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Home My WebLink AboutCAP 2014-10-14 Item 2B - Update - Duwamish Hill Preserve Phase II Design with SvR Design CompanyTO: 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: October 8, 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 has contracted with SvR Design Company for the design of Phase II at the Duwamish Hill Preserve (Attachment A: Updated Concept Design). We have hosted a public Design Open House and have had input from stakeholders. The consultant has been working on the design concept and development, and we are currently in the Design Development phase of the project (Attachment B: Project Design Schedule). DISCUSSION The majority of funding for this project is via grants awarded to the City and Forterra through the Washington State Heritage Capital Project Fund (attachment C: Cost Estimate). In addition to the Project Design Schedule, we are also working on an Archaeological Survey RFP which will focus on the Phase II areas of the flat northern and western portions of the property. We anticipate going to construction bid in February /March 2015 with project completion in June 2015. RECOMMENDATION This item presented for information only. ATTACHMENTS Attachment A: Updated Concept Design Attachment B: Project Design Schedule Attachment C: Cost Estimate 19 LT 1,2 SEC 10 TOWN 23 RANGE 04 CITY OF SEATTLE TRANSMISSION LINE RIGHT -OF -WAY LOCATION OF FUTURE SHELTER +r ++18* ++ ++ -7F8- - i 0— ; FUTURE STAIR i — �' ;�� i %S ill ii`i�'y i!' 11 \IlI 111 I \ \ \ \P / \ \\ aExeN -,arn - I / ' 1,1�IIII11. TIN \\\ f //i � j I I 111 111j 1 nv II�IN'�wv v�` c �� v� / 1 1 ',11 ``v0. I 1 / \ \ *2_ OKl p07( vAG '8- 9 1 TONE A.1.14ME13.1 \ \a\ 1 I I � \ 71 \ N \ M S EG13.E L MA ACCESS GRAVEL DRIVEWAY' I WORK OUTSIDE OF I200' SETBACK FOR SHRELINE o a \`mod eo ASPI LOT 2 BOOK 167, PAGE 8 -9 I ce 30 15 0 30 Scale In Feet LEGEND 310 Natsaittfill PROPERTY UNE DUSTING CONTOUR PROPOSED CONTOURS MSE WALL GRAVEL PLANING LEGEND AAAAAAAAA LAWN SEEDED MEADOW GRASS ARBORIST WOOD CHIP MULCH AND BUFFER TREES (SHRUBS TO BE INSTALLED BY VOLUNTEERS) SAVANNAH PRAIRIE WET MEADOW WETLAND PLEASE 3 Workin BEFORE 1 -800 -3 DESI6I (GMPIIrY Duwamish H i II Preserve - Phase Project Design Schedule =•-- September 22, 2014 - -- Task Dates Task Description Deliverables 1 Concept Design (Task Complete July 2014) 2 Design Development ( September • October 2014) Oct 1 -15 Meet with tribal representatives regarding cultural gardens idea and identify suitable species for ethnabotanical use and interpretation meeting minutes Oct 1 -15 Meet with UW Center for Urban lion faculty regarding ecological experiments idea and identify low -tech restoration practices that would be of value to demonstrate and monitor on this site meeting minutes Oct 15 -29 Develop detailed grading and drainage analysis, including earthwork calculations and evaluation of the su tability of excavated material reuse as fill for visual buffer landforms and upland plantings. grading & drainage plan, paining & hardscape plan, planting plan Oct 1 -29 Prepare restoration palette restoration palette memo Oct 15 -29 Prepare preliminary drainage calculations prelim drainage design memo Oct 15 -29 Develop interpretive strategies interpretive strategies merry 29-Oct Meet with city and hill management team to review findings from tribal and restoration community outreach and select appropriate implementation pathways meeting minutes Oct 15 Nov 3 Update cost estimate cost esti mate 5 o Prepare fins! design development drawings cover slkeet, grading & drainage plan, paving & hardscape plat. planting plan, section sheet, detail sheet 3 Construction Documents 50% (Nov - Dec) 4 Construction Documents 90% (Jan 2015) 5 Construction Documents 100% (Feb 2015) 6 Bidding & Constructions Observation (March 2015) DESIGN COMPANY Duwamish Riverbend Hill Phase 2 Improvements Estimate of Probable Costs 50% DD SvR Design Company S4R #14010 Initial Work QUANTITY UNIT UNIT COST TOTAL COST I. Site Preparation and Earthwork. Mobilize, clear, grub, TESC, tree protection Earthwork on site Earthwork including haul MSE Wall II. Hardscape Crushed Rock Surfacing -10' drweable paths Crushed, Rock Surfacing - 6' pedestrian paths Steps III. Interpretive Elements Program Shelter Interpretive Floor Wood Shed 1 Potly Surround Plant and Season Sign Post. Wayrfinding Screen Research Markers Stump Benches Interpretive Benches Web site (cost under review) 1 allow $50,000 3,415 cy $20 1,862 cy 525 438 sff 556 Site Preparation Subtotal 12,172 sf 7,290 sf 0sf 52.00 $1.50 580.00 Site Preparation 8 Hardscape Subtotal 20% Contingency Total III. Planting Wetland (includes irrigation, ammendment, mulch, paths) Wet Meadow (includes irrigation, ammendment, mulch, paths) Prairie (includes mowed path areas and irrigation - later work convert seeded area) Savannah (includes mowed path areas and irrigation - later work convert seeded area) Forested and Shrub Buffer Area {includes irrigation, ammendment,. Grass Restoration (non- irrigated could be d4terent varieties) Trees for Forested Buffer (includes mulch, 5 gallon trees 20' o.c., ammendment, irrigation initial work- paths, shrubs and mulch later work) 0 ea 530..000 0 ea 510.000 0 ea 524,000 6 ea 51.000 0 ea 53,000 5 ea 5200 5 ea 5100 3 ea 56.000 0 ea 55,000 Interpretive Elements Subtotal 20% Contingency Total 5,074 sf 58.50 5,010 sf $5.50 9,686 sf 56.00 7,544 sf 0 sf 46:550 sf 35,300 of 56.50 57.50 51.00 52.50 Landscape Subtotal 20 °b Contingency Total $50,000 $68300 $46,550 524,528 5189,378 $24,344 510.935 50 535.279 Print Date: 09117/14 QUANTITY UNIT UNIT COST Later Work TOTAL COST 1 allow $20,000 0 cy $20 0 cy 525 0 sff 556 Site Preparation Subtotal 0 sf 0 of 334 sf $224,667 Site Preparation 544.931 5269.683 50 50 50 56,000 50 51.000 $500 518,000 50 525,600 $5,100 530,600 532,981 $27,555 $58,116 349,036 50 546,550 588,250 52.00 $1.50 $60.00 Hardscape Subtotal 20% Contingency Total 1 ea 530,000 1 ea 510.000 1 ea 524,000 0 ea 51.000 1 ea 53,000 5 ea 5200 5 ea. 5100 4 ea 56.000 1 ea $5,000 Interpretive Elements Subtotal 20% Contingency Total $20.000 50 $0 $0 $20,000 50 50 526,720 $26.720 546,726 $9.344 $56,054 530,000 510.000 524,000 50 53,000 51,000 5500 524.000 55,000 $97,508 $19,504 $117,000 0 sf $6.50 50 $302,488 $60,498 $362.986 CONSTRUCTION COST $663.174 0 sf 55.50 50 514,908 53.00 522,560 $7.50 51.00 $4.00 7,454 sf 52.00 7,520 sf 0sf 0 sf 35,300 sf Landscape Subtotal 20% Contingency Total 50 50 5141,200 5178,668 $36,734 5214,402 CONSTRUCTION COST 5387,466