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Home My WebLink AboutCAP 2014-06-24 Item 2A - Discussion - Duwamish Hill Preserve Design UpdateTO: City of Tukwila Jim Haggerton, Mayor INFORMATIONAL MEMORANDUM Mayor Haggerton Community Affairs and Parks Committee FROM: Rick Still, Parks and Recreation Director BY: Dave Johnson, Recreation Superintendent DATE: June 18, 2014 SUBJECT: Duwamish Hill Preserve Design Update ISSUE Update Community Affairs and Parks Committee on the progress of the design of Phase II at the Duwamish Hill Preserve. BACKGROUND The City entered into a Consultant Agreement with SvR Design Company in April 2014 for the design of Phase II at the Duwamish Hill Preserve. Attachment A shows the different phases. We hosted a public Design Open House on May 15, 2014. The general public was invited as well as those that attended the Grand Opening of Phase I, residents that live with '/z -mile of the site, and community partners and friends of the project. Attendees were provided background information on the site along with the work that's been done. They were also given the opportunity for input and feedback on a variety of items including interpretive elements, experiences by season, restoration types and techniques, and stewardship opportunities. DISCUSSION The consultant has taken the information gained from the Design Open House and has prepared the attached draft designs (Attachment B), including background information. RECOMMENDATION The Community Affairs and Parks Committee is being asked to review these designs and offer input to be considered for the presentation by the Consultant at the July 14, 2014 Committee of the Whole meeting. ATTACHMENTS Attachment A: Phasing Attachment B: Draft Design Concepts PHASE 1: THE CENTRAL HILL neighborhood trailhead, some interpretive markers, trails, entrance bridge, stacked rock amphitheater, seatwalls at upper viewpoint, invasive plant removal and native restoration, interim parking and arrival area PHASE 2: RESTORED WETLAND, TRAILS, AND BUFFER more interpretive markers, wetland restoration, vegetative buffer and sculpted Iandforms, ICI wetland boardwalk w PHASE 3: REALIGNED ROAD ND RESTORED SHORELINE more interpretive markers, realigned South 115th Street, _realigned with green roof and _constructed wetland treatment system, bioretention swales, - riverfront shoreline and beach restoration with hand boat lauch, �- welcome plaza, entrance path, porous concrete sidewalks, streetside permanent parking SCALE: 1"= 120' -0" Q cnR T AND SHRUB BORDER C t . PRAIRIE W ETL.A C C pREST AND SHRUB BORDER DHP2: CONCEPTUAL OPTIONS Duwamish Hill Preserve 19 June 2014 SvR team 01 0) 0 l+ earth imager-y Date 5i4/2013 97°30'04, B2° N 22 L 3 3_I" V, e lee 24 ft eye;,alt 1110 ft y�,1 Context Habitat Spectrum & Research Possibilities Wetland 1 Magnuson Park, Seattle, WA CD Beaver Creek State Natural Area, Seal Rock, OR How does harvesting influence ecology? How can harvesting support culture and be a viable practice? crs'l NatureMap,p+r_ What are the most important establishment factors? W Seven Oaks Nursery, Albany, OR Platte River Habitat Partnership, Wood River, NE Camas Meadows Natural Area Preserve, Leavenworth, WA How does fire management improve ecology? How does grazing compare as a management practice? • 1 Are there mowing regimes that are as effective? OP' WHY iS Till Ttaiiriad E GRASS TALL HERB part ad m artIPHIK P mie<r 10 roAue# aenazza, AYr mowed & an, awa fieldalLeg. and tAtr ems f /amyl, jYrtniuitla:ll T hh flaid area a hayfield' up tax a 01:15.,6 and A eA +Tla�.rd li4r LO a Wahl w l rr.dlll a P1 Fuel ecr and OW pr eak ,a, nhalaca TFra hey will kre rrlrv+a ;TD-r41 marl' Co week on eche, ! rdanr . 4y Aar the stin ur This , r lT ra habitat ,rda we ai,2551 ., SFwrruvs acid %pe rows wn.ch Madaathu.n!ta S7asaL xs�:Ttaiulx,.. ntr,ES B r R.005 WERE PlOPING TO ATTRACT: Vesdr Sparrovoe Eas[ern tle8dowJark BatiboJ ik tgaimawnier wile ve. r>< 5.aa A If3" :- 11 r...4 A ygr. II IS alma ccr,v,.'WW1 wh.er qs r,rg . 1 • I n,1 par h ei slmcrum rar h.rA eN w.% S Y o-. s• a I' 03.7H arl l calk t ,.$ pJk il.au •rEl 13rea56 hlul'4 [orrery Iir.mws .�• • d I, }d7 cn1 El i wr.rov 1nal.. .Yrd.Fj & .z n.c F..rml..r.1 •i+,s.. crab nd bof -y !a w. nmakaS are 1.0. 1M eras v .r r r,,: r. /Auk kir s 14-e ei 1,41 act, Pak ..,i +4__ pcbmsel. mow••:m a..,l tw•10.4 yye a/e1 fird rsea.,rca Mass Aa i.c1 5:30.tct r -n. I r.. £' 1.x'77 I14'7,vIb-r W rip, A Are there effective "no mow" mixes? Prairie Johnson Prairie at JBLM, Fort Lewis, WA Prairie Mima Mounds Natural Area Preserve, Olympia, WA What impact does camas harvest have on the ecology? 1 P ] � � } How c a n harvesting support culture and b e a viable practice? Playfair Park, Victoria, BC , ■-p; , , ' "fits .,Y 01 Uplands Park, Oak Bay, BC How do topography and aspect influence establishment? Planting Implementation Planted distinct structural zones to encourage habitat creation and help provide hospitable microclimate conditions for installed plants. Nucleation Build Plan MJikh Layer IMIOak Prairie Matt Shrub Duller Matrix •Ocean Spray WNootka Rose Buffer Nucleation Site Nucleation sites encourage the growth and eventual dominance of native grasses and flowers. What is the potential for applied nucleation? Cedar and other trees with traditional uses N) CO Salmonberry and other native edibles _ _ - i....T:0707 — — OW NW watirgiow k How can plants support storytelling? What is the best way to experience these habitats in terms of formal structure, circulation & interpretative elements? Habitat zones Qiaoyuan Wetland Park, Tianjin, China 000%-- c+llr..;‘,5�e •a..i:.r� 01 Magnuson Park, Seattle, WA k . -vd ._iii;_ '"; -4L Mima Mounds Natural Area Preserve, Olympia, WA Circulation WORK SHED AREA ROOM BIRD BLIND WELCOMING GATEWAY STUMP BENCH, TYP PROGRAM SHELTER AND INTERPRETIVE FLOOR RESEARCH MARKER, TYP Interpretive elements The Tree Grove MEI& me Fenced; d P slope epee the Tress a Praepect W rk W Welcoming gateway Research markers Central program structure --"Diwyw r' er1 ow" - r- - - ' ..., -oe . • Interpretive floor "Room" bird blind Stump seating FOREST AND SHRUB BORDER Habitat zones ' ? - 1; • .4; Waterworks Gardens, Renton, WA Minhu Wetland Park, Liupanshui, China Storm King Wavefield, New Windsor, NY Circulation LINEAR BIRD BLIND PROGRAM SHELTER AND WORK SHED AREA WAYFINDING SCREEN PLANT & SEASON SIGNPOST, TYP CANOE BENCH, TYP Interpretive elements CJi N Wayfinding screens Salmnnberry Re) bus spec[abd us Fresh salmonberry shoots were a welcome early spring food after a long winter of dried food. One of the earliest berries to ripen, salmonberries were eaten fresh as they didn't dry well, If -Lirk#r Vet Plants and seasons signposts 01 Edge program structure 01 01 "Linear" bird blind Canoe seating The Sponge SAVANNAH PRAIRIE FOREST AND SHRUB BORDER The Dragonfly Wing Q 0AVANNAH‘ 'S I Q PRAIRIE FOREST AND SHRUB BORDER Let's compare!