCED -1 I x Cs RE EL 262J I 1 1 r "... I��-^'---'--- L ..,. ... ' j� iM WALL ALONG T I � t '� _. ...........__... ., ..-.— EAR x ' c _ yy J2z 9Y.._. _.. _ _ i ..• _ \�� ... ... �-�_._.... :--` ••L`!RIw.26..2l\ . •Y'�. i'a.r•YiT�"_..,y 2s.a_ \16_I9A..*26�/1 C i//' _ �i/r \ -.. ;_ - -u,C;1,Iza s �3' ,-". �m lc�T�---' •6 _— `�7•r '�"�� 4'�0.' - .. - - "_r_ ..�'•+� / tea' _, 2Li _ DE _.., -AROL LS-CREEK � - C I'd O /A W __•_-- �\� I4-1 NOTES.\ 1. TOP OF THE ROCKERY/REINFORCED EARTH WALL TO HAVE REMOVEABLE PEDESTRIAN/VEHICULAR GUARD RAIL TO t FACILITATE MAINTENANCE. PAYLESS COMPLEX 0 ....... ... . .......... 5 D Ui L)FIGEND: zCONTOUR INTERVAL r"1.64' (0.5 METER)' Li 0 THRIFTWAY REMAp;W 42' TO ms I% IN 41. IN'SERVI CE Eli%m ss rxisim it-*cp f" % CXISTI�SS L h 13 t (18-1-11.33 CX12TING 144'T" roAs I,cit ss 19• s F NTON VILLAGE C A ROX. PARCEL/RIGHT-OF. Y LINE (TYP) jx.m o PmR EVERGR BLDG. aF 0 !.PIPE 67f X CR�!S�W COMO. 1211-TO LI le/ 1 25 E� ME srO41,MANHOL r III__j N i` I�1 \ i '1 1 RENTON ILL EXISTING PIPE I ---------- I I i , t T MANHOLE WITH CONCRETE W1 48: ONC. PIPE 'PLACE iiln ONE, r RENT ON CINEMA EX Cl EL ROCKERY/REINFORCED EARTH WALL ALONG ......... FT PARKING LOT f650'.-T6Ty1 F! 4 Ir EX. ' �^r __...fe as.to.2 "w ar s' y-r-.aT�t.�, �]b. �li N\ 98 ao -n 311. • kL 4oS Ft/W ........... 4=oeW_l �AOL 1�G L S_CREEK--�t 4'RCITY OF RENTON � Planning/Building/Public Works Department Jesse Tanner,Mayor Gregg Zimmerman P.E.,Administrator September 3, 1997 Bill Ward,P.E. Seattle City Light 700 Fifth AVE- STE 3536 Seattle, WA 98104-5031 SUBJECT: PROPOSED DRAINAGE PROJECT RENTON VILLAGE,RENTON,WA Dear Mr. Ward: I appreciated the opportunity to meet you at the recent Oakesdale Extension coordination meeting. As I discussed with you after the meeting, I am currently looking at alternatives to solving a flooding problem in the Renton Village Shopping Center and vicinity. The Renton Village Shopping Center is generally located between I-405 on the south, SW Grady Way on the north, Talbot Road South on the east(SR-515), and SR-167 on the west(see the attached vicinity map). The drainage project would involve work under Seattle City Light transmission lines crossing Renton Village. I have enclosed a summary ,of the project along with drawings of four preliminary alternatives to solving the flooding problems with the transmission lines shown on the drawings. The transmission lines are well above ground level and should not be affected by the work. However, there is a support tower for the lines near the proposed work. Specifically, the work would include excavation and installation of a retaining wall along the channel south of the tower. A large diameter pipe or open channel would also be installed to the east of the tower. I would appreciate your input regarding the potential impacts of the proposed alternatives, as well as any as-built record information you may have on the tower. Although I do not think that vertical clearance is a problem, it would also be good to know what clearance is required between the overhead lines and any construction equipment. Thank you for your assistance. I will contact you next week to discuss the alternatives and answer any questions you may have. I may be reached at (425) 277-5547 if you wish to contact me. Sincerely, <2f � vj'jtvm� Scott Woodbury, P.E., Proj ct Manager Surface Water Utility H:DOCS:97-780:S W:ps Attachment CC: Ron Straka 200 Mill Avenue South - Renton, Washington 98055 mThis paper contains 50%recvcled material.20%oost consumer 1 r � 1 n i < o, `Li'KG KASKFhSCTdl. 1.. .- - F VN - - 1 I �. •`\'�`^<y — —�.--.Sv St� WILA � .._� � '�;• �, d � � � ,. •\�` .,gig . !/ ,,.� �..�- KE '- p� i ' { - A'�•7'//F.HII.AAF. • ,)I�f�17S GYP) or RENrON VICINII- NO rCAL ROJTOrJ V(LC ACE PA(NAVF. I^nofioylirynErJTS City of Renton Renton Village Hazard Mitigation Grant Application Project Summary: Replace approximately 540 feet of 42- to 48-inch diameter storm drainage piping pipe with a new channel and/or 72-inch diameter pipe or equivalent box culvert and deepen and widen approximately 670 feet of drainage channel. Location: Renton Village Shopping Center generally located between I-405 on the south, SW Grady Way on the north, Talbot Road South on the east (SR-515),and SR-167 on the west. Estimated Project Cost: Varies by alternative Description of Flooding Problems: The Renton Village Shopping Center experiences frequent and severe flooding due to a lack of capacity in the storm drainage trunk system conveying Rolling Hills Creek through the shopping center site. The tributary area to Rolling Hills Creek at the shopping center totals approximately 800 acres comprised primarily of commercial and residential development. The drainage system through Renton Village (shown in the figure attached to the enclosed cover letter) includes a 540-foot section of 42- to 48-inch piping fed by a 72-inch line coming in from the east. The section of 48-inch pipe outlets into a 670-foot long section of open channel which conveys flows to a 48- inch culvert and 132-inch culvert through 1-405. Flows eventually reach Springbrook Creek to the west of Renton Village. The reduction in conveyance system size from a 72-inch to the 42- and 48-inch pipe causes runoff to surcharge out of the system, flooding Renton Village and the surrounding area. The last 190 feet of the 48-inch pipe is at a significant reverse grade, further restricting the pipe's ability to convey flows. Also, the conveyance capacity of the open channel segment downstream of the 48-inch pipe is restricted by the channel's shallow slope and narrow width. The lack of capacity in the 48-inch "bottleneck" and downstream channel creates severe flooding problems. Water levels have reached depths of several feet in the parking lot south of the SW Grady Way and Shattuck Avenue intersection, as illustrated in the attached photograph of the November 1990 flood. Flood waters also have completely ponded over the major thoroughfares of SW Grady Way and Talbot Road South (SR-515). The flooding over the streets impacts the ability of traffic, including emergency vehicles, to reach Renton Village and other destinations and has even resulted in complete closure of Talbot Road South. Problem Solution- Description and Cost Estimate: The proposed solution is to replace approximately 540-feet of 42- and 48-inch diameter pipe with a new channel and/or 72-inch diameter pipe or equivalent box culvert and deepen/widen the 670 feet of channel downstream of the existing pipe replacement. Four preliminary alternatives have been identified to address the flooding problems as described briefly below. It is important to note that the entire reach of Rolling Hills Creek affected by the project alternatives currently require a high level of maintenance to maintain system capacity. The proposed improvements should lessen the need for maintenance, but a relatively high level of maintenance will still be needed because of the shallow gradient of the reach. NOTES:',, r TOP OF THE ROCKERY/REINFORCED EARTH WALL TO HAVE REMOVEABLE PEDESTRIAN/VEHICULAR GUARD RAIL TO FACILITATE MAINTENANCE. PAYLESS COMPLEX t; Fmmss 304II Ell: LU LL-6END: _j JONTOUR INTERVAL z,11.64' (0.5 METE�)__. N, EXISTING SS M 'J r THRIFTWAY A i I PORTION OeEXISTING 42- _)IN VICE 'o TO REMAININ BE EXISTING SS NN EXISTING SS NN L RIN-29A3 EXISTING 7V kCP— I.E.110-1 17.33 z EXI TING 144-S" SL IT 1 zoio\ IZ t 25 IL.�111-c- .Ia 75 SS I.:SS VILLAGE' 0% IGHT-OF-W LINE(TYPI Z_l� '\PAR.CEL/1.1 EV EVERGR W STORM" E MANHO BLDG. -AMQ-C.ONNLPCT t 0 SEND (TYP P AC S WER CROSSIN ATD IN T E D IN z MING SI_ AVOID CONFLI I,G EXEI STING *WE4t-Cq WHILE ALLOWING FPER ST R IN(COMPARED WITH ALT.01 ILL EXISTING PIPES REN70N C ISTING CS T EW ON TH CONCRETE III 'PLACE ONE 7— RENTON d-W CONC. BOX CINEMA ORE 'SD'IA. ONC. PIPE (550'TOTAL) 7 EX ED PIN EL-26.23 ROCKERY/REINFORCED I e ILL ALONG P ILL! EARTH WA -----------lL_ .......... 1-Z NN" m V N 1-405 RIW •ROLLING HILT CR m,�13 c [111IR k I I I I ITTT 1. TOP OF THE ROCKER YIREINFORCED EARTH WALL TO HAVE ` ' 1. TOP OF THE ROCKERY/REINFORCED EARTH WALL TO HAVE REMOVEABLE PEDESTRIAN/VEHICULAR GUARD RAIL TO FACILITATE MAINTENANCE. t 1�d ` ; 2. A TOTAL OF 1S PARKING STALLS WOULD BE,ELIMINATED. PAYLESS v COMPLEX ' W W 5 W L 6END: 5 CJNTOUR INTERVAL /1.64' (0.5 METE ),• . .• o ¢ I / \ /' / ! Cnsnnc ss nn THRIFTWAY' _ r. n xs.46 EXIST 42' TO tr�+ tf�w�':GISTI.0 x•spx'°��REMAIN IN SERVICE ? � �1[ A"; , II [nlSrinc ss h« L__—` — )c:csrwc 2z•acr— aF E ( '� `\ - 1_ i UIUIK 144•1" E+ q` 1/ '� \,.�`.� �• 1 RIn 2880 ' w i i .6 ' / � \ � -- I[ne•[-�,.>p.rs r� . ...._ 1 ne•3.zacs \'�\t�3\'\ S�4-bl�•� �� -_._ t ' `y— le•ss=�-- _ le•ss' 4 :.. T7'ON VILLAGE, LA ?\\\\. \ Z` j ku AP,"ox. PARCEL/RIGHT-OF• LINE(TYP) G sl t \ \ -_ \ EVERGREEN\ _ -- — TT \ ? SLOG. ` /' - ..._ `Ct-- —___ _. * /� NEµyy115H X 6W CONC.Bppx iyz \ i 1 �dF' �--"\ O�ayb1A. C' NC.PIPE(325'T�T�L1 — I, L •1ZA NEW STOR!11•.MANHOL ES) d _ t •1 is Iit` I ! T ET EXIST GAB—TO W CHANNEL 1 \` WITH CONCRETE EXISTING IPE III ,— I I I �+ 1+ 1 t \\ \PLACEN I 1 I I ! EAR EI O FO A Y Q \ \ `,,.Y•----------- - RENTON RESTORE 180'O 1 1 ,/EARTH WA ALONC CINEMA `-—d OPEN CHANNEL 1 d 1 / EACH SIDE O CHANNEL ROCKERY/REINFORCED [ n n•26.23 1 /' ` I I EARTH WALL ALONG i I I[ _ Q rT i .. B� M.�y 2 , \ at n 3CC r 9T /• .- .- ,EN JiNOrWIDE 70 — `.. EJ RIW - .,1. 4O_.. �� rQF�ROI-LING HILLS_.CREF�•—•___ —�---' � -�4 �ra0. t.AITTI G/�( 4 NOTES:,, 1. TOP OF THE ROCKERY/REINFORCED EARTH WALL TO HAVE REMOVEABLE PEDESTRIAN/VEHICULAR GUARD RAIL TO FACILITATE MAINTENANCE. � r i PAYLESS qq COMPLEX 0 cc Lu L�GEND: CONTOUR INTERVAL /1.6 4' 10.5 METER) 0 THRIFTWAY EXISTIN T may. G S$ NNN IST 42' TO CI 1311,2a 9U 19,01- REMAIN 111, 1, IN SERVICE EXISTING SS m EXISTING IS NN EXISTING?r C. 17.33 z 00 EXISTING 144-S" tti.1-1 I.E. X I Aq it It. M Ts 2- A ROX. PARCEL/RIGHT-OF- LINE(TYP) 16 EVERG EN BLDG. 74 x �v BOX 01C a 515'TO I DIA- TO I,� \ ' r [ST -----L It. 112$1 NEW STOAA-,MANHOL,4. )II L EXISTING PIPE �, �1 , \ RENTON c?N ECT TO PLACE NE�V-ST8. MANHOLE DIN CONCRETE V�/ 41 ONC. PIPE ONE RENTON CINEMA 2 KERYIREiNFORCED E.C. EL ARCTH WALL ALONG --—--------I— Lf E C. E�Is-CONE RUT 12')y- 190 le 1 405 .......... R/w 7-- - 'RiWO. -11 ROLLING HlL�CRSSK- ... ....... ;s CITY OF RENTON .d1 Planning/Building/Public Works Department J e Tanner,Mayor Gregg Zimmerman P.E.,Administrator March 14, 1997 Bill Huntington Central Puget Sound Economic Development District New England Building 219 First Avenue S., Suite 305 Seattle, WA 98104 SUBJECT: REQUEST FOR ECONOMIC DEVELOPMENT DISTRICT ASSISTANCE RENTON VILLAGE FLOODING PROBLEMS Dear Mr. Huntington: Thank you for your willingness to meet with us to discuss our flooding problems at Renton Village and SW 43rd Street. A vicinity map showing the general location of these problems areas is attached. We were encouraged when you informed us that the Economic Development District has in the past made funds available for flood hazard mitigation projects that provide protection for properties suffering economic losses from flooding. We appreciate the opportunity to submit the attached grant assistance proposals for the Renton Village and SW 43rd Street flooding problems. We believe that each of these problems pose a significant economic impact that if unaddressed will continue to result in damage and loss to affected businesses and may ultimately lead to the businesses relocating out of the City. Thank you for your assistance in seeking grant funding for these projects. We look forward to working with the Economic Development District in addressing these important problems. If you have any questions, please do not hesitate to contact me at(206)277-5548. Sincerely, Ronald J. Straka, P.E., Engineering Supervisor Surface Water Utility H:DOCS:97-238:S W cc: Ron Olsen Enclosures 200 Mill Avenue South - Renton, Washington 98055 N RE TON op / aA toN a South Renton Subbasln Pumping Station ' / BasiniStudy Area Boundary olling� \• sw,sm St. Hills �rl�� •�_ i Dran a I Rolling Hills ` o i i •� Subbasln I 0l •` P-9 CAanrwl G f i 181 Panther Creek Valley Sub Wetland Valley TO Sw uh SL •�w ?A6 40 l� SW AW St •, Panther Creek Subbasln I 167 8 1 5., S ' LEGEND ` ••� '� %� brookrin------ Stream/Drainage Channel �,"� S P g Springs -------------- Storm Drain Pipe a �\ Subbasln Subbasin Boundary 0 1000 2000 3000 ;\ SCALE IN FEET 1 Black River Basin Water Quality Management Plan VIC/01r4-- --AAAAP City of Renton Economic Development District Assistance Request No. 1 Renton Village Shopping Center Project Summary: Replace approximately 540 feet of 48-inch diameter storm drainage piping with a new 72-inch diameter pipe or equivalent box culvert and deepen and widen approximately 630 feet of drainage channel. Location: Renton Village Shopping Center generally located between I-405 on the south, SW Grady Way on the north, Talbot Road South on the east (SR-515),and SR-167 on the west. Estimated Project Cost: $500,000 Local Match Sources: Potential local match sources include utility rates, local improvement district funds, basin surcharges, and others. Description of Flooding Problems and Impacts to Businesses The Renton Village Shopping Center experiences frequent and severe flooding due to a lack of capacity in the storm drainage trunk system conveying Rolling Hills Creek through the shopping center site. The tributary area to Rolling Hills Creek at the shopping center totals approximately 800 acres comprised primarily of commercial and residential development. The drainage system through the shopping center complex shown in the attached figure includes a 540- foot section of 48-inch piping fed by a 72-inch line coming in from the east. The section of 48-inch pipe outlets into a 670-foot long section of open channel which conveys flows to a 48-inch culvert and 132- inch culvert through I-405. Flows eventually reach Springbrook Creek to the west of the shopping center. The reduction in conveyance system size from the 72-inch to the 48-inch pipe causes runoff to surcharge out of the system, flooding the shopping center complex. The last 190 feet of the 48-inch pipe is at a significant reverse grade, further restricting the pipe's ability to convey flows. Also, the conveyance capacity of the open channel segment downstream of the 48-inch pipe is restricted by the channel's shallow slope and narrow width. The flooding problems created by the lack of capacity in the 48-inch "bottleneck" and downstream channel severely impacts the shopping center complex by preventing customers from visiting the stores. Water levels have reached depths of several feet in the central parking lot of the shopping center, as illustrated in the attached photograph of the November 1990 flood. Flood waters also have completely ponded over the major thoroughfares of SW Grady Way and Talbot Road South (SR-515). The flooding over the streets impacts the ability of traffic, including emergency vehicles, to reach the shopping center and other destinations and has even resulted in complete closure of Talbot Road South. The following is information on the impact of flooding for the two largest stores in the shopping center complex. Unless action is taken to address the flooding problem, the businesses may choose to relocate out of the City. Thriftway Owner: Lee Frasier Daily loss of revenue during flooding: $20,000; last flood exceeded $50,000 Lost wages: $5,000 last flood Jobs threatened if the store is forced to close: 95+ Renton Village Shopping Center Economic Development District Assistance Request No. 1 Page 2 Payless Manager: Russ Whindon Daily loss of revenue during flooding: $13,000 to$15,000 Lost wages: $1,184 last flood Jobs threatened if the store is forced to close: 32(90%are full time) Other losses were likely suffered by the other stores in the complex, adding to the economic impact created by the flooding. Flooding of varying magnitude has occurred 6 times of the last 6 years. Assuming an average of$30,000 a year in lost revenue due to flooding, the total losses for a 50 year period would mount to $1,500,000. Actual flood damages would likely increase over time as development continues in the upstream drainage area. Problem Solution-Description and Cost Estimate The proposed solution is to replace approximately 540-feet of 48-inch diameter pipe with a new 72-inch diameter pipe or equivalent box culvert and deepen/widen approximately 670 feet of channel downstream of the pipe replacement. Replacing the 48-inch pipe would also allow the portion of the existing 48-inch that passes under the corner of the Thriftway store to be filled and abandoned. The estimated cost of installing the replacement piping and increasing the capacity of the downstream channel is $500,000, including all phases of the project from design engineering through construction. Project Benefits The project benefits far outweigh the economic impact that would be suffered if the 48-inch system were not replaced and the downstream channel improved. The cost of the proposed improvements is about 1/3 the cost impact of flooding based on $1,500,000 in estimated damages over a 50 year period if nothing is done (see above) and a 50 year life cycle for the new pipe and deepened/widened channel installed at a cost of$500,000. In addition, annual maintenance costs would also be less for the new system as the new pipe would be installed with a positive grade along its length. Another benefit would be the removal of the 100-year floodplain from the shopping center site. A study of the open channel reach downstream of the 48-inch storm drain bottleneck conducted for the Federal Emergency Management Agency (FEMA) in 1987 resulted in much of the shopping center property being mapped as lying within the 100-year floodplain. However, the study did not include the 132-inch storm drainage culvert through the adjacent I-405 roadway which was installed by the Washington State Department of Transportation in 1989. Removal of the 48-inch bottleneck combined with the previous installation of the 132-inch culvert would make revision of the FEMA mapping possible to remove the shopping center from the 100-year floodplain, resulting in further cost savings to the property owners on their insurance premiums. H:DOCS:97-23 8 a:S W:ps attachment Renton Village Shopping Center Economic Development District Assistance Request No. 1 Page 3 Preliminary Cost Estimate-This is not to be attached to the grant request Description Est. Quant. Unit Unit Cost Total Cost Asphalt Patch 130 Ton $100 $13,000 6' Conc. Pipe 600 LF $300 $180,000 Mobilization 1 LS $20,000 $20,000 Miscellaneous (Dewatering, traffic 1 LS $40,000 $40,000 control, shoring, etc) Subtotal $253,000 Tax, admin, engineering(30%) $75,000 Total $328,900 Add cost for channel improvements $171,100 downstream of the 48" pipe replacement, such as removal of the weir at the 132" culvert and deepening/regrading of the channel upstream. $500,000 H:DOCS:97-238a:S w:ps ....... ........ ............ ...... ..... .............. ..... .. ... ..... 71- ................... ............ Lake . .........................................i . ........................ *Aft >.............. CA 1. m j Shd:t I............- ............ LA U. -4 ........... 0. -o Shattuck Ave:' N* ... ....... OSe.S ... .......... V) ♦ tWhttworth AYe S �"� �Fy;� Vh;Iwort ............... ............... .... ........ ..... ........... .......... A mit4rs Avp?*S Ll th .......... ........... ...... t.N..... ? X .............. .......... ........... ........ .......... ... ....... ........ ,lam, ilMMMMM MIMMISMIllMEMIN F 4t 1.. Yb • .q .I t .. t •. v !v'x f'RJI+ •�P �C yk 4i� rr .�•7frM'4Y . ' F+ ��'4! .i,•sFd . K'F� ,� 'y^ * j h4iSY`lP! j . �,�'9.'x�y �'"!`rC¢�'yl+i'�� '" {!, �•r � �R�'�'„ .Fs, Ja•^uFu'•c+ 'r 7 !t{4 �a�`-��♦y 9�+ t J�. "'x? Ids a A K�F xM+b e4 �' ��t �� s� h !x ��A�J&v� eaF� +t,9'.' r I � � y i✓� b •� r3�; r . r`�Ss +r �.�'� �N��t'..� , �.. .-x.� '"`.�s '"''S'•�Js t..� Y 1 a." 5 {. d 3sd��d...f'� �"�'�.�t�'f.��.,:. 1 n,- •,:. ..,,., rF S. .fix City of Renton Economic Development District Assistance Request No.2 SW 43rd Street Storm Drainage System Improvements Project Summary: Install a new 84-inch diameter storm drain trunk line for a distance of approximately 3,500 linear feet. Location: The new pipe would begin at the intersection of SW 43rd Street and Lind Avenue and extend north along Lind Avenue to SW 39th Street, and then west in SW 39th Street to Springbrook Creek. Estimated Project Cost: $3,100,000 Local Match Sources: Potential City of Renton match sources include utility rates, local improvement district funds, basin surcharges, and others. Other Funding Sources: In addition to requesting Economic Development District Assistance, the City of Renton also intends to pursue other potential funding sources, including the FEMA Hazard Mitigation Grant Program and the City of Kent. Description of Flooding Problems and Impacts to Businesses The existing SW 43rd Street storm drainage system, shown in the attached figure, currently conveys runoff from an approximately 320 acre drainage area comprised primarily of commercial development. The system does not have sufficient capacity to convey the flows that drain to it. The problem portion of the SW 43rd Street system lies downstream of the Lind Avenue intersection. The portion of the system from Lind Avenue to Oakesdale Avenue is comprised of approximately 970 feet of 48-inch pipe and then 1,230 feet of 54-inch pipe. At the Oakesdale Avenue intersection,the 54-inch pipe splits into two systems. One system of about 55 feet of 36-inch pipe and 1,020 feet of 54-inch pipe which extends north along Oakesdale Avenue to outfall into Springbrook Creek at SW 41st Street. The other system includes about 1,400 feet of 36-inch pipe and extends west from the Oakesdale intersection to outfall into Springbrook Creek on the north side of SW 43rd Street. The capacity of the system to convey flow is limited due to the small pipe size and nearly flat slope. High water levels in Springbrook Creek also reduces the ability of the system to convey flow. The lack of capacity results in significant flooding of SW 43rd Street and adjacent commercial developments. Other area streets are also affected by overflows from the SW 43rd Street system. The flooding significantly causes damage to public and private property, disrupts traffic, including emergency vehicle access, and prevents customers from reaching businesses dependent upon the affected roads. Flooding on SW 43rd Street and overflows to other area streets has forced complete closure of the affected streets as illustrated in the attached photograph. Flooding of SW 43rd Street has occurred 5 times in the last 6 years and if a solution is not implemented, could result in affected businesses relocating out of the City. The impact of partial or complete closure is especially severe on SW 43rd Street. SW 43rd Street is a major east-west transportation facility conveying an average of 25,000 vehicles per day and is an important link to other major roads including SR-167, SR-181, and the Southcenter Shopping Mall Parkway. Because of the large volume of traffic, closure of the SW 43rd Street system negatively SW 43rd Street Storm Drainage System Improvements Economic Development District Assistance Request No. 2 Page 2 impacts other major roads it connects to and causes a tremendous loss of income to the businesses not only along SW 43rd Street, but to other businesses on the connecting roadways. Problem Solution-Description and Cost Estimate Improvements to the SW 43rd Street drainage system from Lind Avenue to the outfall at Springbrook Creek are necessary to address the flooding problem. Although several alternatives are possible, the preferred solution that has the least traffic impact to SW 43rd Street is to construct a second 3,500 foot drainage system beginning at the Lind Avenue/43rd Street intersection and continuing north down Lind Avenue to SW 39th Street, and then west in SW 39th Street to Springbrook Creek. Preliminary analysis indicates the new system would need to be an 84-inch diameter pipe. The estimated cost of the improvements is $3,100,000, including all phases of the project from design engineering through construction. Project Benefits The project would resolve existing flooding problems and prevent future flooding problems on SW 43rd Street and other affected areas. Significant cost savings would be realized as flooding related damages to property would be prevented and access to area businesses and other destinations would not be disrupted. H:DOCS:97-238b:S W:ps Attachment 11 SW 2 d 3rd ST S ; 23r.......__ ;j; t ` ca SW 27th ST t SW 27th ST _ :t ------ . w 24* 24 •, r � 3 -- i i fTl •�\ ii � I SW 29th ' ( "--i'•; ✓ vN ``9 SW 34th ST SW 1 '':. ! !'•;o 34th ST w ..........-'-O snt0s `S 36th rj j i 30' SW 39t RR ! _ ! f �.__-------.._._. ; ... •�.�-•:::.=-_:---...._._;....------..—__._ x , � : R is SW 41st ST i SW 4ist ST % o Z D _ Lp ...._..........._.._... P cn r j I 120 ---- — 12,- M pwi r / i1 SW 36 43rd : ST 54 SW 43rd 48 ST r ! ia\ _-._..__.._.__.. _._... t ---... ._.__.. _.....__._...-......_ _- f t-..._...._.._........_ CITY OF KENT i _�, _--��y -a' 45th PL i n SPRINGBROOK ' i r:::.....:_..... m� PkOo'SED SW Y& 4 'S nU&r �ysr0PA DAAWA" /MPAWfilhiMr e ~= 1000 I jr y,ryryer�:f "�i4•ri= 3, �i,,�yp55+�11JyyI' ggttr� 'S7-�'u '..t'M.AA,•M.ys,'`J"t� cf 4, �� t .RZ•L• A ai' w k h'.,.5 Ilim'- ~',y �*?r nq �4�:r*dy ✓!.• .,��Wr'wy 1:y�,;�p��,,,��c;,i Y �3- "'"'"'^"►..c �.yc.. ram•. �.aCyy. - s - Ax y r ♦ R rir. ,.. y r. { �'w+14 pr..jam• _ a _•- h. �: � R- s�• a�#'!�a �.�� . e CITY OF RENTON TELEPHONE/CONTACT RECORD Contacted: Beverly Banker Date of 9/2/97 Contact: Telephone No.: (425) 255-9955 (home) Time: (425) 255-3448 (shop) City of Renton Scott Woodbury File No.: Contact: SUBJECT: Hazard Mitigation Grant Location: Phone Application Items Discussed. Ms. Banker said she has pictures of the flooding in SW 7th Street for the January 1990 flood that were taken from the upper floor of their building at 405 SW 7th Street. She didn't have pictures of any other flooding, not because it hasn't flooded, but because the flooding occurs too frequently to take photos every time. The building at 405 SW 7th Street was constructed in 1964 or 1965. The flooding has not reached the floor of the building, but has come close (within 6" depth). However, waves from vehicles driving through the flooded street have reached their building. Ms. Banker didn't have any damage information for the building on their property, but thought that flooding in January 1990 may have damaged the autos stored by Renton Auto Wrecking on the south side of the building at the time. Renton Auto Wrecking is no longer is business, but she gave me the phone number for the former owner (Lee Hock, 425-226-8364). Fill was placed south of the building in about 1994 so flooding in that area will not occur to the depths it did in 1990. A-1 Auto adjacent to the Banker site has been in business for 15 years. They may have information on flooding levels and related damages. Recommended Follow-up: cc: 09/02/97 CITY OF RENTON TELEPHONE/CONTACT RECORD Contacted: Ron Lynch Date of 8/27/97 Thriftway Contact: Telephone No.: 226-2830 Time: City of Renton Scott Woodbury File No.: Contact: SUBJECT: Hazard Mitigation Grant Location: Phone Application Items Discussed. Ron said he would not be attending the public meeting. He said there has been little or no damage to the $2,000,000 building or its contents ($600,000 in inventory) due to flooding. However, damages are on the order of $10,000 per day in lost wages and revenue. Ron did not have any preference on which alternative to pursue provided whatever is done solves the flooding problem. Recommended Follow-up: cc: 08/29/97 CITY OF RENTON PUBLIC MEETING ALTERNATIVE SOLUTIONS TO THE RENTON VILLAGE FLOODING PROBLEM AUGUST 27, 1997 ATTENDANCE RECORD Name Affiliation Address Phone 1 l�rh��n� Tarr Txuc Ss's' S•�y p� Z��- y �1 7 7 u L CITY OF RENTON Community Services MEMORANDUM Date: August 26, 1997 z To: Scott Woodbury, Surface Water Utility AI/G 2 ciTy 8 O i9sj From. Leslie Betlach, Parks Director, EngineeF g�NTON Re: Renton Village Flooding Problem Opt I have reviewed Gregg Zimmerman's August 25, 1997 memorandum on the above referenced subject. My comments are as follows: • Alternate A appears to be the best and most cost effective solution to the flooding problem. • Community Services does not have any new or additional information to provide for consideration. If you have any questions, please call me at extension 5549. LAB/dlf cc: Sam Chastain, Community Services Administrator 97-461 DF.DOC Washington State Northwest Region Department of Transportation 15700 Dayton Avenue North Sid Morrison P.O. Box 330310 Seattle,WA 98133-9710 Secretary of Transportation (206)440-4000 DATE: August 14, 1997 �4 TO: Mr. Scott Woodbury AUG 2 - 5 1997 Project Manager City of Renton Surface Water Utility CITY -,,F RTL--NTON 200 Mill Avenue South, 4`h Floor Engineering Dept. Renton, WA 98055 SUBJECT: I-405 MP 2.32 CS 1743 Determination of Nonsignificance Renton Village Flooding FROM: Robert A. Josephson, PE, Manager of Planning & Local Coordination Washington State Department of Transportation Northwest Region 15700 Dayton Avenue North, MS 122 P.O. Box 330310 Seattle, WA 98133-9710 Dear Mr. Woodbury: Thank you for giving us the opportunity to review the Renton Village Flooding Project. The project has been forwarded to our Hydraulics group for their review. If you have any questions,please contact Don Hurter at 440-4664 or Chad Hancock at 440-4914 of my Developer Services section. CH:ch c:\chad\renton\gradvi11.doc PO Box 336, Renton WA 98055-0336 Phone: (425) 271-8800 Fax: (425) 271-9000 AUG 19 '1997 Tuesday, August 19, 1997 CITY CF l�ENTON Engineering Dept. Scott Woodbury, P.E., Project Manager Surface Water Utility City of Renton 200 Mill Ave So Renton, WA 98055 Dear Scott Woodbury: I own three properties in the Renton Village area. 645 Shattuck Av S (the yellow house on the Northwest corner of Shattuck And So 7th St), 641 Shattuck Av S and the 8 plex at 621 Shattuck Av S. The properties are adjacent to one another. The first time the storm sewers backed up was about 1982. The Park and Ride was new at that time. We had flooding about once every year for about five years. Once the car dealers at both corners of 7th and Rainier removed the beauty bark and installed grass, it seemed the backups have occurred every other year. The most recent flooding was February of 1996. Some of types and amounts of damaged occurring in 1996 are. My sidewalks at 645 have buckled and need to be repoured. I put a similar sized sidewalk in at my home recently for$1700. There is no reason to repair these until the problem stops. I had a nice picket fence there until the flood of 1991 1 have stored some of the fence portions on the west line of 645. The concrete posts are still in place but the water weakened the posts and required too much maintenance to maintain. It would ,:;ost about $4000 to reinstall this fence. The small building at 645 is at ground level and I have learned to keep storage in that building to a minimum. The morning the water came up I went down and woke the tenant up and I helped her get all her possessions off the floor. She maintained she lost $2500 worth of goods Some of the bulbs I planted there near the surface have floated away in the floods. I suppose that would total about $100. There are two hot water tanks at ground level, one in 645 and the other in the garage at 641. The 645 hot water tank has survived but the 641 hot water tank was only a couple years old and stopped working. The 645 tenant complained her washer and dryer(in the small building at ground level) are rusted. The sheet rock in the small 645 building is rotted and moldy. I have had problems with the water lines at 645 and had to shut off one line that branched off the main line providing water to two outside spickets. We usually clean up after the floods ourselves and I suppose it takes about 5 hours of labor and the water bill goes up probably $25 hosing out the crud. I have lost garbage cans and lids. There are other costs. I can't go out of town for extended periods beween October and April without giving instructions what to do if it starts to rain and rain and the water starts collecting at that intersection i{ 1 am anxious to do what I can to put an end to this problem. Please let me know if there is anything I can do to help. Sincerely, f CITY OF RENTON TELEPHONE/CONTACT RECORD Contacted: Vic Diambri Date of 8/18/97 Contact: Telephone No.: 255-7270 Time: City of Renton Scott Woodbury File No.: Renton Village HMG Contact: SUBJECT: Renton Village Hazard Mitigation Location: Phone Conference Grant (HMG) Application Items Discussed. Mr. Diambri stated that he did not feel that City of Renton should be involved in a private drainage problem. Even if there is an interest to the City to solve the flooding problem, the City taxpayers should not be required to pay for any portion of the local share of the HMG. The owners of the property on which the project is located should pay for the project. Mr. Diambri said he now owns or previously had owned several properties on the north side of SW Grady Way. He indicated that he would submit a letter to formalize his comments. Recommended Follow-up: cc: Ron Straka 08/18/97 CITY OF RENTON TELEPHONE/CONTACT RECORD Contacted: Mary Ryan Date of 8/18/97 Contact: Telephone No.: 255-7270 Time: City of Renton Scott Woodbury File No.: Renton Village HMG Contact: SUBJECT: Renton Village Hazard Mitigation Location: Phone Conference Grant (HMG) Application Items Discussed. Ms. Ryan called to inquire whether the Renton Village project would benefit her properties near the intersection of SW 7th Street and Shattuck Avenue. She also wanted to know if the City had any plans to address the flooding problems of SW 7th Street. She said that there has been significant flooding around the buildings on her property, but there has been no flooding of the main floor, except from waves caused by vehicles driving through the standing water. She tells tenants not to store damagable items in the garage or basements because of the flooding, but tenants still do. She thought that worse flooding had been prevented because someone has been pulling the lid off of the Metro sewer interceptor manhole in SW 7th Street when the flooding occurs. Recommended Follow-up: cc: Ron Straka 08/18/97 6 /�� C-.4'ss, - S'/7 lel- 2 W, 4r-ezlt,�,te s �5� 430 0✓If" (41i71 ell 3 Le-. d r a� *7� 3 r� ��l �s 5 r �U� l„w c(eM,h � 1�,.t d,• ,� - 3zr- �iz3 A $6o try �,�f�"1 Rp31U y� / V-0 r" t Shod Plat•(SHPL#- ) . REQUEST FOR PROJECT# Prolim.Plat (PP# ) CAG# ) To: Technical Services Date W-, ti WO# NYt_ Green# From: Plan Review/P lcct Manager /`�►� �Y�'~ clf� Project Name �tit �� e//.,a (7 characters ) Description of Project: p 'i�� %�►cS � ��ICI M �oryr-awn G+, t'�A (444 IF W G4 Ira �*yfir/ 5 fvS� i'l �kj U Circle Size of Waterline: 8" 10" 12" Circle One: New or enston � Circle Size of Sewerline: 8" 10" 12" Circle One: New or Extemion Circle Size of Stormline: 12" 15" 18" 24" Circle One: New or Extensio�K r^2�-�f � faU_lk CIA. Address or Street Name(s) ("ar, Dvlpr/Contractor/Owner/Cnslt:: Vl 1,41,13 (7 chacacccts max) Check each discipline involved in Project Ltr Drwg #of sheets per discipline ❑ Trans-Storm ❑ ❑ (Roadway/Dralnagc) (011 me site improven=ts)(indude basin name) (include IT-SC sheets) ❑ Transportation (Signalizidon,Channdization,lighting) ❑ ❑ ❑ Wastewater ❑ ❑ Sanitary Scwcr Main(inciudc basin name) ❑ Water (Mainz.Valves.Hydrants) ❑ ❑ (Include composite 6c Horizontal Ctrl Sheets) Suface Water r �l jz644 d rt ❑ Improvements (CLP ONLY)(includc bast name) TS Use Only —�—