Designer: Paul Broadhurst
Contractor: Bill Rissel Stillwater Marine Construction
The owners had the bulkhead removed, along with a shoreline gazebo and lawn and ornamental shrubs that extended from the house to the bulkhead.
They then re-sloped and revegetated the riparian area with native plantings and recontoured the shore with a mix of cobble/gravel, adding a top layer of spawning gravel to enhance shallow water habitat for salmon.
Boulders and large woody debris were also added to the gravel beach. Learn more about the project.
Shoreline Processes Credits
The house and accessory buildings met the setback from OHWM required by City of Kirkland. While the entire 150-ft concrete bulkhead was removed, about 85 feet were replaced with a partial revetment of boulders, which meant a net bulkhead removal of less than 50%.
Shoreline Habitat Credits
The project maintained and planted native vegetation in over 70% of the riparian buffer and implemented a monitoring and maintenance plan for riparian plantings. About 10-20% of the shoreline was planted with emergent and overhanging vegetation. At least 6 large trees (>4 inches in diameter at breast height) were planted in the riparian buffer.
Woody material was added to some 20-30% of the shoreline to attenuate wave energy and add habitat complexity. Regarding overwater structures, points were awarded for having relatively narrow ramps and docks, grating that allowed light penetration on over 50% of these structures, and no lighting. The new shoreline access path was designed to minimize impact on the riparian buffer.
Water Quality Credits
Because data for the whole site (i.e., beyond the shore side of the property) were not available, it was not possible to calculate total lot coverage and impervious surface areas – hence, no points were available for these credits.
However, points were awarded for using untreated building materials and no points or stains on the overwater structures. Also, the landscaping was installed, monitored and managed for at least 3 years without the use of synthetic pesticides, herbicides and fertilizers.
The owners kindly made their property available to the GSH program for both pilot testing and verifier training.