HomeMy WebLinkAboutMitigation NarrativeMARINE RESTORATION & CONSTRUCTION LLC
P.O. Box 884
Kirkland, WA 98083-0884
Phone: (425) 576-8661
Mitigation Narrative:
Project File Number: 16-00232
Project Name: Joos Family LLC Pier
Proposed Work: The applicant proposes to construct a 140 foot pier. The main
walkway will begin with a 3’-11” width for the first 30 feet. The
remainder of the walkway is to be 5’-11”. The pier will have a
5’-11” by 23’-1” ell and a 1’-11” by 23’-1” finger ell. The
proposed pier is to be constructed with galvanized steel piles,
galvanized steel caps, ACZA treated stringers, glulam sides, and
Thru-Flow plastic grating to allow for light penetration. The
proposed pier has two 10” diameter mooring piles. The
applicant proposes to install a freestanding boatlift and a
freestanding 8 foot by 10 foot grated platform lift.
As mitigation for this project, the applicant proposes to create a
more natural beach and to implement a planting plan. The
proposed shoreline work entails bank stabilization behind the
ordinary high water line, the removal of debris and a concrete
bulkhead and steps, the placement of 50 cubic yards of 2” minus
spawning gravel (1½” minus gravel may be used if 2” minus
gravel is unavailable), and installation of native plantings.
Proposed Construction Dates: To be determined upon the receipt of all permits from the City of
Renton, the Washington State Department of Ecology, the Army
Corps of Engineers, the Washington State Department of Fish
and Wildlife, and the Washington Department of Natural
Resources.
The mitigation is to completed concurrently with the
construction with the exception of when in-water work windows
are closed for the spawning gravel and during the best time for
plant survivability.
Hours and Days of Operation: Construction hours will be limited to the hours prescribed by the
City of Renton and other Jurisdictions.
Proposed Hauling/Transportation
Routes: Materials will be brought to the site by a barge and/or a landing
vessel on Lake Washington.
Site Safety and Environmental
Precautions: The sanitary sewer line in Lake Washington will be located by a
professional locater company prior to any construction.
During pile driving, a wood block will be used as a sound
attenuation device.
A silt curtain and a containment boom will be deployed prior to
any construction that may cause siltation and/or debris to enter
the lake. We do not anticipate any debris entering the lake.
Special Construction/Hauling Hours: No hauling is proposed for this project.
Preliminary Traffic Control Plan: The proposed project takes place entirely on the shoreline of
Lake Washington away from the road. No traffic hazards or
diversions are necessary for this project.