DESCRIPTION
The restoration site is a roughly 'V” shaped 6.2-acre parcel of land in the vicinity of Turning Basin No. 3 of the Duwamish Waterway. It is within the 21.5-acre Duwamish Substation property owned by Seattle City Light. Historically, Hamm Creek meandered through an intertidal marsh at the site and flowed into the Duwamish River. From the early 1950’s through 1971 the site was used as a dredged material stockpiling area. Consequently, Hamm Creek was 'placed” in a ditch and routed into a culvert with an outfall into the Duwamish River accessible to fish only at higher tides. Summary taken from NOAA Northwest Region DARRP site (http://www.darrp.noaa.gov/northwest/elliott/scln.html).
Together with the U.S. Army Corps of Engineers under Section 1135 funding, King County created 2,300 feet of new productive riparian stream bed and channel for Hamm Creek along the northern and western portions of the site. The Elliott Bay/Duwamish Restoration Program purchased a conservation easement to cover all restoration construction activities and has been responsible for the design and monitoring of a one- acre estuarine marsh with fish-passable connection to the Duwamish Waterway. The enhanced freshwater Hamm Creek channel features meanders, fish pools, and large woody debris. Native trees and shrubs forming a riparian buffer are to be planted on the upper slopes of the bank. The intertidal habitat was planted with native estuarine marsh vegetation in spring 2000.
Monitoring for intertidal habitat success is being conducted under the Elliott Bay/Duwamish Restoration Program's restoration monitoring plan, with the last monitoring scheduled for 2015. Stream monitoring will be conducted by other agencies.
Description taken from NOAA Northwest Region DARRP website (http://www.darrp.noaa.gov/northwest/elliott/scln.html).
NOTES
Goals: NOAA's records indicate that 6.2 acres of habitat were created, but on the ground GIS data collected by People For Puget Sound in 2008 shows 4.07 acres.
Funding: The Elliott Bay/Duwamish River Restoration Panel contributed to this project, but did not fully fund it.
Conservation Easement Purchase: $770,000 (if any property was actually purchased, it was done with non-Panel funds).
Construction Contingency: $49,971.15 (this was apparently the amount needed in addition to whatever the original construction contract called for to deal with unexpected issues; Panel did not pay for actual construction beyond this contingency amount)
