10/12/2025
The Cottage Lake Creek Weir Removal and Stream Restoration Project involved the complete removal of an old concrete weir and the restoration of the creek to a more natural and functional state. The work began with clearing and grubbing of the site, followed by a full creek diversion to safely isolate the work area. Approximately 350 cubic yards of native material were excavated and exported to reshape the channel and reestablish a natural stream profile. Managing the large-diameter diversion pipe running through the middle of the site added an additional layer of difficulty, especially with unpredictable and uncontrolled flow fluctuations throughout construction.
To rebuild the stream-bed and enhance aquatic habitat, a total of 330 tons of imported stream-bed gravels and cobbles were placed throughout the newly shaped channel. The restoration also included the purchase and installation of twenty-nine pieces of large woody debris, each carefully positioned to promote habitat complexity and channel stability. These were secured with a total of fifty-three Manta Ray earth anchors, providing long-term strength and resilience under varying flow conditions. In addition to the in-stream work, East Slope Earthworks constructed a gravel walking path, built wood stairs providing access down to the creek, and installed one hundred twenty-five feet of split rail cedar fencing to improve the site’s functionality and appearance.
Despite the project’s technical challenges, the work was completed safely, efficiently, and to the owner’s satisfaction. The collaboration with the project owner was excellent, and East Slope Earthworks looks forward to future opportunities to work together on similar restoration efforts.