Sturgeon Lake is reconnected to the Columbia River!
After over a decade of partnership building, planning, fundraising, and engineering, and just over four months of construction, the Dairy Creek channel reopened to tidal flow between the Columbia River and Sturgeon Lake on Sauvie Island.
The construction crew from Elting Northwest, Inc, overseen by Columbia River Estuary Study Taskforce (CREST), has completed work on Dairy Creek, removing all debris and dirt that had been blocking the channel. On November 1, 2018, crews removed the temporary bypass bridge on Reeder Road, and the last of the soil and sandbags blocking the flow of water in the channel. The new bridge is fully operational and open to all vehicle, bicycle, and pedestrian traffic. Here’s an aerial view of the completed creek, captured by CREST.
This winter, crews will plant the creek banks with native trees and shrubs, to replace the thickets of non-native blackberry and false indigo bush that were removed at the beginning of construction. Crews will continue to monitor the lake for invasive species that might travel up the creek from the river.
In summer of 2017, Conservation District staff conducted a survey of the Sturgeon Lake shoreline looking for potential invasive plants. While little of significance was found, valuable baseline information was needed before the Sturgeon Lake Restoration Project could reestablish a tidal link between Sturgeon Lake and the Columbia River through Dairy Creek. Now that the creek is reopened, new weed seeds will be able to float into the lake, so it will be important to keep a vigilant eye out for new invaders to help keep the lake pristine and maximize its value to fish and wildlife.
West Multnomah Soil & Water Conservation District (WMSWCD) has been working on Sturgeon Lake restoration since the District was formed in 1944. By that time, the Bonneville and Grand Coulee Dams were constructed on the Columbia River, denying upriver access to migratory salmon. The U.S. Army Corps of Engineers (USACE) built an 18-mile levee in 1941 to prevent annual flooding of more than 11,000 acres of prime agricultural land on Sauvie Island. That project severely restricted natural flows to Sturgeon Lake leading to increased sedimentation and greatly reduced aquatic habitat function. While a federally-funded project re-opened the channel from the Columbia River via Dairy Creek in 1989, subsequent floods blocked the creek’s mouth and reversed efforts to restore flow.
In 1982, an Oregon State University study concluded that a connection between the Columbia River and Sturgeon Lake was necessary to reverse sedimentation. Dairy Creek at the south end of the lake was identified as the best option for that connection. In 1985, WMSWCD created a partnership with Oregon Department of Fish and Wildlife and the Oregon Department of Environmental Quality to explore ways to re-establish the Dairy Creek connection, and subsequently completed a creek channel redirection in 1989. However, the historic floods of 1996-97 sent sand and woody debris to the mouth of Dairy Creek, plugging the channel. Shortly thereafter, many Columbia River salmonid species were listed for federal Endangered Species Act protection.
In 2007, WMSWCD convened a work group to take another look at options to re-open Dairy Creek or find other alternatives. The USACE completed a feasibility study of the project area, which totals 10,580 acres and includes Sturgeon Lake and the surrounding land on Sauvie Island. WMSWCD signed on as the “local sponsor” of the project. The study recommended replacing the failing culverts over Dairy Creek at Reeder Road, removing the sand plug from the mouth of Dairy Creek, and re-configuring the Dairy Creek channel.
The total project cost is $6.5 million, of which WMSWCD is responsible for raising $1.5 million under a matching fund agreement. The Conservation District secured $1 million from the Bonneville Power Administration (BPA), $300,000 from Multnomah County to replace two plugged culverts, and $100,000 from Metro. In addition, the Oregon Wildlife Heritage Foundation designed and operated a fundraising campaign for the District and exceeded its own goal of raising $365,000 from its members and supporters. The District will now turn its attention to raising funds for maintenance and contingency costs.
Due to BPA funding a more significant portion of the project costs, management of the project has been transferred from the US Army Corps of Engineers to BPA. In turn, BPA partners with the West Multnomah Soil & Water Conservation District and CREST to oversee the final design and construction of the project.
Current project timeline:
October 2017 – invasive vegetation removal completed
July 2018 – by-pass road installed, culvert removal, bridge construction begins
August/September 2018 – bridge and channel work
October/November 2018 – project completed, final site cleanup, native riparian plantings
February 2019 – additional native riparian plants installed
See photos from the construction project: Sturgeon Lake Restoration Project – Construction Photos, July-August 2018
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Read more historical information about the project:
Significance of Sturgeon Lake
Sturgeon Lake (3,200 acres), owned and managed as wildlife refuge by Oregon Department of Fish and Wildlife (ODFW), borders and is connected to Multnomah Channel via the Gilbert River and is connected to Columbia River by Dairy Creek. It is one of the premier natural and biologically significant aquatic and wildlife habitats in the state. Sturgeon Lake is an important link in the Pacific Flyway for waterfowl and a wide variety of bird species, offering winter habitat to 200,000 geese alone. In addition, juvenile salmon will leave the main river and seek refuge from high flows within the lake and sloughs. They use this time to increase in size and heartiness which in turn increases their likelihood of survival when they reach the ocean. Sturgeon Lake is identified in the Oregon Conservation Strategy as a “conservation opportunity area” and restoring flushing flows to the lake for salmon habitat restoration is specifically named as a state strategy.
The lake is roughly the size of Manhattan and is the largest tidally-influenced freshwater lake in the United States. In addition to the benefits to wildlife, some 800,000 people recreate on Sauvie Island every year, spending time in the Wildlife Area, hunting, fishing, hiking, using the beaches and visiting farms to buy fresh produce.
Contact us for more information about this project: email@example.com. We look forward to answering your questions.