This project took place near the confluence of the Sandy and Columbia Rivers on USFS property that includes the Sandy River Delta/Thousand Acres Park. Since the 1930s multiple manmade structures have been constructed throughout the estuary and have changed the hydrologic connection of the site to the Columbia River. AC removed both a tide gate and water control structure to reconnect the Columbia River to the estuary wetland. The channel was graded and enhanced with the installation of large woody debris, cobble for riffles and bars, step pools, beaver structures, erosion control fabric and willow cuttings. To enhance the existing 100+ acre wetland, AC stripped the existing invasive reed canary grass and then excavated to lower grades, providing increased hydrology to the wetland. AC also created floodplain channels through the wetland and removed various water control structures providing additional fish access and improved salmon habitat. A total of 40,000 CY of wetland and 10,000 CY of channel were excavated and the spoils placed over the canary grass strippings. All of the exposed soil and stockpiles were seeded and the slopes were strawed. During construction, AC maintained and controlled public access on the trails through this popular park, maintaining a safe work environment.
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