HomeMy WebLinkAboutPark 2013-04-24 Item 4 - Presentation - Duwamish GardensCity of Tukwila
Jim Haggerton, Mayor
INFORMATIONAL MEMORANDUM
TO: Tukwila Parks Commission
FROM: Bob Giberson, Public Works Director
By: Ryan Larson, Senior Engineer
DATE: April 19, 2013
SUBJECT: Duwamish Gardens
Project No. 90630102, Contract No. 12 -007
Project Status
ISSUE
Update on project status and preferred site layout for the Duwamish Gardens project.
BACKGROUND
The City of Tukwila acquired the Duwamish Gardens site in December 2007 through a combination of
grant and City funding. The site is 2.16 acres with approximately 500' of river frontage and is located along
the north bank of the Duwamish River, just downstream of East Marginal Way S. The Duwamish Gardens
site was acquired for a fish habitat restoration project, but will also include park elements including; trails,
an overlook, a hand boat launch, and interpretive elements.
In February 2012, the City of Tukwila entered into a consultant agreement with J.A. Brennan Associates for
the design of Duwamish Gardens. An early task of this agreement was to review the site for evidence of
cultural and historic resources. The cultural review showed evidence of some pre- contact use of the site
primarily in the southeast portion. In addition, the consultant surveyed the site and performed a detailed
geotechnical investigation to determine locations of contaminated soils, ground water monitoring,
recommended maximum design slopes, and elevations of proposed mud flats and intertidal marsh. The
consultant then developed two conceptual designs for the site and held stakeholder meetings, which
included City staff, regulatory agencies, a neighboring property owner, the Muckleshoot Tribe, and
residents that had expressed interest in the project.
DISCUSSION
Duwamish Gardens' site configurations are fairly limited due to the constraints the include, the desire to not
disturb cultural resources and the need to maximize habitat features and protect the neighboring property.
The selected design configuration was chosen as it provides the most mudflat and marsh habitat, while still
providing desired park elements.
The design consultant, J.A. Brennan is now in the process of developing a 30% level design based on this
configuration and is preparing a SEPA and JARPA applications to begin the permitting phase of the
project. A final design of Duwamish Gardens is expected by February 2014.
Construction costs are estimated at $2.3 million. Staff is in the process of obtaining necessary construction
funding through grants and to date, have secured a total of $880,000 for construction funding.
RECOMMENDATION
Information only, no action required.
Attachments: Existing Site Map
Archeological Map
Proposed Site Plan with Sections
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