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HomeMy WebLinkAboutTIC 2020-04-06 Item 2C - Grant Application - Gilliam Creek Fish Barrier RemovalCity of Tukwila Allan Ekberg, Mayor Public Works Department - Henry Hash, Director INFORMATIONAL MEMORANDUM TO: Transportation and Infrastructure Committee FROM: Henry Hash, Public Works Director BY: Mike Perfetti, Habitat Project Manager CC: Mayor Ekberg DATE: April 3, 2020 SUBJECT: Gilliam Creek Fish Barrier Removal Project No. 99830105 Grant Application ISSUE Authorize the submittal of grant applications to Recreation and Conservation Office (RCO), the King County Flood Control District (Cooperative Watershed Management funds) and other future grants that become available for the Gilliam Creek Fish Barrier Removal Project. BACKGROUND The primary goals of the Gilliam Creek Fish Barrier Removal Project are to restore fish passage between Gilliam Creek and the Green River, restore salmon habitat, and maintain or improve flood protection. The current 108" flapgate would be removed and replaced with flood protection more suitable to fish passage. DISCUSSION In 2018, the City and NHC consultants completed three conceptual alternatives (see attached). Staff initially preferred Option 2, the middle -of -the road option, as it appeared to meet project goals within a reasonable budget. However, after review by both the State Fish Barrier Removal Board (FBRB) and the Salmon Recovery Funding Board (SRFB), both granting agencies indicated the willingness to only fund a modified version of Option 3, with a flood wall rather than a self-regulating tide gate. Estimated Design Cost Estimated Construction Costs Option 2 $390,000 I $1,800,000 Option 3* $1,800,000 $6,000,000 * Modified Option 3 has not been estimated WRIA 9 has selected to support this project to support within its current cycle of allocated SRFB and CWM funds. Following the initial review, FBRB will be inviting select proponents to submit a grant application via RCO. FISCAL IMPACT A 15% match is required for the SRFB and FBRB grants. There is no match requirement for CWM. The intent is to use all grants to match one another, wherever possible. The Gilliam Creek Fish Barrier Removal Project currently has $554,000 budgeted in design with $324,000 in grant funding and $229,000 in Surface Water funding. RECOMMENDATION Staff recommends seeking feasibility and design funding for modified Option 3, and Committee approval to submit grant applications for RCO, CWM, and other funding sources for the Gilliam Creek Fish Barrier Removal Project Attachments: 2019 CIP, Pg. 99 Gilliam Creek Fish Barrier Removal Feasibility Analysis and Conceptual Design, NHC, 2018 W APW Eng\PROJECTSW- DR Projects\Gilliam Creek Fish Barrier Removal (99630105)\Grants\Info Memo_Gilliam Creek grant app_20200403.docx 15 CITY OF TUKWILA CAPITAL PROJECT SUMMARY 2019 to 2024 PROJECT: Gilliam Creek Fish Barrier Removal Project No. 99830105 Construct fish passage improvements at existing flap gate location and replace/modify the flap gate DESCRIPTION: which may include a self-regulating tide gate. JUSTIFICATION: Enable fish access to lower Gilliam Creek under wider range of flow conditions. Analysis of lower Gilliam Creek is being conducted in 2018 to determine the best solution for fish passage STATUS: and to address potential flooding. MAINT. IMPACT: Expected to have an increase in monitoring/maintenance. COMMENT: Grant proposals to State RCO and KC Flood Control District. FINANCIAL Through Estimated (in $000's) 2017 2018 2019 2020 2021 2022 2023 2024 BEYOND TOTAL EXPENSES Design 39 22 554 110 725 Land (R/W) 0 Monitoring 15 15 15 45 Const. Mgmt. 200 200 85 485 Construction 1,000 1,000 550 2,550 TOTAL EXPENSES 39 22 0 554 1,200 1,200 15 15 760 3,805 FUND SOURCES Awarded Grant 0 Proposed Grant 325 1,020 1,020 500 2,865 Mitigation Actual 0 Mitigation Expected 0 City Oper. Revenue 39 22 0 229 180 180 15 15 260 940 TOTAL SOURCES 39 22 0 554 1,200 1,200 15 15 760 3,805 Project Location 16 2019 - 2024 Capital Improvement Program 99 GILLIAM CREEK FISH BARRIER REMOVAL FEASIBILITY ANALYSIS AND CONCEPTUAL DESIGN Prepared for: City of Tukwila Washington Prepared by: Northwest Hydraulic Consultants Inc. Tukwila, Washington August 16, 2018 NHC Ref. No. 002002976 17 1 BACKGROUND Gilliam Creek is a spring -fed creek that emerges from the City of Tukwila's (City's) hillside neighborhoods situated between 1-5 and Sea-Tac Airport (Figure 1). It is an urban stream, flowing among a network of roadways past the commercial hub of Tukwila's Southcenter Mall and into the Green River. The lower reach of the creek flows parallel to Interstate 405 before crossing under 661" Avenue S and discharging to the Green River through a 108-inch diameter top -hinge flap gate. Several species of anadromous fish, including Coho salmon, Chinook salmon, and sea -run cutthroat trout, are reported to make use of the lower reach of Gilliam Creek. Access for fish to Gilliam Creek is severely hampered by the flap gate (Photo 1) and splash pad. The City desired an alternatives analysis for the removal or modification of the flap gate to increase fish access into the creek, while maintaining or improving existing flood protection. Alternatives were to also address recreational, aesthetic, and educational opportunities associated with the adjacent Green River Trail and trailside park area, and constraints including adjacent commercial properties, local roads, and 1-405. IN r { e h 1 � r f f 1 % I•f � ts � ti . ;s 518 $ y Grlfiam Creek 1 So�thcenler r Mall i - � + 1 + l I Sea-Tac 99 ■ t*{ Airport j + CC2TdC J % 4 F` —I Tv I.— ila + I J + 1 � c +>1 i 0 0.25 0.5 1 Miles Figure 1. Location map (approximate watershed boundary shown with dark red line). Gilliam Creek Fish Barrier Removal 1 Feasibility Analysis and Conceptual Design August 16, 2018 18 Photo 1. Existing Gilliam Creek flap gate, wing walls, and splash pad. Millions of juvenile Chinook salmon pass by the mouth of Gilliam Creek each spring. These fish originate at the State's Soos Creek hatchery, as well as from natural production throughout the Green River Basin: the hatchery alone releases approximately 300,000 yearling and 3.2 million subyearling Chinook salmon each year. Estuarine habitats are important to juvenile Chinook in part as a transition zone between fresh and salt water, but also as rearing habitat where significant growth occurs. However, Duwamish (Green River) Estuary habitat has been largely eliminated to make way for urbanization and industrialization of the Seattle Metropolitan Area. Without available estuary habitat, smaller creeks and creek mouths, including Gilliam Creek, take on an added significance and importance for rearing juvenile Chinook. In recent years, research has indicated a strong propensity for juvenile Chinook salmon to enter and rear at the mouths and in lowermost sections of small streams. This is true both for small streams leading to larger freshwater environments such as Lake Washington (Tabor et al., 2006), as well as those discharging directly into Puget Sound (Beamer et al., 2013). The greatest opportunity for assisting with the recovery of listed fish species at Gilliam Creek is to increase short-term rearing opportunities for downstream -migrant juvenile Chinook salmon by improving access to existing habitat as well as improving habitat quality. Gilliam Creek Fish Barrier Removal Feasibility Analysis and Conceptual Design August 16, 2018 2 im Photo 5. Trash rack and debris at the inlet of the 66th Avenue S culvert. f 4 Photo 6. Looking upstream from near the 66th Avenue S culvert inlet. Gilliam Creek Fish Barrier Removal Feasibility Analysis and Conceptual Design August 16, 2018 I 20 Figure 5. Option 3 Daylight at 66th Avenue S vignette. Gilliam Creek Fish Barrier Removal Feasibility Analysis and Conceptual Design August 16, 2018 22 3.3 Permitting Each design option was evaluated based on which city, state, or federal permits might be required, as well as Tribe consultation, and for each agency whether the specific design aspects of the project will benefit or make more complete the permitting process. This assessment is tabulated in Table 2 and Table 3. 3.4 Cost Estimates Table 1 summarizes the planning level cost estimates for the three alternatives. Cost for the floodplain restoration upstream of 66th Avenue S is the same for all options and is listed as so in the table; however, the design concept is slightly different at 66th Avenue S for the flow control structure there in Option 3. Since that flow control is necessary regardless of whether the upstream floodplain is restored or not, the cost of that structure is lumped with the main Option 3 cost. All three options assume a 30% contingency cost. Table 1. Summary of cost estimates (rounded to two significant digits). Option 1 — Retrofit Existing Culvert Main project cost Estimated Cost $ 290,000 Floodplain restoration upstream of 66th Avenue S $ 270,000 Total for concept design O. Daylight at Trail Main project cost $ 560,000 Estimated Cost $ 1,000,000 Floodplain restoration upstream of 66th Avenue S $ 270,000 Total for concept design $ 1,300,000 O. Daylight at 66 1h Avenue S Main project cost Estimated Cost $ 5,700,000 Floodplain restoration upstream of 66th Avenue S $ 270,000 Total for concept design $ 6,000,000 4 EVALUATION The project alternatives were evaluated with their ability to meet the five metrics established for the project (Section 3.1) and are summarized in Table 4. Gilliam Creek Fish Barrier Removal Feasibility Analysis and Conceptual Design August 16, 2018 21 23 5 SUMMARY Gilliam Creek is a spring -fed creek that emerges from the City's hillside neighborhoods. Several species of anadromous fish, including Coho salmon, Chinook salmon, and sea -run cutthroat trout, are reported to make use of the lower reach of Gilliam Creek and millions of juvenile Chinook salmon pass by the mouth of Gilliam Creek annually. However, fish access to Gilliam Creek is severely hampered by a flap gate and splash pad at the confluence with the Green River. Option 1 is the simplest of the three, retrofitting the existing flap gate with an SRT, that would significantly increase the time duration of a connection between Gilliam Creek and the Green River. A roughened channel between the MTR and the Green River would also improve accessibility to Gilliam Creek. Option 2 is similar in design to Option 1, except adds an approximate 20' bridge crossing over the creek and replaces approximately 30 feet of the existing culvert with a roughened channel, v. Option 1 where the roughened channel is added at the end of the existing culvert. Both Options 1 and 2 include approximately 300' of restored stream channel and floodplain upstream of 66th Avenue S. The third option, the most complex of the three, includes this same restored floodplain area, replaces the entire existing culvert, and reroutes the creek through both a new bridge crossing underneath 66th Avenue S and through new additional added habitat in a widened Green River overbank area. All three options meet the five evaluation criteria (Table 5). Options 1 and 2 are similar in how they meet the objectives, except Option 2 includes more aesthetic and educational features. Option 3, compared to Options 1 and 2, provides much more fish friendly access to Gilliam Creek including complete replacement of the existing culvert with a restored channel, adding additional habitat along the bank of the Green River, and creating a much more aesthetic environment for trail users. Table S. Simplified evaluation of how options meet objectives *Assumes all options include the restored channel and floodplain upstream of 66th Avenue S. Relative simplified ranking: I E Excellent G Good F Fair Gilliam Creek Fish Barrier Removal Feasibility Analysis and Conceptual Design August 16, 2018 25 24 \` I I I / I IIII /I 11I 1 \I iI II II lI 1I 1I 1i r 11 nIl II II II � onI 'n �I \ \\ \\2:1 GRADING LIMITS �\ FALL PROTECTION I 1 \ \ \ \\ \ 1\ \\ \\ 1 1 i l l l i l i l iiii Ds I BARRIER , >� I I i 11 \ ENGINEERED SLOPE 1:1 ROCKERY OR OTHER, REVEGETATE BANK EDGE OF \\ i i i i 11 11 i 11 IIII 1 li li II II W W 1 / I / r r r r / \ \\ WITH NATIVE SPECIES PAVEMENT \\ I i/ i i i i / i i 11 IIII 11 11111111 Ili 11 W W W IW 1 I III r r r , , \il REVEGETATE ALONG CREEK BANK AT OUTFALL � < I W EXISTING RETAINING WALL II I _ I 1 I i I I 111 I I III 1 C I I r r / SUBSTRATE FOR FISH —PASSABLE r r l / ROUGHENED CHANNEL TO CONSIST OF GUARD RAIL i r I i I i i i i C \ \ I i W r ; ROUNDED BOULDERS AND COBBLE TO FORM W W CASCADES AND RIFFLES VERTICAL WING WALLS I ADDI IONAL�. WOOD �p �`� i i (ROCK TEXTURE) I i i ALONG DAYLIGHTED CHAN EL SECTION I \\ 1\� \\\\ I \ �\ d, NEW ROUGHENED \\ CHANNEL 2 1 1 1 I I NEW SIDE —HINGE I I \ \ \\ I II 11 11 I I FLAP GATE II \I \\ \ �� M� \I 1\ SIDEWALK \\\ \\ \ 1 1 \ \ \ \ \ \\ \\ \\ \ \\ - - ' LOG JAM HERE TO — \ STREAM 1 I \ \ \ \ \ W\\� \ y y r\ \ y \ \ \ ACCENTUATE EDDY AT MOUTH 1 1 \ \ \I \I 1 \ 1 1 \ \ \ \ \ It \ 1 ADD LOW HEIGHT SILL \ — _ \ \ \\ \\ \\ \ REMOVE 30' LF EXISTING FOR INCREASED LOW \ \ \ I ` \ \ ` \ \ \\� CULVERT, HEADWALLS, FLAP \ I I \ 1\ \ \ 1 FLOW DEPTH \ \ I \ \ \ 1 GATE AND SPLASH PAD \ 1 ENGINEERED SLOPE 2:1 ROCKERY OR OTHER, REVEGETATE BANK BRIDGE DECK f20' 1 \ v v WITH NATIVE SPECIES 1 Z � \ ` \ \ GRATED FOR LIGHT TRANSMITTANCE VERTICAL WING WALLS (ROCK TEXTURE) 24"X36" INTERPRETIVE SIGN �o 1P \ \ CITY OF TUKWILA Job:2002976 GILLIAM CREEK FISH BARRIER REMOVAL Rev: 7 6300 SOUTHCENTER BLVD. 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GILLIAM CREEK FISH • • 11 BARRIER REMOVAL nhi. 6300 SOUTHCENTER BLVD. SUITE 100 northwest hydraulic consultants 0, 15' 30' 60' x4 1 1 •� �� d 12787 gateway drive south N • 0 OPTIONDAYLIGHT 66TH AVE 1. 1 J D.CONCEPT �_ f_/ �� / /•' �--_'__,- I I 11\\ III I I rl III ___ I 1\\\ \\\\\ I\\\ IIII IIII 1 \\ \ \ 1 \ \ hill\ '�f /—'/ _�'� /—r J t� �'/ ` • '� "` \\ \ \ \\IIII IIII I I11 1\\\ \ \ \I\ \\\I\\ \ lit" r'' r ��\55 CO `J1,;_'-' - REALIGNED \I\�\\\II I,\\.\ \\\\ \t\\ \\I\\\I t\\\ p /� /^ / �\� \ _ l /r I \ 1\ \ \ \ 1 1 I `o - / _ _ CHANNEL \ SLOPE TRANSITION \ \ I II I -��_ 1t \iS`\\\`\\I Ilk, \III \\\ '— J 30 _ /— rj—;��_ ram•— •• r \l . .. . I \\ \ \ ENGINEERED 1:1 SLOPE \ o NATIVE VEGETATION `' 1--`-` \\\ \ \\\\\ _I , �C;` \\ \ \\ WITH VEGETATION THROUGHOUT AND \\\ MAINTAIN EXISTING \, \\\ \\ TREES WHERE POSSIBLE 1\\\ \\\\ts\�\\ \\\\I\ `� S \\ \ \\ \\\\ \ O\ \ / r✓i i dr ' 1 \ \ p \ \ \ \ 1 \ \ \\ \� \ \\ADD FLOODPLAIN \ I` /'-�- !%'s• -. s \ III BENCH \\ \\ \\\\\\ \\\\ III \ \ EXISTING \/ \\�11 1�...� CULVERT -'- - ENGINEERED 2:1 SLOPE' - '—I r^\ \ r- �`-`-`- - - - -` ti \ 11 \� r, ( a ... .... . ..... . .. �\ _ \_ \I REMOVE \ o / WITH VEGETATION /( \ \\ \ \ '�' iI j'.�, K� :�` '.` r. `- r - \I \1\ \I\I\RACK \ \ \ 5 - \ \� \ \ I .�+ Z/ CJ` ". �+ �. ��—=ii%iy_'=/�/,��y/—__—/\ — i.•-.'.r_fa . .f _�—� _ r � i—.—.- _— _ _ — — �_ 15 it \ / \ \ XS \ \ // ADD FLAP GATE' -i— REMOVE EXISTING _,- CHANNEL == SEE SHEET 4 FOR — `I �_==— __ _____-_�- _--------- "_ ,_= CONCEPTUAL SLIDES/- - ADD BACKWATER - ram- --- - GATE DESIGN' __ _- _ _-_;=-=- _ __-_ -_--_- _ -FILL EXISTING _� FLOODPLAIN _� � / `_ �v� � ! /'� EXISTING' \\ = _ =2_0- _- = =_ = ___ � _ CHANNEL---- BENCH- ,��., CHANNEL -\_-_,/-` i I i k II 1 \I ________________'------ _-- ------------- CULVERT -�_—_-- -~� 25.�—_---_--------------- ---'I ~�--�--- _ �� ADD BACKWATER i NEW SPAN-- ----�---- '--_---- _-----_------ - ----- --_ -- - _-'___-\ --- _ _ - CHANNEL BRIDGE\I COS / /' /�/// -------APPROXIMATE / --r APPROXIMATE LOCATION OF 60" �J\\ GUARD RAIL CO WATER MAIN r TUKWILA PARKWAY ------------ EXISTING PIPES ------------------ � I \ CITY OF TUKWILA nhc Job:2002976 GILLIAM CREEK FISH BARRIER REMOVAL 0' 20' 40' 80, Rev:7 6300 SOUTHCENTER BLVD. SUITE 100 norrthwesthydraulic cmm12787 gateway drive ttmb N Drft:MAO OPTION 3: FLOODPLAIN RESTORATION TUKWILA, WA 98188 tukwila, washington 98168-3308 phone: (206) 241-6000 SCALE 1" = 40' chkd: (WITH NEW SPAN BRIDGE FOR fax: (206) 439-2420 1 Date: 15Aug18 DAYLIGHT AT 66TH ALTERNATIVE) SHEET 7