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TABLE OF CONTENTS Fish Passage Fluvial Geomorphology GIS and Mapping Capabilities Instream Flow Analysis Permitting and Planning Plant Ecology and Wetland Science Stormwater Management Stream Restoration Planning and Design
Hansen Creek Concept Design Red River Meadows Stream Restoration Project Lower Ohop Creek Stream Restoration Planning Riverbank Stabilization Indian Creek Restoration, Olympia, Washington Sediment Trapping, Flood Control & Restoration of a Dredged Channel: Hansen Creek Technical Facilitation, Public Scoping and Public Participation Water Quality Assessments Water Resource Assessments Water Rights and Water Use Water Supply Watershed Analysis | ||||||||||||||||||||||||||||||||||||
PROJECT DESCRIPTIONS | ||||||||||||||||||||||||||||||||||||
Stream Restoration Planning and DesignBenewah Creek RestorationClient: Coeur d’Alene Indian Tribe Project Description:Steve Bauer managed a WPN team that performed topographic survey, full engineering design and construction management for ½-mile of creek restoration. Design included the recreation of sinuous channels, floodplains, wetlands and ponds. Creek design utilized minimal in-stream structures and bank protection measures and emphasized use of riffles for hydraulic control. Benewah Creek is a tributary to Lake Coeur d’Alene, near Saint Maries, Idaho. A “total station” was used for the survey and spreadsheets and the HEC-RAS model were used in the creek design.
Hansen Creek Concept DesignClient: Skagit County, Washington Project Description: Susan Perkins and other WPN members performed the alternative analysis and concept design for over 5-miles of this salmon and steelhead stream. In addition to expanding and enhancing the in-stream and riparian habitat with major channel improvements, this project aimed at restoring a large historic alluvial fan to eliminate the downstream sediment deposition and subsequent flooding. The full range of typical design alternatives were presented including the introduction of large woody debris, coordination with an adjacent park design, and possible bridge retrofits. Susan developed a sediment budget to calculate the amount of sediment expected within the project area. A HEC-RAS model was used to analyze the existing condition and proposed alternatives. Hansen Creek is a tributary to the Skagit River, near Sedro-Woolley, Washington. Red River Meadows Stream Restoration ProjectClient: Idaho County Soil and Water Conservation District Project Description: Steve Bauer was initially involved in coordinating development of a stream restoration plan to restore spawning and rearing habitat to a section of Red River, headwaters to the SF Clearwater River. On a watershed scale, logging, road building, and gold mining activities altered the hydrology, sediment delivery, and water quality of the Red River. On a local scale, the river channel was straightened and riparian vegetation eliminated due to dredge mining and pasture improvement. The Red River project was undertaken to restore the meadow ecosystem to help restore the chinook salmon, resident fish, and wildlife. Steve designed an implementation and effectiveness monitoring program including construction-related turbidity, revegetation success, stream channel response, summer water temperature regime, groundwater levels, wildlife habitat area, riparian composition, substrate conditions, and fish microhabitat features Lower Ohop Creek Stream Restoration PlanningClient: Nisqually Indian Tribe, Washington Project Description: Ohop Creek is a small (44 mi2) tributary of the Nisqually River in Pierce County, Washington, comprised primarily of commercial forest, small farms, and rural residential lands. The lower 9 miles of the Ohop Creek valley was formerly extensively used for dairy farming, and most of the Creek in this reach had been ditched in the 1930’s. Ohop Creek and it’s tributaries are used by most species of anadromous fish in the Nisqually Basin, including Fall Chinook and coho salmon, and steelhead. The Nisqually Indian Tribe, as co-managers of the fisheries resources in the basin along with State of Washington, was interested in developing a restoration plan for lower Ohop Creek. In 2000 the Nisqually Tribe contracted with WPN member Ed Salminen to develop a restoration plan for this reach. WPN member Nancy Napp is currently working with Ed performing an alternative analysis and conceptual design for over 7-miles of this salmon stream. The alternatives range from full, valley-wide channel relocation and floodplain restoration to simple in-stream spawning and rearing habitat improvements. This project also includes alternatives for the enhancement of the adjacent wetlands and off-channel spawning areas. Simplistic HEC-RAS models were developed to model the possible alternatives. The following are select graphics from the Ohop Creek Enhancement Plan report.
Riverbank StabilizationClient: City of Lynwood, Washington Project Description: Bob Denman conducted drainage basin analysis for the City of Lynnwood and Snohomish County, Washington. Analysis included inventory of basin biological, water quality, and stream channel characteristics. A number of problems including bank erosion, flooding, and habitat degradation were identified, and a range of possible solutions were developed. Solutions included both non-structural components such as policy reform and structural components such as culvert replacement and riparian planting. Indian Creek Restoration, Olympia, WashingtonClient: City of Olympia, Washington Project Description: Joanne Richter managed this stream restoration project for the city of Olympia, Washington. The project was initiated when the highly urbanized Indian Creek overflowed it’s banks and flooded a local auto dealership in 1990. Through a collaborative effort involving the Washington State Department of Transportation, The Washington Department of Fisheries, The Evergreen State College, and the owners of the auto dealership, the City designed and constructed a new 900-foot channel for the creek. The new channel was designed to eliminate potential flooding in the area, restore fish passage to the upper reaches of the creek (which had been previously blocked), provide riparian habitat, and create a unique educational opportunity at a major entry-way to downtown Olympia. Sediment Trapping, Flood Control and Restoration of a Dredged Channel: Hansen CreekClient: With Miller Consulting for Skagit County, Washington Project Description: Sue Perkins, Karen Welch, with other WPN members, conducted technical hydrologic, hydraulic, and sediment budget analyses for the Hansen Creek Watershed Management Plan. As part of the effort, hydrologic and hydraulic models were developed to assess flood impacts of possible stream configurations such as excavated floodplain benches, setback levees, and restoring meander bends and LWD to channelized stream reaches. The magnitude and frequency of anticipated sediment deposition was determined using dredging records, profile surveys, and landslide inventories. The feasibility of depositing sediment using alluvial fans, grade control structures, or sediment ponds were analyzed as alternatives to dredging. |
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