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-_ -�is��"� Y 'a v\ \� l iti. \\\ ` �'1;•\ 4 \ O O R i'O' U O wO = '�''r _yk`���•�\\ ` �•'�'� \�A\`.� \�l. \z�,,:;N q; r � .i r j' ����� � t`� \. \�`\\r � f��` °�j� o•s:�d/ '�<,.,,3y" �.�:g'a \�, L E3 WASHINGTON`. _ NE uLOiJt3 r' G�.- \ i _- --� rl- - - 5 - Kr - -, ;�� �sti \ \�, \ f �r;,J?�MEMORIAL PARK \{fi • /\\\(CITY OF RENTON) 01 \�k�u �� �r - - �'. .\\ \\ t\\ z a1 \ °� S lq )• k✓ 1 4 EX o y�PUND jo \ \ T� ,p \.. � ��!\�(� G `EMBANK• ZQ01 jr. 2 I �• ` 3�-SJ`a . - _�✓ ° �..-_- .r -`�� ^'r� �' -\' ��"�`--� ���'=' �^�',-t"�'vl`-''x�aye-'.�-- --"„--,.,r _'-�'S�'� ; - �__-._. vy�_-r��•� r _ BNSF RR _ _T- - J— r 4 ^.i'•J�.i ��-If 1�(�` r 1/�%r�-.J:,.- 1, „ /. ��e\�r gk.0 .p __ r h/�r:�•='�..V'_"i�'� �:J`-�J-"������r-_``'-�J-.__ J _�� - '-�- i_ _�.+, � � ,e;�'?�J•---s_ __ --- _ �-=�-_— —' -� 1 I 44 //i�/1 1l l 1 }✓ i --j r\\ # i fit` __ J qss r, `_-- 143 ,. r // f 1 �551 42 158 ) 1-b9 �\ -. 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OR CONSTR:UO:TION: ...... .. ... ... ..... Lk INFORM.ATIO:NI .:::: .: .::: :: .. : :.:N0TI1N000DE .... ..... . .. .... _ .. .. .... .. . .. .... . ...... 0 FILE NAME Cs\pnworkin \dms026T8\Bp 042oO45d_CEVP_3of3.d n BEc}o■ STATE I-405 CONGESTION RELIEF & TIME 8:57E.28 AM... .. __ .__...__ __. __..._ _ ....... ■o. FE0.A1D PROJ.NO. _..M DATE VIW20o4 BUS RAPID TRANSIT PROJECTS ..... 10 WASH PLOTTED BY earnest) .... .. .- NORTH 8TH STREET HOV DIRECT ACCESS DES 1 GNED BY E.LIOU J0B1�B 4 $ • .... .. .... ... .. ... ENTERED BY A DEGUIJNAN SHEET CHECKED BY K.HDCSON - cBMr}ucr NO. Lounox■o. TT-.p.htlen EVP F _. — — PROJ. ENGR. R BENITO DRAINAGE PROFILE SHEETS ..... REGIONAL ADM. D.DYE REVISION DATE BY P.E. STAMP BOX P.E. STUD BOx DATE W Iz Q -\,( JoAns Crc 40 r1 40 ZZ �X, 6 A2,0UAID 00 03 ^ X x ' 41 :4- � 3 �9 W 30 0 eve z3•W1 �3, /J — — 20 — .�. — 20 �qz (l� ZJ.rs 21.04) Iq Z) (tq.$z) (2o.o6� p6,is �6 a� 92- 10 1 �el'1 h Znto• �uvyr 4 = 5- ��� 10 0+00 1+00 2+00 3+00 4+00 5+00 6+00 7+00 8+00 9+00 10+00 / / 1 l LINE SURFACE OFFSET N , R T1-74 /\ A- V � N. OU7FIq L L topo 0.00 - -- Scaled 10.0000 Times Ver. PInOFILE Scaled 1.0000 Times Hor./ ,�y ,�y s ,� I I DA s.+o-I LAKE WASHINGTON 52.I4AC ` JOHNS CREEK�� -✓!r L� ♦ DA 5.40-2 , -' y N 30TH ST. r 207.34 AC N PARK OR. I N 8TH ST. - - \� , - - - - - - - - - - - _ - - - _ - - - ' _ �'� rc CEDAR RIVER R ► 1 5. 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STAMP eml DATE P.E.srAln BOX 0a7E 1, Te23No Ro5Eo WoMo NB405 BR 32327 SO FT N 8TH ST. N PARK DR. -f `�I 1 N8 SB RAMP DA 64867 SO FT SB N8 DA I104 49882 SO FT NB N8 DA I105 72551 SO FT N8 125750 SO FT SB&NB N8 DA I103 702799 SO FT N8 BR DA 13009 SO FT -k> C f • ` �-~"'"�� + "NS DA 1102 105812 SO FT N8 DA I101 290110 SO FT PRELIMINARY NOT FOR CONSTRUCTION 0 200 400 ALL INFORMATION SCALE IN FEET NOT INCLUDED FILE NAME CE\ wworkin \dms02678\exhibit-NSthOnSiteDraina eBasin.d n TIME 4S22E37 PM 111,0,1!wl STATE FED.AID PROJ.NO. 1-405 CONGESTION RELIEF & DATE 5/14/2004 PLOTTED BY earnestl 10 WASH BUS RAPID TRANSIT PROJECTS DESIGNED BY E.LIOU JOB WJMR NORTH 8TH STREET HOV DIRECT ACCESS T EXHIBIT uLOCATIONS"jET ENTERED BY E.LIOU /�o.•.w••ear...Pen.u.• CHECKED 8Y cowcT NO. Eoriow wo. w.rtiEm•«•e. DP PROJ. ENGR. — DATE DATE NORTH 8TH ST. HOV DRAINAGE BASIN SHEETS REGIONAL ADM. - REVISION DATE BY P.E. STUD OU P.E. STAMP BOX � iProject Team Congestion Relief&Bus Rapid Transit Projects I-405 Project Temporary Location 600 — 1081h Avenue NE, Suite 405 Bellevue, WA 98004 Fax: 425-453-4050 City of Renton Environmental Task Force/Permitting Meeting June 16, 2004 AGENDA I. Follow-up to 5/14 Action Items 1. Jennifer to discuss changing the code to allow for out of basin mitigation with code writer. 2. Jennifer to check code to determine whether a code change would be required if mitigation occurred outside the drainage basin, or if a variance code be applied for. 3. Tracey to check other codes to see if there is language that allows for mitigation out of basin and provide to the City. 4. Sasha Visconty to call Kayren to coordinate meeting with smaller group to t discus floodplain issues. Note: Sasha called Kayren and has been in touch with Ron Straka, who is collecting the information requested in the written �v�✓ information Tracey provided Kayren with at the meeting. The City does not believe a meeting is needed at this time. Sasha has a call in to Ron to find out when we can expect to receive the requested Information and answers to questions. 5. The 3`d Wednesday of every month is reserved for a permitting meeting at the City of Renton from 3-5 pm. II. Springbrook Update 1. Draft permitting requirements and timelines for Springbrook EEI site. fUr'OkL ,�►�.�ti wVIn� Nt7- �- p^ J �N , j r Washington State T, Department of Transportation w 1 _ Congestion Relief S Bus Rapid Transit Projects City of Renton & WSDOT Design Team Meeting Date: June 16, 2004 Location: City of Renton, Conference Room 511 Time: 1:30—3:00 1) Project Manager's Report Deliver the Nickels; Stand Ready for RTI D '05-'07 Program Building 1-405 Team Changes 2) MOU • Next Steps 3) Footprint Design Progress • North Renton EA Update, Local Street Design Standards • South Renton Mainline Alignment; Talbot I/Cs 4) N 8th ST DA Design Status • Current status of the project. 5) Task Force Updates • Environmental EEI -SCWAHB Update • Permitting (third Wednesday of each month) • Pumps/Parks Task Force Recommendation (last Thursday of each month) • Traffic Analysis (last Thursday of each month) • Emergency Response (last Thursday of each month) • Economic Development (second Tuesday of each month) 6) Citizen Involvement/ Public Outreach Process • Recent Activities Renton Hill neighborhood mtg. • Upcoming Activities Talbot Hill neighborhood mtg. Non- motorized Committee Meeting, CSS ... MWashington state r- Department of Transportation r Congestion Relief 6 Bus Rapid Transit Projects Upcoming Event Dates —June 17 1-405 Executive Committee June 21 _ Talbot Hill Neighborhood Meeting_____ June 23 1-405 Steering Committee Possible Cancellation _ July 1 Renton Non-Motorized Citizen's Advisory Committee _ Task Forces June 16 Permittin June 24 Pumps/ Parks June 24 Emergency Response June 24 Traffic Analysis July 13 Economic Development �Washington State fI/ Department of Transportation I ' Project Congestion Relief S Bus Rapid Transit Projects 600—108"h Avenue NE, Suite 405 Bellevue,WA 98004 Main 425-456-8500 Fax 425-456-8600 Renton Hill Community Association Meeting Summary On Tuesday,June 1,2004, representatives from the 1-405 Corridor Project Team presented a project update to the Renton Hill Community Association. The meeting was held at Renton City Hall in the Council Chambers starting at 6:00 P.M. Stacy Trussler, Renton Section Manager for the 1-405 Project Team,delivered an overview of the 1-405 project. Stacy's presentation included information on the needs for 1-405, a summary of the Master Plan,and a summary of the 1-405 Nickel Projects. Ross Fenton, 1-5 to SR-169 Contract Manager for the 1-405 Project Team,delivered an overview of the Nickel and Implementation Plan project within the City of Renton area,and the projects main features. Presented information included the following: Nickel Project • The Nickel Project is the 1-405 work currently funded. • Three segments make up the Renton Nickel project,an additional northbound lane from SR-181 to SR- 167,an extension of the SR-167 southbound HOV lane north to 1-405,and an additional southbound lane from SR-169 to SR-167. • The Nickel segment adjacent to Renton Hill,the additional southbound lane, includes the following features: o Does not alter the two current accesses to Renton Hill at Cedar and Renton Avenues. o Reconstructs the existing Benson Road structure over 1-405 to accommodate the proposed future Master Plan configuration. o Contains the proposed 1-405 roadway widening within the existing right of way by using retaining walls. Additional right of way is required to construct storm water facilities and to re- construct Benson Road. • Construction is currently scheduled to start in 2007 and open to traffic by January 2011. Implementation Plan and Master Plan Proiects • These 1-405 improvement plans are not currently funded • The Master Plan includes the following features: o Adds two lanes in both directions on 1-405 o Reconfigures the SR-167 interchange as two separate interchange,one for system to system (1-405 and SR-167)traffic,and one for local traffic. The local traffic is removed from Rainier/SR-167 and directed to new interchange connections at Talbot and Lind. o Reconfigures the SR-169 interchange as a split diamond with 1-way frontage road couplet between SR-169 and 3rd Ave.with direct connector ramps between north leg of 1-405 and east leg of SR-169. o Adds auxiliary lanes on 1-405 between SR-167 and SR-169. • The Implementation Plan includes the following features: o Adds only one lane in both directions on 1-405 between 1-5 and SR-167. o Same as the Master Plan from SR-167 to the north Adilk VW-Washington State Department of Transportation C.Documents and Settingslnafza61Loca1 SettingslTempW_06-01-04_Renton_Hill_Neighborhood h tg_1.doc i � Project Team Congestion Relief S Bus Rapid Transit Projects 600—1081h Avenue NE,Suite 405 Bellevue,WA 98004 Main 425-456-8500 Fax 425-456-8600 o Reconfigures the SR-167 interchange except the existing loop in the NW quadrant remains and there are no direct connector ramps between SR-167 and the south leg of 1-405. • With the widening for the 1-405 improvements, both the Renton Avenue and Cedar Avenue structures over 1-405 will need to be removed. o Due to the terrain,both structures can not be reconstructed without major impacts to the Renton community at the base of the hill. o The Renton Avenue and Cedar Avenue crossing can be combined to form one replacement route between Renton Hill and Main Avenue. o Several optional routes off of Renton Hill were considered(see Renton Hill Access graphic). Major issues considered in reviewing these options included: ■ Emergency access and response ■ Drive through traffic if access provided both on the north and south sides of the hill ■ Traffic operations on and off the hill, including maintenance,snow closures,and maintenance of traffic during construction. o Current concept includes: ■ General purpose access on the north side of Renton Hill using a Renton Avenue to Main Avenue route ■ Emergency accesses on the south side of Renton Hill at both Beacon and at Grant, using"opticom"controlled gates to restrict general purpose traffic. ■ Possible emergency access on the east side of Renton Hill between Narco Road(in the Cedar River Park)and Renton Avenue if this access is required for emergency response. Use of this road would be restricted by locked removable bollards,placed to prevent general purpose,but allow pedestrians and bicycles trips. Stan Enger,City of Renton Fire Marshall,addressed emergency services to Renton Hill both today with the two accesses and in the future with the 1-405 improvements and a single access. Presented information included the following: • The department's goal is to maintain or improve emergency response to Renton Hill both during construction and after project completion. • The department has evaluated the historic emergency response times and simulated emergency response times based on the proposed changes. • The department concluded that a single access with improved alternate routes from the south will meet or improve the emergency response to Renton Hill. • Operations of the controlled gates on the north side of Renton Hill will be as determined by the city of Renton Karl Westby, 1-405 Traffic,addressed traffic issues. Generally, both existing and projected traffic volumes accessing Renton Hill can be accommodated with a single Renton/Mill access. Projections for 2030 traffic are based on full development of Renton Hill property, including new developments currently under construction,and conservatively assumed more trips per household to reflect changes in home ownership to younger families with more trips per day than are currently generated. Adw Washington State V0 Department of Transportation CADocuments and Settingslnalzahli-ocal Set6'ngslTempih 06-01-04_Renton_Hill Neighborhood Mtg-l.doc 4 IWV Congestion Relief S Bus Rapid Transit Projects 600—108",Avenue NE, Suite 405 Bellevue,WA 98004 Main 425-456-8500 Fax 425-456-8600 Karl presented graphics comparing AM and PM hour volume use at Renton Avenue,at Cedar Avenue,and combined: AM Peak Hour: 2002: 120 trips(100 use Renton Avenue and 20 use Cedar Avenue) 2030:220 trips(160 use Renton Avenue and 60 use Cedar Avenue) PM Peak Hour: 2002:290 trips(190 use Renton Avenue and 100 use Cedar Avenue) 2030:610 trips(340 use Renton Avenue and 270 use Cedar Avenue) Kad also presented graphics summarizing both AM and PM peak hour intersection operations(level of service and average delays in seconds)with projected 2030 traffic both with and without the project. Traffic operations at the adjacent intersection are expected to be equal to or better with the single Renton Hill access and the 1-405 corridor improvements than if no action is taken. Some reduction in traffic on local streets is expected with construction of the project due to the increased capacity of the improved 1-405. With the increased capacity of 1-405,through traffic is expected to shift back to 1-405 rather than attempt to bypass back-ups using local roads. AM Peak Hour: No Action: 4th(Cedar)and Main Intersection: LOS—A(6.7 second delay) Houser and Main Intersection: LOS—A(6.4 second delay) Mill(Renton)and Houser Intersection: LOS—A(3.9 second delay) With Implementation Plan: 4th(Cedar)and Main Intersection: LOS—A(9.1 second delay) Houser and Main Intersection: LOS—A(3.1 second delay) Mill and Houser Intersection: LOS—A(3.8 second delay) PM Peak Hour: No Action: 4th(Cedar)and Main Intersection: LOS—C(24.0 second delay) Houser and Main Intersection: LOS—D(48.5 second delay) Mill(Renton)and Houser Intersection: LOS—A(9.6 second delay) With Implementation Plan: 41h(Cedar)and Main Intersection: LOS—B(14.6 second delay) Houser and Main Intersection: LOS—B(19.1 second delay) Mill and Houser Intersection: LOS—A(4.0 second delay) Issues and concerns identified by the Renton Hill Association meeting attendees included the following: • Currently, northbound Main Avenue at the intersection with Houser has a limited storage lane for left turn queues. • Expressed a need for two access on and off the north side of Renton Hill: AMW V7Washington State 0-Department of Transportation ClDocuments and Set6ngsWal2alilLocal SettingslTemp% O6-01-04_Renton_Hill_Neighborhood Mtg-1.doc Congestion Relief S Bus Rapid Transit Projects 600—1081h Avenue NE,Suite 405 Bellevue,WA 98004 Main 425-456-8500 Fax 425-456-8600 o Why not use the park(Narco Road)emergency access road(between the Cedar River Park and Renton Avenue on Renton Hill)for everyday traffic? o Consider using soft curves paralleling the hill side contours to construct a general purpose access road between the park and Renton Hill(more south than the currently proposed intersection at Renton Avenue/Mill Avenue). o Will providing an access point midway between Cedar and Renton Avenues improve the distribution of traffic on Renton Hill between these two streets? • "Opticom"controlled gates can be forced open,allowing unauthorized general purpose traffic to access Renton Hill from the north. • Expressed concern with whether the"cul-de-sac"ing of Houser Avenue at Bronson and directing this traffic to Mill and Bronson will accommodate the additional traffic. [Note:traffic analysis,which is currently under development,will need to verify that Bronson can handle the additional traffic,diverted from Houser,prior to finalizing the decision to cul-de-sac Houser.] • Need to avoid creating a situation where vehicles need to stop on the uphill grade. Starting and stopping can be difficult on these steep grades when winter condition exists. [Note:Stopping on the upgrade to Renton Hill is not needed based on the low traffic volumes projections.] • Expressed concerns with northbound traffic to Benson Road passing through town on Main Avenue.[Note: 1-405 traffic will have improved access to Benson Road with the new interchange access points at Talbot Road.] • Distribution of traffic using Renton and Cedar Avenue on Renton Hill is dependent upon whether vehicles are heading north or south at the bottom of the hill. If heading south vehicles tend to use Cedar and if heading north vehicles tens to use Renton Avenue. [Note: Karl will adjust model to distribute traffic as described by Renton Hill residents; however,with the low traffic volume projections one access to and from Renton Hill is still expected to be sufficient.] • Noise from the freeway was identified as a potential concern. One attendee,who lives in a condominium located at Fourth and Wells, is very interested in noise walls between 1-405 and the`galley"portion of Renton. Residents on Renton Hill need to consider views versus noise walls. This issue will be addressed during the environmental impacts portion of the project development. Action Items: • Layout a general purpose access road between the Cedar River Park and Renton Hill following the contour of the hill side. • Review feasibility of providing two structures over 1-405 at Renton and Cedar Avenue with common roadway connection to Main Avenue intersection. Aulk Washington State �-Department of Transportation C.-Owuments and SettingslnafzafiV oval SettingslTempIR 06-01-0, Renton_Hill Neighbort*od Mtg_1.doc I ' Dject Team IWV Congestion Relief&Bus Rapid Transit Projects 600—108"1 Avenue NE, Suite 405 Bellevue,WA 98004 Main 425-456-8500 Fax 425-456-8600 e Adjust the traffic model to redistribute the Renton Hill traffic between Renton and Cedar Avenues in accordance with the feedback received from the association. • Review the expected traffic queues northbound on Main approaching 41h Street to identify any intersection improvements or constraints. • Check into the associations website as a possible source for providing project development information to community at Rentonhill.com Notes prepared by R. Fenton Washington State TWO Department of Transportation C:IDocuments and Settingslnalzalkocal SettingslTempW-06-01-04_Renton_Hill_Neighborhood Og Ooc I ' Dject Team IWF Congestion Relief&Bus Rapid Transit Projects 600—108'h Avenue NE, Suite 405 Bellevue,WA 98004 Main 425-456-8500 Fax 425-456-8600 DRAFT NB 1-405 to SR 169 Ramp Alignment Recommendation Presented by: City of Renton Wells & Parks Task Force June 2004 Recommendation This document presents alignment concept Option 2(of the proposed Northbound 1-405 to SR 169 off-ramp)as the recommended ramp alignment option by the City of Renton Wells& Parks Task Force. Although a recommended ramp alignment has been determined by the Task Force,there exist several details that require further discussion by the city. These details are: • What location and in what capacity should the corrosion control treatment building be relocated. Would a separate delivery location be feasible/acceptable for the Sodium Hydroxide and Phosphate(to be pumped to the actual treatment building or well injection points)? If pumping is allowed, how will the risk of leaks be addressed? • What access route is acceptable for the chemical delivery vehicles? Would it be prudent/acceptable to schedule off-hour(late night)deliveries? What are some operational plans that would provide the chemical deliveries in a manner that would best serve the city's interests and limit its liability? The city will discuss these issues internally and notify the Wells&Parks Task Force if further assistance is needed to facilitate a decision. Project Description (1-405/SR 169 Vicinity) Proposed improvements to the 1-405 mainline and increase of mainline footprint in the vicinity of the 1-405/SR 169 Interchange will result in the need for a new northbound 1-405 to SR 169 off-ramp. The proposed location for the ramp runs adjacent to several of the existing City of Renton primary water supply wells and treatment buildings located on the west side of the Cedar River Park. The facilities include City of Renton well#8,Well#9, a fluoridation treatment building, and a corrosion control treatment building. In order to preserve as much of the Cedar River Park resource as possible and yet minimize impact to the city's water supply infrastructure, several ramp alignment concept options have been created and analyzed. Photo 1 shows Well#8(far left),the fluoridation treatment facility (middle),and the corrosion control treatment building(right). Photo 2 shows Well#9. Adw Washington State �r- Department of Transportation 6/14/2004 9:25 AM 1 S:IOO1ladminlcorreslDratiRecLet-NBto169.doc S— i � Project Congestion Relief&Bus Rapid Transit Projects 600- 108th Avenue NE, Suite 405 Bellevue,WA 98004 Main 425-456-8500 Fax 425-456-8600 {'sr x r, Photo 1. Treatment Buildings and Well #8 (looking southwest) Photo 2. Well #9 (looking north) Amok V7Washington State 0 Department of Transportation 6/14/2004 9:25 AM 2 S:I001ladminlconeslDraRFiecLet-NBto169.doc iw7- Project Congestion Relief&Bus Rapid Transit Projects 600—1081h Avenue NE, Suite 405 Bellevue,WA 98004 Main 425-456-8500 Fax 425-456-8600 Description of Options The task force considered several conceptual alignments. The two most realistic conceptual options for the ramp alignment were looked at in more detail per the task force recommended considerations. These options will be known as Option 1 and Option 2. Attached is an exhibit showing the alignment of the two options. Option 1 is in green and Option 2 is in orange. The Option 1 alignment design concept is the ramp alignment that exists in the current North Renton channelization plan. This option impacts both Well#9 and the corrosion control treatment building. A new well and treatment building would need to be provided along with a new access for maintenance and chemical deliveries. Option 1 avoids well#8, but it will restrict access to it. Option 2 places the new ramp alignment further east towards the park green area and closer to the community center. With the alignment located further to the East,Well#9 will not be impacted. However,the corrosion control treatment building will still be impacted by the new ramp and by a new access roadway to be installed to maintain access for maintenance and supply trucks. The corrosion control treatment facility will need to be relocated to a new location preferably between the new ramp and the 1-405 mainline. Design Concerns and Considerations The Task Force has considered 11 areas of concern as identified by the City of Renton and 1-405 Design Team for consideration and appropriate design action as necessary. These areas of concern are as follows(also attached is a matrix of Concern and Discussion Points with additional information on each item): 1. Wells 2. Treatment Facilities 3. Utilities 4. Maintenance/Emergency Access 5. Operation During Construction 6. Cedar River Park Impacts 7. Visual Impacts 8. Heritage Tree 9. Parking 10. Noise 11. Motorist Distraction Wells Option#1 will require relocation of Well#9. The process for locating,testing and implementing a new well is a lengthy process and the timeline could take 5-7 years or more. Furthermore,a new well may not meet production needs. It is not until after a well is drilled and tested that the actual production capacity is known. This uncertain timeline and (acceptable)production uncertainty would add much risk to project schedule with a real possibility that a new location for the well will not be feasible within the available areas. Option 2 avoids impacts to both well#8 and well#9. Therefore this option would avoid the risk of testing for and approving a new well. Treatment Facilities For both Option 1 and Option 2,the corrosion control treatment building will need to be relocated. In Option 2,there is more room between the mainline and the new ramp to locate a new facility. A conceptual design of a new Idw Washington State ��Department of Transportation 6/14/2004 9:25 AM 3 S:I0011adminlcorreslDraftRecLet-NBto169.doc K;Irw- Project Congestion Relief&Bus Rapid Transit Projects 600— 108'h Avenue NE, Suite 405 Bellevue, WA 98004 Main 425-456-8500 Fax 425-456-8600 corrosion control treatment building was laid out by water treatment design professionals. There are two options for location of the new facility. It appears feasible for the new building to be located either adjacent(north)to the fluoridation and existing corrosion control treatment building or just south of well#9. A plan depicting the two proposed locations along with a conceptual layout of the new building is attached. Utilities In both options,there will be relocation or modifications to the existing utilities and stormwater facilities. Maintenance/Emergency Access Maintenance access must be provided for both options. The current gated access roadway that runs around the northwest corner of the park will be cut off by both of the new ramp options. Option 1 would require new access to be provided to a relocated well#9 and corrosion control treatment building and also maintain access to well #8 and the fluoridation building. A semi type truck must be able to maneuver and access the wells and treatment buildings. Photos 3 and 4 show the tanker truck that supplies Sodium Hydroxide(Caustic Soda Solution)to the corrosion control treatment facilities. The current delivery cycle for the tanker truck is once a month in the winter increasing to 4 times a month in the summer. It may be prudent for chemical deliveries to the treatment facilities to occur at night in order to allow truck movements through the parking areas and more importantly limit potential liability risks of the City. _ J Photo 3. Tanker Truck pumping caustic soda solution to storage tanks in building Admk MWashington State , Department of Transportation 6/14/2004 9:25 AM 4 5:10011admintcorres0raftReclet-N6to169.doc IProject Congestion Relief S Bus Rapid Transit Projects 600— 108'h Avenue NE,Suite 405 Bellevue, WA 98004 Main 425-456-8500 Fax 425-456-8600 jl ' 90 _4 Photo 4. Tanker truck turning around to exit park Option 2 proposes a controlled maintenance access (right in/right out)off of SR 169 between the mainline and new ramp. This access location will need WSDOT approval as it will be located in a WSDOT access controlled area. A WB-50 was modeled using Auto-Turn to verify turning movements along the access roadway. A WB-50 is a semi tractor trailer truck with a total wheel base length of 50 feet. Vertical clearances have been checked in locations where the trucks will cross under the new ramp. In both scenarios it is necessary to provide 2 access points into the park area and continued access around the community center for emergency vehicles. The two accesses should provide a 20 foot minimum roadway width for fire access and vertical clearance for a fire truck. Operation During Construction For both options, it will be necessary for the existing treatment facilities and wells to remain in operation during construction. The new facility will be tested and approved by the city and Department of Health prior to going on-line. At the time of implementation and switch-over to a new facility, brief shut downs of the treatment facilities may be possible by coordination with the City. Strict guidelines will need to be in place to prevent contamination of the water source. These items will be included in construction scoping documents. Cedar River Park Impacts There is greater impact to the park grass area with alignment Option 2 than in Option 1. However, by not impacting the wells, the risk of locating and attaining approval for a new water source within the park property is avoided. Ramp Option 2 would be located approximately 60 feet from the community center and approximately 30 feet from the baseball diamond. Whereas Ramp Option 1 would be located approximately 80 feet from the community center and approximately 50 feet from the baseball diamond. Amok MWashington State , Department of Transportation 6/14/2004 9:25 AM 5 5:Ml0 adminlcorreslDrafiRecLet-NStot69.doc wI , Project Congestion Relief&Bus Rapid Transit Projects 600—108'h Avenue NE,Suite 405 Bellevue,WA 98004 Main 425-456-8500 Fax 425-456-8600 Visual Impacts, Heritage Tree, Parking Loss, and Noise There will be visual impact due to both options with slightly more impact with Option 2. In both options,the heritage tree would be impacted,and therefore it would need to be removed. It should be possible to maintain the current number of parking stalls in both options. If it is necessary to impact any parking stalls,there is room to relocate the stalls. There will be increased vehicle noise in both options. Motorist Distraction For both options,when maintenance occurs on the Pumps(every 5 years or so unless there is an emergency),the process may present a distraction to motorists. The distraction is not greater than what currently occurs during pump maintenance, but with the new ramp alignment, it will be located between the ramp and mainline. Summary The aforementioned areas of concern have been considered for the construction of both conceptual alignment Option 1 and conceptual alignment Option 2. Based on the resulting impacts and related project risk considering the committee determined areas of concern,the Task Force recommends Option 2 as the preferred alignment for the new NB I-405 to SR 169 off-ramp. This conceptual alignment avoids impacts to both City of Renton Well#8 and Well #9 while minimizing impacts to the park green area. A key point being that by avoiding impact to City of Renton Well #9,the inherent risk associated with providing a new well source will not occur. In addition, it is feasible to relocate the corrosion control treatment building between the new ramp and mainline. This will be done while still maintaining treatment to the water supply until such a time that the new facilities are approved and ready to tie into the system. It is a requirement that emergency, maintenance and re-supply delivery access be maintained to the wells and treatment facilities. Again although the ramp alignment has been determined by the Task Force,there remain several outstanding details for which the City desires further discussion and information to determine an appropriate direction to proceed with to complete the concept from their position. These details include: • Where and how the corrosion control treatment building would be relocated. • What access route is acceptable for the chemical delivery vehicles and are off-hour(late night)deliveries a possibility? • What are some operational plans that would provide the chemical deliveries in a manner that would best serve the city's interests and limit its liability? The city will discuss these issues internally and notify the Wells& Parks Task Force if further assistance is needed to facilitate a decision. Washington State �.•� M// Department of Transportation 6/14/2004 9:25 AM 6 S:IOO1ladminlcrorreslDraRRecLet-NBto169.doc h,,o(4r S ysfem �Z*11-mr Poor Caustic s-�arar �+rnks j�haspl�-ar 4 r d tl V�4C 6 ooa .,t ee% I N\ GlP,�►fc,�.Q �'Je�rnr��. �Ou,.�t chfMi cAl C,"+-4ln Mrn Nei.✓ Corrof;m 70 _ C) imp- 1 jr r ,.• 14jL-, RAMP OPTION 1 -r44 ------------------ - ---r 1 `-- - IN RE N COMMUNITY CENTER ' x CARCO CENTER AL A. / / J ` CEDAR RIVER PARK LEGEND EXISTING ROW LINE RAMP OPTION L RAMP AREA OPTION OPTON I PRELIMINARY FILE NAME C:\ wworkin \dms01982\exhibit-NB405 to EB SR169-rompcom .d n TIME 9X08X3B AM REMoa STATE FED.AID PROJ.NO. DATE 6/16/2004 0 50 100 1-405 PLOTTED BY michoel - 10 WASH SCALE IN FEET SR169 - I-90 RECONSTRUCTION DESIGNED BY JOB N"MKR • 1-405 NORTH RENTON SHEET ENTERED BY CHECKED BY CONTRACT NO. LOCATION N . . o. +�► . EXHIBIT � OF PROJ. ENGR. DATE GATE NB405 TO EB SR169 OPTIONS SHEETS REGIONAL ADM. REVISION DATE BY PA STAMP BOX P.C. STAMP BOX - ► 4� . f ..:. CEDAR RIVER PARK W11 d I ��t4 � �� 'f F p r a•'u _ l � ���4 T • d ti L1BE PARK I-405.,SR 169 ,r INTERCHANGE �♦ �• IT EN it EN l� 1 , Y �a• REINFORCED SIDEWALK AND CURB WITH GATED ACCESSER ♦ t' ' • P ��- -r. CEDAR RIVER PARK r r t 1i Sri jt� j� ♦ CE` RIVER,,. CROS ING {� Y SCALE IN FEET ,011 i 5D 42 50 BYoIf �YYjo : �•.1� . 1 a i. 3 00 ss so � Y Y D — 50 o0 00 ACCESS • ,ate ,r � �� � '•, P, ,. 0 0 0 o AND - 3 00 12 50 TURNAROUND WB-50 feet � � )''y � > ! � , � LEGEND Tractor Width 8 00 Lock to Lock Time 6 00 ROUTE +, �.. t a EXISTING ROW LINE Trailer Width 8 50 Steering Angle 1i 30 ' _ f � RAMP AREA g g PRELI RY ; i a ; PROPOSED TRUCK ACCESS tractor Track 8 00 Articulating culatin Angle 70 00 E, Trailer Track 8 50 + r FILE NAME C:\ wworkin \dms01982\exhibit-cedor pork i octs.d n TIME 9s23151 AM REr ION STATE FED.AID PROJ.NO. DATE 6/16/2004 1-405 PLOTTED BY michoel — 10 WASH SR169 — I-90 RECONSTRUCTION DESIGNED BY — JOB M1EbE111 1-405 NORTH RENTON SHEET ENTERED BY CONTRACT MO. LOCATION.o. =ww"' EXHIBIT 1 CHECKED BY _ � DE PROJ. ENGR. :ATE- — DATE TRUCK ACCESS FOR OPTION 2 SHEETS REGIONAL ADM. REVISION I DATE BY P.E. STAMP BOX P.E. STUP Box PROP. NORTHBOUND MAINLINE PROP. SOUTHBOUND MAINLINE CL HOUSER WAY NEW RR EXISTING RR T'-8' RETAINING WALL I� RETAINING — EXISTING CLEARANCE NEED TO MAITAIN 13' OF CLEARANCE TO MATCH EXISTING PRELIMINARY FILE NAME C:\ wworkin \dms01982\exhibit-cedar river park access sectional n TIME 10:26:10 AM REGION STATE FED.AID PROJ.NO. DATE 6/16/2004 I-405 PLOTTED BY michoel 10 WASH DESIGNED BY JOB ROBBER ' SR169 — I-90 RECONSTRUCTION ENTERED BY EXHIBIT SHEET CHECKED BY CONTRACT NO. LOCATION NO. TW j ov PEGI ENCR. -„ CEDAR RIVER PARK ACCESS RD LOOKING NORTH SHEETS REGIONAL ADM. REVISION DATE BY F.E. sT.w Box DATE P.E. STUD BOX DATE -C, '•• �D- - _ -- - - - -- - -- - - - _- V 0 --� \ — --- --- ----- ----— _ __- __� _ —�_---------- -- ------ _ -- '- -- ----�=-- _ P NEW N CONTROL IL FACILITY •• ; - OMMUNITY CENTER • �� � � � RCO CENTER • r /// Ile r r CEDAR RIVER PARK I 10 ` W7, v / . . W B — 50 3.00 35 50 + a0 00 ACCESS • 914 0 0 0 o AND p 'I A 3 99 12.50 TURNAROUND X 2-4- Y WB-50 feet ROUTE x�� = A. LEGEND - - Tractor Width 8 00 Lock to Lock Time 6 00 / EXISTING ROM LINE — Trailer Width 8 50 Steering Angle 17.39 F , Tractor Track A 00 Articulating Angle 70 00 s RAMP AREA PROPOSED TRUCK ACCESS Trailer Track 8.50 FILE NAME C:\pwworking\dms01982\exhibit-cedor park impacts o 3.d n TIME 9s01:45 AM BErpaw STATE FED.AID PROJ.NO. DATE 6/16/2004 0 50 ]00 I-405 PLOTTED BY michoel — 10 WASH SCALE IN FEET SR169 — I-90 RECONSTRUCTION DESIGNED BY _ JOB WIMP A • 1-405 NORTH RENTON SHEET ENTERED BY CHECKED BY calTlucr W. LOCATION NO. ��.+rrr.Br.. EXHIBIT E .r.rrrr d TrrrPaution PROJ. ENGR. OPT 2 MODIFIED ACCESS THROUGH PARK SHEETS REGIONAL ADM. I REVISION DATE I BY P.E. STAID BOX.4 P.E. STAID BOX , Meeting Minutes I-405 N Renton Project—John's Creek Direct Discharge May 17, 2004 Attendees: WSDOT: David Masters, Keith Hixson, Ernest Renton: Ron Straka,Chris Munter, Leslie, Keith Woolley Per WDOT, net increase of impervious area to drain to John's creek is 10 acres. All freeway runoff will be treated utilizing ecology embankments(possible lag time effects acting as detention). WSDOT to do analysis of current condition, compare existing and future land use conditions. Design culverts to outfall to pond#2 to reduce right angles. Project Team Congestion Relief 6 Bus Rapid Transit Projects David Masters, M.U.R.P. 600-108th Ave.NE Water Resources Lead Suite 405 Bellevue,WA 98004 Direct 425-450-2560 Main 425-456-8500 Fax 425-456-8600 david.masters@140S.wsdot.wa.gov www.wsdot.wa.gov/projects/I-405 ANIL TwD''tofT.prtw.. MS:NB82-250 Project Team Congestion Relief S Bus Rapid Transit Projects Keith Hixson 600-108th Ave.NE Suite 405 Direct 425-450-2587 Bellevue,WA 98004 Main 425-456-8500 Fax 425-456-8600 keith.hixson@)I405.wsdot.wa.gov www.wsdot.wa.gov/projects/I-405 Idw ?%*.l of —ispe�fl-i MS:NB82-250 14. Finalization: (Reserved) 15. Expiration of Variance Approval: Any variance granted by the Reviewing Official, unless otherwise specified in writing, shall become null and void in the event that the applicant or owner of the subject property for which a variance has been requested has failed to commence construction or otherwise implement effectively the variance granted within a period of two (2) years after such variance has been issued. For proper cause shown, an applicant may petition the Reviewing Official during the variance application review process, for an extension of the two (2) year period, specifying the reasons therefor. The time may be extended but shall not exceed one additional year in any event. (Amd. Ord. 4835, 3-27-2000; Ord. 4851, 8-7- 2000) 16. Extension of Approval: For proper cause shown, an applicant may petition the Reviewing Official for an extension of the approved expiration period established per subsection D15 of this Section prior to the expiration of the time period, specifying the reasons therefor. The Reviewing Official may extend the time limit, but such extension shall not exceed one additional year in any event. (Ord. 3463, 8-11-1980; Amd.Ord. 4648, 1-6-1997; Ord. 4835, 3-27-2000; Ord. 4851, 8-7-2000) I I HAFile Sys\SWP-Surface Water Projects\SWP 27-Transporation Projects(TIP)\I405 Corridor Study\General WSDOT 10 Correspondence\W S DOTFloodp IainMemo06032004.doc g. The proposed activities will not jeopardize the continued existence of endangered, threatened or sensitive species as listed by the Federal government or the State; h. That the proposed activities will not cause significant degradation of groundwater or surface water quality; and i. The approval as determined by the Hearing Examiner is a minimum variance that will accomplish the desired purpose. (Ord. 4835, 3-27- 2000; Amd. Ord. 4851, 8-7-2000) 11. Continuation of Public Hearing: If for any reason testimony in any manner set for public hearing, or being heard, cannot be completed on date set for such hearing, the person presiding at such public hearing or meeting may, before adjournment or recess of such matters under consideration, publicly announce the time and place to and at which said meeting will be continued, and no further notice of any kind shall be required. (Ord. 3463, 8- 11-1980; Amd. Ord. 4648, 1-6-1997; Ord. 4835, 3-27-2000) 12. Board of Adjustment Decision Process: a. Board of Adjustment Shall Announce Findings and Decisions: Not more than thirty (30) days after the termination of the proceedings of the public hearing on any variance, the Board of Adjustment shall announce its findings and decision. If a variance is granted, the record shall show such conditions and limitations in writing as the Board of Adjustment may impose. b. Notice of Decision of Board of Adjustment: Following the rendering of a decision on a variance application, a copy of the written order by the Board of Adjustment shall be mailed to the applicant at the address shown on the application and filed with the Board of Adjustment and to any other person who requests a copy thereof. c. Reconsideration: (Reserved) d. Record of Decision:Whenever a variance is approved by the Board of Adjustment, the Building Department shall forthwith make an appropriate record and shall inform the administrative department having jurisdiction over the matter. (Amd. Ord. 4835, 3-27-2000) 13. Conditions of Approval: The Reviewing Official may prescribe any conditions upon the variance deemed to be necessary and required. (Amd. Ord. 4835, 3-27-2000) HAFile Sys\SWP-Surface Water Projects\SWP 27-Transporation Projects(TIP)\I405 Corridor Study\General WSDOT 9 Correspondence\W SDOTFI oodpl ai nMemo06032004.doc (4)A determination that the variance is the minimum necessary, considering the flood hazard, to afford relief. c. Conditions of Approval: Upon consideration of the factors of subsection 138b of this Section, and the purposes of this section, the Hearing Examiner may attach such conditions to the granting of variances as it deems necessary to further the purposes of this section. d. Notice Required upon Variance Approval: Any applicant to whom a variance is granted shall be given written notice that the structure will be permitted to be built with a lowest floor elevation below the base flood elevation and that the cost of flood insurance will be commensurate with the increased risk resulting from the reduced lowest floor elevation. e. Records: The Department Administrator or his/her designee, the Building Official shall maintain the records of all variance actions and report any variances to the Federal Insurance Administration upon request. (Ord. 4835, 3-27-2000; Amd. Ord. 4851, 8-7-2000) 10. Special Review Criteria—Public/Quasi-Public Utility or Agency Altering Aquifer Protection, Geologic Hazard, Habitat, or Wetland Regulations: In lieu of the variance criteria of subsection B5 of this Section, applications by public/quasi-public utilities or agencies proposing to alter aquifer protection, geologic hazard, habitat, stream and lake or wetland regulations shall be reviewed for compliance with all of the following criteria: a. Public policies have been evaluated and it has been determined by the Department Administrator that the public's health, safety, and welfare is best served; b. Each facility must conform to the Comprehensive Land Use Plan and with any adopted public programs and policies; c. Each facility must serve established, identified public needs; d. No practical alternative exists to meet the needs; e. The proposed action takes affirmative and appropriate measures to minimize and compensate for unavoidable impacts; f. The proposed activity results in no net loss of regulated wetland area, value, or function in the drainage basin where the wetland is located; HAFile Sys\SWP-Surface Water Projects\SWP 27-Transporation Projects(TIP)\I405 Corridor Study\General WSDOT 8 Correspondence\W S DOTFI oodpl ainMemo06032004.doc (10) The expected heights, velocity, duration, rate of rise, and sediment transport of the flood waters and the effects of wave action, if applicable, expected at the site; and (11)The costs of providing governmental services during and after flood conditions, including maintenance and repair of public utilities and facilities such as sewer, gas, electrical, and water systems, and streets and bridges. ii. Generally, the only condition under which a variance from the elevation standard may be issued is for new construction and substantial improvements to be erected on a lot of one-half(1/2) acre or less in size contiguous to and surrounded by lots with existing structures constructed below the base flood level, provided criteria in subsection B8b(i) of this Section have been fully considered. As the lot size increases the technical justification required for issuing the variance increases. iii. Variances may be issued for nonresidential buildings in very limited circumstances to allow a lesser degree of floodproofing than watertight or dry-flood proofing, where it can be determined that such action will have low damage potential, complies with all other variance criteria except subsections B8b(ii), (iii) or(iv), and otherwise complies with RMC 4-3-05012a and 12b of the general standards. iv. Variances may be issued for the reconstruction, rehabilitation, or restoration of structures listed in the National Register of Historic Places or the State Inventory of Historic Places, without regard to the procedures set forth in this section. v. Variances shall not be issued within a designated floodway if any increase in flood levels during the base flood discharge would result. vi. Variances shall only be issued upon: (1)A showing of good and sufficient cause; (2)A determination that failure to grant the variance would result in exceptional hardship to the applicant; (3)A determination that the granting of a variance will not result in increased flood heights, additional threats to public safety, extraordinary public expense, create nuisances, cause fraud on or victimization of the public or conflict with existing local laws or ordinances. HAFile Sys\SWP-Surface Water Projects\SWP 27-Transporation Projects(T1P)1d 405 Corridor Study\General WSDOT 7 Correspondence\W S DOTFI oodp I ainMemo06032004.doc a. Purpose and Intent: Variances, as interpreted in the national flood insurance program, are based on the general zoning law principle that they pertain to a physical piece of property; they are not personal in nature and do not pertain to the structure, its inhabitants, economic or financial circumstances. They primarily address small lots in densely populated residential neighborhoods. As such, variances from the flood elevations should be quite rare. b. Review Criteria: In passing upon such an application for a variance, the Hearing Examiner shall consider the following review criteria: i. Consider all technical evaluations, all relevant factors, standards specified in other sections of this section; and: (1) The danger that materials may be swept onto other lands to the injury of others. (2)The danger to life and property due to flooding or erosion damage; (3) The susceptibility of the proposed facility and its contents to flood damage and the effect of such damage on the individual owner; (4) The importance of the services provided by the proposed facility to the community; (5) The necessity to the facility of a waterfront location, where applicable; (6) The availability of alternative locations for the proposed use which are not subject to flooding or erosion damage; (7) The compatibility of the proposed use with existing and anticipated development; (8) The relationship of the proposed use to the comprehensive plan and flood plain management program for that area; (9) The safety of access to the property in times of flood for ordinary and emergency vehicles; HAFile Sys\SWP-Surface Water Projects\SWP 27-Transporation Projects(TIP)\I405 Corridor Study\General WSDOT 6 Correspondence\W SDOTFloodplainMemo06032004.doc the subject property, and the strict application of the Zoning Code is found to deprive subject property owner of rights and privileges enjoyed by other property owners in the vicinity and under identical zone classification; b. That the granting of the variance will not be materially detrimental to the public welfare or injurious to the property or improvements in the vicinity and zone in which subject property is situated; c. That approval shall not constitute a grant of special privilege inconsistent with the limitation upon uses of other properties in the vicinity and zone in which the subject property is situated; d. That the approval as determined by the Reviewing Official is a minimum variance that will accomplish the desired purpose. (Amd. Ord. 4835, 3-27-2000) 6. Special Review Criteria—Reasonable Use Variance—Critical Areas Regulations Only: For variance requests related to the critical areas regulations not subject to subsections B7 to B10 of this Section, the Reviewing Official may grant a reasonable use variance if all of the following criteria are met: a. That the granting of the variance will not be materially detrimental to the public welfare or injurious to the property or improvements in the vicinity and zone in which subject property is situated; b. There is no reasonable use of the property left if the requested variance is not granted; c. The variance granted is the minimum amount necessary to accommodate the proposal objectives; and d. The need for the variance is not the result of actions of the applicant or property owner. (Ord. 4835, 3-27-2000; Amd. Ord. 4851, 8-21-2000) 8. Special Review Criteria for Variances from Flood Hazard Requirements in the Critical Areas Regulations: In lieu of the variance criteria of subsection B5 of this Section, the following directives and criteria shall be utilized by the Hearing Examiner in the review of variance applications related to the flood hazard requirements of the critical areas regulations: HAFile Sys\SWP-Surface Water Projects\SWP 27-Transporation Projects(TIP)\I405 Corridor Study\General WSDOT 5 Correspondence\W SDOTFloodplainMemo06032004.doc 4-9-250 VARIANCES,WAIVERS, MODIFICATIONS, AND ALTERNATES: B.VARIANCE PROCEDURES: 1. Authority and Applicability: a. Hearing Examiner Variances: The Hearing Examiner shall have the authority to grant variances from the provisions of those sections of this Title listed in RMC 4-1-05OF where the proposed development requires or required any permit or approval as set forth in RMC 4-1-050H, Review Authority for Multiple Permit Applications, and for variances from the following critical area regulations: ii. Proposals Located within Critical Areas—Flood Hazards: The Hearing Examiner shall hear and decide requests for variances from the flood hazard requirements of RMC 4-3-050, Critical Areas Regulations. b. Board of Adjustment Variances: The Board of Adjustment shall have authority to grant variances from the provisions of this Title upon application to the Development Services Division where no approval or permit is required for the proposed development which must be granted by the Hearing Examiner pursuant to RMC 4-1-050H. The Board of Adjustment shall have no authority to vary the terms or conditions of any permit, recommendation or decision issued by the Hearing Examiner. 2. Filing of Application: A property owner, or his duly authorized agent, may file an application for a variance which application shall set forth fully the grounds therefor and the facts deemed to justify the granting of such variance. 3. Submittal Requirements and Application Fees: Shall be as listed in RMC 4-8-120C, Land Use Applications, and 4-1-170, Land Use Review Fees. 4. Public Notice and Comment Period: Notice of the application shall be given pursuant to RMC 4-8-090, Public Notice Requirements. 5. Decision Criteria: Except for variances from critical areas regulations, the Reviewing Official shall have authority to grant a variance upon making a determination in writing that the conditions specified below have been found to exist: (Amd. Ord. 4835, 3-27-2000) a. That the applicant suffers undue hardship and the variance is necessary because of special circumstances applicable to subject property, including size, shape, topography, location or surroundings of HAFile Sys\SWP-Surface Water Projects\SWP 27-Transporation Projects(TIP)\I405 Corridor Study\General WSDOT 4 Correspondence\W SDOTFloodplainMemo06032004.doc Chapter 3 ENVIRONMENTAL REGULATIONS AND OVERLAY DISTRICTS 4-3-050 CRITICAL AREAS REGULATIONS: B. APPLICABILITY—CRITICAL AREAS DESIGNATIONS/MAPPING: 3. Flood Hazards: a. Increase in Flood Levels Prohibited: Encroachments, including fill, new construction, substantial improvements, and other development are prohibited unless certification by a registered professional engineer demonstrates through hydrologic and hydraulic analyses performed in accordance with standard engineering practice that: i. Encroachments shall not result in any increase in flood levels during the occurrence of the base flood discharge; and ii. There are no adverse impacts to the subject property or abutting or adjacent properties; and iii. There are no higher flood elevations upstream; and iv. The impact due to floodway encroachment shall be analyzed using future land use condition flows. HAFile Sys\SWP-Surface Water Projects\SWP 27-Transporation Projects(TIP)\I-405 Corridor Study\General WSDOT 3 Correspondence\W SDOTFIoodplainMemo06032004.doc r Flooding problems occur at the NE 44t" St/I-405 intersection. An unnamed tributary that once fed into May Creek was rerouted many years ago as part of improvements to I-405. As a result the grade of the tributary is rather flat resulting in siltation from upstream areas which causes flooding on NE 43rd St and Lake WA Blvd. Storm inventory maps and basin plans have previous been provided to various WSDOT teams working on the I-405 coordior projects. Specific as-builts can be researched and provided upon request. HAFile Sys\SWP-Surface Water Projects\SWP 27-Transporation Projects(TIP)\I405 Corridor Study\General WSDOT 2 Correspondence\W SDOTFloodplainMerno06032004.doc CITY OF RENTON PLANNING/BUILDING/PUBLIC WORKS MEMORANDUM DATE: June 3, 2004 TO: Sasha Visconty, WSDOT FROM: Chris Munter, Surface Water Utility SUBJECT: 1-405 North Renton Project Floodplain Issues This memo is in response to your list of questions on floodplain issues in the City of Renton. Regarding the process for obtaining a variance from floodplain regulations, attached is an exerpt from Renton's Municipal Code outlining requirements, processes, etc. Renton uses the 1998 King County Surface Water Design Manual for storm water design requirements. Per the SWDM, 6' of free board is required for streams with greater than 40 cfs flows. This can be lowered to 3' provided requirements of section 4.3.3.1 are met. On the Cedar River, the City requires 6' of freeboard to allow passage of debris during larger storm events. The placement of piers is considered to be fill for which compensatory storage is required if it is shown flood elevations and/or tailwater elevations are increased by conducting a zero-rise analysis. The City does have a HEC-RAS model of the Cedar River that is updated annually as part of the City's monitoring of bed elevations to determine when the next dredging will need to occur and for work being performed on updating the FEMA flood maps. Tabular hard copies of cross-sections are also available for sections of May Creek and Springbrook Creek For additional information from the City's Surface Water Utility Department, contact Chris Munter at 425-430-7205. The City has cross-sections of the Cedar River from just outside the city limits to Lake Washington. These are used in the the HEC-RAS model as part of the City's proposed FEMA flood map revision work and monitoring of the lower cedar river bed elevations. Typical maintenance problems include cleaning culvert crossings and clearing debris from bridge piers during larger storm events. HAFile Sys\SWP-Surface Water Projects\SWP 27-Transporation Projects(TIP)\I405 Corridor Study\General WSDOT 1 Correspondence\W SDOTFloodplainMemo06032004.doc � t From: Christian Munter To: svisconty@anchorenv.com Date: 06/03/2004 9:36:39 AM Subject: City of Renton Floodplain Issues Sasha, Attached is a memo I put together in response to your list of inquiries. Some of the answers are pretty general. As questions may arise and you need more specific information, please contact me and I would be happy to help further. Thanks. Chris Munter Christian D. Munter, P.E. Surface Water Utility City of Renton 1055 S. Grady Way-5th Floor Renton WA 98055 Phone: 425-430-7205 Fax: 425-430-7241 cmunter@ci.renton.wa.us CC: rstraka@ci.renton.wa.us . � - - � � . '� � . '; . . .. . . .. .. ,.. �- f. I � � � i � � , Can the City Verify the Correctness the Following Summary of its Floodplain Regulations? The City of Renton's Floodplain Regulations specify that no encroachments are allowed within the designated floodway unless a registered professional engineer certifies by performing hydrologic and hydraulic analyses in accordance with standard engineering practices that: • the encroachments would not cause any increase in flood levels during the occurrence of the base flood discharge; • there are no adverse impacts to the subject property or abutting or adjacent properties; and • there are no higher flood elevations upstream. Renton's regulations also require that the impacts resulting from the floodway encroachment shall be analyzed using both existing and future land use conditions. Within the 100-year floodplain, no fill is allowed unless compensatory storage is provided. Generally, compensatory storage must be provided within project boundaries, at the same elevation in which the fill is placed. . The City of Renton also requires that project drainage reports include: • A backwater analysis using HEC-RAS or HEC-2 stormwater modeling applications, showing the water surface profile upstream and through any bridge structure, and showing the extent of lateral inundation for 100-year flow. • A compensatory storage assessment, if fill is to be placed in the floodplain. • Floodplain and floodway boundaries shown on engineering plans. Renton Municipal Code [4-9-350] contains provisions that allow a property owner to apply for a variance from the Flood Hazard Requirements in Renton's Critical Area Regulations. The code indicates that variances shall not be issued within a designated floodway if any increase in flood levels during the base flood discharge would result. The City of Renton has also applied floodplain regulations to other smaller drainages that have had hydraulic impacts to the 100-year floodplain, even though the smaller drainages have not received flood zone designation by FEMA. The City of Renton is currently in the process of completing the analysis to update FEMA floodplain boundaries on the Cedar River and on Springbrook Creek. The City hopes to submit an application to FEMA by the end of 2004. I Questions for the City of Renton on Floodulain Issues Permitting What is the process of obtaining a variance from floodplain regulations, and what criteria would be used to evaluate a variance? Technical Questions Does Renton have a minimum freeboard required for 100-year flow for bridges? Is there a velocity constraint for flow through the bridges? Is the placement of piers or scour countermeasures considered to be"fill" in the floodplain for which compensatory storage will be required? Does the City have an existing HEC-RAS model that we can use to examine the hydraulic impacts of proposed structures? ,.,.,,, �k - &,N,- Information Needed: Does the City have this information? L.�.k - pie x,s«. • Name and phone number of a City representative that we could work with on the hydraulic modeling. • Surface water profiles and hydraulic studies, in particular need the cross-sections, flow data and other base information used in the hydraulic models such that we can compare and calculate what impacts the bridges will have on the existing R.P condition. it ,4-A, ck_t�ca�w� • Any new proposals or plans for improvements to the watersheds, stream corridor, new or revised bridges, etc. tr S� - • Copies of the latest basin plans, use agreements, planning studies, etc. 4 • Maintenance problems along the stream corridors • Flooding information, detailed areas, elevations, flows, dates, etc. if available. • Description of channel history, old aerial photos, etc that would help to show trends in channel reconfigurations, watershed development, etc. • As-builts of any outfalls, utility river crossings, and other in-water or on the bank structures within the nearby vicinity of I-405. i i n C c�L alp *" svo I - � � I II I I I I , I i -I _- - I 1 I I l 1 l ji � I � III l Hill I L I , I I I I I ! i i I I I I I I I I I i I II ' � I LAKE WASHINCTON i", N }rn1�. 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RCP 0 --- - ----- --- -- -- - ---- ---------- ----- --, ----- ------ ------ -----, ------ -- ------ -------- ---•• ----- --------- ------------- --- 0 SCAIiEt: 1 i'100 NOR[ZONTAL . .. ) -i 20 VER ICAL:: ....- .. ..... .... - 1....-.. 5B905=N8 bRAINAGE: L[NE . --- ------T ,- ,--- - -- .: .: FREL INAf2Y . .: iNOT F R ;CONSTRUCTION ., : :: .. _...0 . ._ ... .. ... ::A . ..... . .. Lk:IN FORM:ATION:..... N4THINGGUDE:' . :::: ..... . . 0 .. FILE NAME Ct\pwworkin \dmsO2678\8 042oO45d CEVP-3of3 d n TIME 8t57t28 AM REGION STATE FED.AID PROJ.NO. 1-405 CONGESTION RELIEF & DATE 5/16Mo4 BUS RAPID TRANSIT PROJECTS ...._ .. ... .... PLOTTED BY eornestl - 10 WASH mneE DESIGNED BY E.LIOU .. jog p1. NORTH 8TH STREET HOV DIRECT ACCESSSHEET ENTERED BY A DEGU27YWN ___ ..... .. _... EVP 3 CHECKED BY K.HIXSON CONTRACT N0, LOCATION N0. T���. T OF FlA.. _ .. ... ... ...... . _.... _- __ _.... ...._ .._. __ .._ -- _. --. ENGR. R BENITO DRAINAGE PROFILE sears ..._ .. ....... ..._ ._ - _ .... REGIONAL ADM, D.DYE REVISION DATE BY P.E. stun emc A P.E. STAMP OOE DATE �? W lz -TO A o k //: J D�4Z- 40 n �j 1 _ 40 Ex, 6fiZOU D ()G x . X ` �U W 0 30 x w — -- P, W. Leese � g �� I z3•�s► 23• �f-� — — _ -�-- — — 20 2 6q, /G./S /6 0q ! J `/,8Z /So(o ly,gl /S, (Svc 10 10 0+00 1+00 2+00 3+00 4+00 54-00 6+00 7+00 8+00 9+00 10+00 �j 1 / / /- / LINE SURFACE OFFSET N �S T 1�7 4 yy� l\ �y c �(.! ��y� L L topo 0.00 Scaled 10.0000 Times Ver• Scaled 1,0000 Times Hore w 75 � /' I -- - - -I S.4p•1 j 1 D52SI.AC1 LAKE WASHINGTON -� ` JOHNS CREEK e 1 DA 5.40-2 - N 30TH ST. / 207.34 AC _ - N PARK DR. (� I N 8TH ST. - - CEDAR RIVER f \��� - - - - - - - - - - - - - - - - - - ---- -- - --��' � i tea' I - ra It DA 5.43 _ r - IIII ` 67.70 AC NE 3RD RD. s• . f✓ MAPLE ALLEY HWY ~� ; `���, I�54. \ `� 5.3 SR e 1 DA 5.39-1 85.96 AC i /DA 5.0T-2 1 I \ 1- - - i / 73.74 AC I - - - - - -- - - -- - -I / I I 66.86/ACDA 5.07-3 I 1 1 123.16 AC , .39•i \ S.OT-4 � I DA 5.39-2 \ `I I DA 5.07-4 1 15l.93 AC / 116.38 AC \ 1 I \ 1 I � I � \ , 1 LEGEND DA 5.07-5 / 135.85 AC ®LOCAL STREET PAVING ' 1 ®RAMP PAVING I SB I-405 PAVING I- - - - _ - - - - - - _ _ H0V PAVING NB I-405 PAVING SUB-BASIN DRAINAGE BOUNDARY PRELIMINARY - - - FLOW PATH 0 600 1200 NOT FOR CONSTRUCTION SCALE IN FEET ALL INFORMATION NOT INCLUDED FILE NAME Cs\ wworkin \dms02678\exhibit-offsitedrainbasin.d n TIME 3t54t28 PM KCIf1 STATt FED.AID PROJ.NO. DATE 4/6/2004 PLOTTED BY ADeGuzman 10 WASH DESIGNED BY E.LIOU Jos NDNBEN ' NORTH 8TH STREET HOV DIRECT ACCESS ENTERED BY E.LIOU EXHIBIT SHEET CHECKED BY — CONTRACT NO. LOCATION 90. T O.PnbnMl.f TnniP..letlon DF PROJ. ENCR. — DATE DATE OFFSITE DRAINAGE BASINS SHEETS REGIONAL ADM. - REVISION DATE BY P.E. STAID BMP.E.STAID BOX To23No Ro5Eo w . m . N 8TH ST. NB405 BR 32327 SO FT N PARK DR. {r `II I N8 SB RAMP DA 64867 SO FT I SB N8 DA I104 49882 SO FT I NB N8 DA I105 72551 SO FT N8 125750 SO FT SB&NB N8 DA I103 702799 SO FT N8 BR DA 13009 SO FT c t �.. •j.t:': ,.yk' .X';r "k'is• .Xi Lt N8 DA I102 105812 SO FT N8 DA I101 290110 SO FT PRELIMINARY NOT FOR CONSTRUCTION 0 200 400 ALL INFORMATION SCALE IN FEET NOTINCLUDED FILE NAME C:\pwworking\dms02678\exhibit-N8thOnSiteDroinogeBosin.dQn aEc�a STATE 1-405 CONGESTION RELIEF & TIME 4E2207 PM „o FED.AID PROJ.NO. DATE 5/14/2004 PLOTTED BY eornestl t0 WASH BUS RAPID TRANSIT PROJECTS DESIGNED BY E.LIOU JOB W.01111a NORTH 8TH STREET HOV DIRECT ACCESS ENTERED BY E.LIOU EXHIBIT SH;ET CHECKED BY — CONTRACT NO. LOCATION NO. TwwYrro•we OF V/aoua..n ae irrP.n.wr PROJ. ENGR. — DATE DATE NORTH 8TH ST. HOV DRAINAGE BASIN SHEETS REGIONAL ADM. - REVISION DATE I BY I P.E. STAID oft P.E. STOP 901 e Storm Drainage Review with Date: Feb. 6, 2004 Time: 8:00 AM City of Renton Location: City Hall, Floor 5 AGENDA PROJECT: I-405 N. Renton Section and N. 8"' HOV Direct Access Projects Objective: Coordinate the drainage improvement proposals for the subject WSDOT project with the City of Renton. Review impacts to City of Renton's existing facilities,including existing drainage lines and the Gene Coulen Memorial Park. 1) Overview of the I-405 N. Renton and N. 81h HOV Direct Access Projects 2) Discuss the N. 81h HOV Direct Access Project storm drainage proposal. Include general description, impacts to City drain system, outfall to Lake Washington at the park, utility conflicts, potential problems 3) Review the overall I-405 N. Renton section drainage concept. Include impacts to the City drain system, potential problems, known flooding problems, etc. 4) Schedule 5) Other issues and follow up actions. `I a ,o��ss ,✓����-sue Syb�� �� ��' Sys W dJ� 7-1 - 1 (--------- - Q`.-.-- 206 - W68- 7 8t 8 --- CZ UJ , ✓5 - ------- v�-�3 d ?��----------- - Ll 3 O S� p 8 , - 1 rlAO af � 0 --A A 041 51 N C )-••xud .,� ,.,�, �✓ Ir t 17�?3- 2 I , + 7777y , 1 Y i'a+ 11 j Iwr. - .y, I .-,.� - too sv' 6 ntl •S4� 1w�." i .Jt 1. �f- 1L x•i')j!R R � �T •ai .F y" �� J'°r't�Ta� � r�,_ t`- �� � ��_ � i • .`•<.A.' _X", w ,..fit • ,;.may ,,�• '.� s fA,�iir. w? .6 _ _ '•YI'. :44 it r r�(qIV r, f=�G •�: �i M. �µme' "d .'�, 'v• v J' � r .•I .. t "a s i •t r'�St �;.'� y3Y,F ,�, .yi�. cr 1 ;y'. { .. ��- .. - � � - _ Sri•. t =, AA - �1`'as*t;. Ar ..; ;yf y .�•.,� T� at �: �.r. aft' ti: � - '�x VS tv VV -41 71 h '�-� 5•.� - .. �•. � �`'.. try). �'; r-'f `� rri r a4•, -"`'�, ^f Y'----erg r'i �^; S �.'° _ gc.-P _ �,• '' .. 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PACCAR �•' �E — ' _ �r� � I I >t\` '��\[�� t, ��, _ —,fir n � � 1�kf q L T' - - �•�.•Ci�7 - � `.J,� - - _•-/• i �•���cIT-4.��� + J1:�'I'I + p � ..b='. (�f�w� 1 //DLA i�+• • 41 pp 1-405 CORRIDOR PROJECT N 8TH ST HOV DIRECT ACCESS PROJECT I— 1 1I • I ---------- f ,I � _ S I I I`II i r_�� r . y� ��- /,. �, UTILITY CONFLICT IDENTIFICATION - FIG. I FRY"S ELECTRONICS u � � " � \'`\ ys� `,' •' 1'�'\mil � ` o — ;� .:1•'. 15 L =BL— .a=B-T—crBT—sBT —BT—BT=— r ~' —BT——IL.T--HL�—R1--Bj--4—BT——BZ- .—Win.--,ma+�,��� -•- - Vl— —'J——9---9--•9--'J —'�--9 G——G + F — — TL-s-- -- -s--s--s--s--s--s--s-- --s--s--s=-s- s--s- - - �- -- -- 8-C1 - _- -- - - - =-c'-T \ }2 -- Y T © - --__-------B-P--=gS_ —x—x -x- - -x--x- - -- - -x-- M — — - - - - - --—_-B-——_--_------------_—---- I-4�05�RO/W$At /\ \ 4- \ PR ECT x I x � LIM TS 'mow UTILITIES WITHIN LIMITS ®i Ww SYMBOL TYPE ASSUMED OWNER G GAS PSE I �z aw• ! �,� }, may` BP POWER PSE 3 i '� P I 1 PACCAR BT TELEPHONE QUEST PARKING L - --.-- - - - --- - - - - - - '+ W WATER CITY OF RENTON I `` S SEWER CITY OF RENTON } CROSSING BNSF RR TRAFFIC CITY OF RENTON x-L 1X�-x-u 't PLAN VIEW N.T.S. I-405 ROW I NB I-405 PROPOSED N.BTH ST. PROFILE GRADE U BNSF RAILROAD ISB I-405// „ z a FACE OF WALL / - u PACCAR & FRY'S ELECTRONICS DRIVEWAY �HOUSER WAY N ABUTMENT GARDEN AVENUE NORTH CLEARANCE 23.5 CLEARANCE CLEARANCE. / 16.5 MIN. - - - - - - - - - RETAINING PIER �EXISTING GRADE T( YP. MALL ) ABUTMENT ELEVATION ALONG N 8TH ST N.T.S. (SCHEMATIC ONLY) 1-405 CORRIDOR PROJECT N 8TH ST HOY DIRECT ACCESS PROJECT UTILITY CONFLICT IDENTIFICATION - FIG. 2 N8TH HOV FL N8TH HOV WB EB N 8TH ST N 8TH ST PI R WB I EB TYPICAL ELEVATION LOOKING WEST N BTH ST I N 8TH ST (AT RAMP) TYPICAL ELEVATION LOOKING WEST (AT STRUCTURE) 1-405 CORRIDOR PROJECT N 8TH ST NOV DIRECT ACCESS PROJECT UTILITY CONFLICT IDENTIFICATION - FIG. 3