Client: U.S. Army Corps of Engineers via HDR, Inc.
Dairy Creek is located approximately 12 miles northwest of Portland, Oregon on Sauvie Island. Dairy Creek is a highly modified channel connecting the Columbia River at river mile (RM) 98.5 to Sturgeon Lake. The U.S. Army Corps of Engineers (USACE), along with local partners, West Multnomah Soil & Water Conservation District (WMSWCD) and the Oregon Department of Fish and Wildlife (ODFW) are interested in evaluating restoration opportunities for Dairy Creek (Sauvie Island) via the Section 1135 of the 2000 Water Resources Development Act. The original intent of the Dairy Creek Restoration Feasibility Study (Study) was to evaluate alternatives to re-establish Dairy Creek as a flushing channel for Sturgeon Lake.
Client: Clean Water Services (CWS), Oregon Department of State Lands (DSL)
Waterways assisted CWS and DSL in the planning and design of a 20 acre mitigation bank in the Tualatin River Watershed to provide wetland, temperature, and salmon credits. In addition to providing purchasable credits, the project simultaneously tested a function-based accounting system developed by the Willamette Partnership’s Counting on the Environment program (http://www.willamettepartnership.org). This program was developed with the help of public, private, and non-profit stakeholders to develop a shared accounting system for quantifying impacts and benefits to ecosystem services for application to ecosystem markets. The Partnership completed a test version for water temperature, wetlands, salmonid habitat, and upland prairie that was applied to pilot projects in the program. Half Mile Lane was one of the pilot projects that tested three of these services, and was the only pilot site thus far that resulted in real-world transactions. Therefore, this project tested not only the ecosystem credit calculator, but also the sequence of developing, selling and buying ecosystem credits.
Client: City of San Jose
Waterways staff was retained to assess existing conditions and provide recommendations for enhancement of riparian and aquatic habitat along 2.5 miles of stream channel within Alum Rock Park, in the City of San Jose. The assessment identified Quail Hollow as a high priority project site based on fish passage impediments, stream channel erosion, and recreational access concerns.
North Fork John Day Watershed Council
Fox Creek has been identified as an important spawning and rearing tributary to the North Fork of the John Day River in Eastern Oregon. Impacts to the stream and watershed include fish passage barriers associated with passive diversion structures, water withdrawals during the critical low flow summer season, lack of adequate fish screening at water diversion sites, and severe channel incision that was causing reductions in water quality associated with bank erosion and loss of a continuous riparian canopy, loss of functional floodplain habitat, and conversion of productive hay fields to marginal rangeland as water tables declined. These changes were having a noticeable impact on the economic viability of the land and the sustainability of natural ecological processes.
Client: Boy Scouts of America, Monterey Bay Area Council
The Boy Scouts of America own and operate an 800-acre property on the Little Sur River that is used as a summer camp. A flashboard dam was installed in the 1950s to create an impoundment for recreational and educational uses. The seasonal operation of this dam impeded juvenile and adult steelhead passage at the site
Client: Resource Conservation District of Santa Cruz County
Waterways provided geomorphic assessment, land surveying, and engineering design services for ecological enhancements to a degraded reach of Sycamore Creek, at the confluence with Uvas Creek. The design included recontouring channel banks and the creation of inset floodplain benches to reduce erosion. Native vegetation was established on graded areas. Hydraulic control structures installed at the project included periodic boulder weirs and stilling pools for energy dissipation and a sheetpile cutoff at the project terminus. The detailed grading plan allowed for the retention of mature riparian trees within the project footprint.
Client: Sonoma County Public Works
Waterways assisted the Sonoma County Department of Transportation and Public Works with planning and design services to address two fish passage barriers associated with stream crossings on County roads. The sites consisted of two large concrete box culverts that were limiting fish passage to high quality spawning and rearing habitat located upstream. At each of these culverts, the natural streambed had incised to at least 4 feet below the culvert outlet, resulting in a partial barrier to migrating salmonids. The design solution included structural retrofit of the culverts using concrete baffles, and the construction of a roughened channel to aggrade the stream profile sufficiently to eliminate the passage barrier. Work consisted of topographic mapping, hydrologic and hydraulic modeling, and preparation of preliminary and final design drawings and specifications.
Client: Clackamas County, Water Environment Services
Since 2009, Waterways staff has worked with Clackamas County’s Water Environment Services (WES) on Action Planning and Geomorphic Monitoring efforts in the more urbanized portions of Clackamas County. In 2008 and 2009, Waterways was an integral member of a team of consultants that prepared Watershed Action Plans (WAP) for the Kellogg/Mt. Scott and Rock Creek watersheds. Waterways prepared the hydrologic and geomorphic sections of the Action Plan for each basin and assisted in the development of a subwatershed-scale risk assessment, identification of project priorities, and a tool-based identification of levels of service.
Client: City of Santa Cruz- Public Works Department
Waterways performs annual cross section surveys at seventeen permanent monitoring sections established along the San Lorenzo River, from Highway 1 to the river mouth. This project assists the City of Santa Cruz in meeting flood protection requirements and habitat restoration goals by quantifying changes in channel elevation, form, and vegetation cover. The monitoring data is presented in an annual report discussing the geomorphic and hydrologic trends, and providing adaptive management recommendations to the City’s riparian vegetation and sediment management operations.
Client: Truckee River Watershed Council & California State Parks
A 2007 geomorphic assessment of the Coldstream Canyon watershed identified opportunities to restore stream and watershed function along the lower one-half mile of Cold Creek, extending upstream from the confluence with Donner Creek. Waterways, in coordination with River Run Consulting, prepared final designs for the restoration of this reach. Designs included inset floodplain bench excavation, re-contouring of steep banks and log/boulder barb installations to reduce bank erosion and expand and improve riparian habitat. Waterways and River Run also provided permit support and construction oversight.
Client: American Rivers, Inc. & Placer County Resource Conservation District
Waterways was selected to develop and analyze alternatives for ecological restoration of the Hope Valley Meadow on the West Fork Carson River, with a primary goal of enhancing the full range of ecosystem services this highly visible and well-known meadow provides.
Client: The Nature Conservancy
Independence Lake holds one of only two known wild, self-sustaining populations of Lahontan cutthroat trout in the world - a species that has been lost from 99% of its historic range. Waterways staff are proud to have assisted The Nature Conservancy in their efforts to protect and restore this critical habitat through the planning and design of a barrier to exclude non-native fish from the lake.
Client: Scappoose Bay Watershed Council
Waterways was retained by the Scappoose Bay Watershed Council to develop bid-ready engineering drawings for six culverts on Salmon and Cox Creeks in the Scappoose Bay Watershed that were identified as high priority fish passage barriers during an assessment conducted in 2001. The design approach consisted of replacing each culvert with a bottomless arch culvert using streambed simulation criteria established by NOAA Fisheries and Oregon Department of Fish and Wildlife.
Client:City of Watsonville
The CARE project includes an ADA compliant pedestrian and bicycle trail providing community access to through a riparian corridor along the Pajaro River, near its outlet to the Pacific. The trail was designed with a surface that could be easily maintained following periodic inundation and fine sediment deposition within the floodplain through which it traverses. The trail provides an outlet to a scenic overlook on the Pajaro River, as well as to a boat launching ramp.
Client: Santa Cruz County Community Action Board
Waterways staff was retained to develop a fish passage improvement design for a concrete culvert that was hindering fish passage on Valencia Creek, in Santa Cruz County. Plans were developed to construct a concrete fish ladder structure, per design criteria established by the National Marine Fisheries Service (NMFS) and the California Department of Fish and Game (CDFG).
Client: Sierra Nevada Alliance
The Upper Carson River has been identified as a Category I priority watershed for water quality improvement by the California Unified Watershed Assessment. In response, the Sierra Nevada Alliance, on behalf of the Alpine Watershed Group, initiated preparation of a Stream Corridor Condition Assessment for the Upper Carson River Watershed with funding from the California State Water Resources Control Board. The assessment included a fluvial geomorphic assessment, a survey of conditions in the riparian and floodplain zone, a list of prioritized restoration projects, and a recommended list of management measures. Waterways staff acted as the project team hydrologists and geomorphologists and were the primary project team member in evaluating riparian health and providing restoration project recommendations. The assessment included approximately 66 miles of stream channel within the West Fork Carson River, East Fork Carson River, Wolf Creek, and Markleeville/Hot Springs Creek.
Client: USFS- Lake Tahoe Basin Management Unit
Waterways, in coordination with the USFS Lake Tahoe Basin Management Unit (LTBMU) and Swanson Hydrology, has developed designs to restore the mainstem and tributaries of Cold Creek in the High Meadow Complex (HMC) near South Lake Tahoe, California. The basic restoration objective is to increase soil moisture within approximately 70 acres of meadow area by modifying the morphology and hydrology of the streams in a manner consistent with natural geomorphic processes. Work involves re-constructing approximately 8,700 linear feet of channel and raising the elevation of the streambeds by 2 to 4 feet. The project will significantly increase the diversity and density of meadow wetland vegetation species and shift some areas from seasonally dry and sparse mesic meadows to wet meadow conditions.
The project’s three-year construction plan was completed in 2012, with Waterways providing on-site construction observation.
Client: Resource Conservation District of Santa Cruz County
Waterways was retained by the Resource Conservation District of Santa Cruz County (RCD) to prepare a sediment source analysis and action plan for the recently acquired Geyer Quarry property. The Land Trust of Santa Cruz County purchased the property in 2008 to provide protection to a portion of the unique and delicate Sandhill ecosystem that extends from Bonny Doon through the Scotts Valley area of the Santa Cruz Mountains. Mining activity, road construction, logging, and off‐highway vehicle (OHV) use have exposed steep, denuded hillslopes in many locations throughout the parcel. These sources of erosion have caused excessive sediment delivery to the San Lorenzo River and its key tributaries (in this case Bean Creek and Zayante Creek) resulting in impacts to salmonid habitat.
Client: Vail Resorts
Waterways staff was retained to prepare the Edgewood Watershed Assessment and Enhancement Plan (EWAEP) for the portion of the Edgewood Creek watershed managed by Heavenly Mountain Resort, located in the Lake Tahoe Basin, as part of the resorts 2005 Master Plan. The purpose of the EWAEP was to identify potential restoration projects in the Edgewood Creek watershed to improve Stream Environment Zone health and improve water quality. The final EWAEP was submitted in January 2006 and was followed by four restoration designs completed in 2006.
Client: California State Parks- Diablo Vista District
The Mitchell Creek Riparian Restoration and Fish Passage Improvement Project provides for removal of four small dams and the decommissioning of defunct access roads along a reach of Mitchell Creek, within Mount Diablo State Park. The design includes approximately 400 feet of constructed roughened channel to provide fish passage through the grade transition created by the various impoundments. In addition to the fish passage improvements, the project removed aproximately 2,500 cubic yards of impounded sediments from upstream of the site to restore floodplain function and reduce local bank erosion. The design included the installation of large wood elements obtained on site to provide bank stability and enhanced pool development. Waterways provided construction oversight for the project.
Client: County of Santa Cruz Department of Environmental Health
The objectives of this project were to develop a comprehensive plan that identified, through focused research and analysis of existing data, the limiting factors affecting habitat and populations conditions on the San Lorenzo River for steelhead trout and coho salmon. The San Lorenzo River is noted as having the largest run of steelhead south of San Francisco Bay and historically supported populations of coho.
Client: City of St. Helena
Waterways staff worked with the City of St. Helena and a team of consultants to design, permit, and construct a multi-objective flood control project that provides 100-year flood protection for residential properties along the Napa River, restores important floodplain and aquatic habitat, and improves public access. Specific elements of the project include a geomorphically-based floodplain terrace, shoreline restoration involving removal of an existing gabion and rip-rap bank protection structures and replacement with a natural point bar shoreline configuration, bioengineered bank stabilization structures, FEMA certified levee setbacks and floodwall construction, relocation of homes from the floodplain, and approximately 2,500 ft of pedestrian trails with interpretive signage.
Client: US Forest Service
Waterways staff led an interdisciplinary team to assess existing conditions within the Blackwood Creek Watershed, and then prepare detailed engineering plans and specifications for recommended projects. Blackwood Creek is a major tributary to Lake Tahoe, drains a mix of steep volcanic and granitic terrain, has a high bedload transport rate, and was historically impacted by grazing, logging, and instream gravel mining. Key impacts identified during the study were excessive bank erosion and channel widening associated with channel incision and loss of floodplain connectivity and the presence of several fish passage barriers. To restore the physical processes that sustain channel morphology and biological function, an aggressive, long-term restoration strategy was proposed. To date, four distinct restoration projects have been designed and implemented:
Client: Granite Construction Company
Waterways staff assisted Granite Construction Company with planning, design, and permitting of a proposed off-channel gravel extraction project on the Kunzler Ranch property, located at the confluence of Ackerman Creek and the Russian River, in the Ukiah Valley of Mendocino County. Waterways has conducted hydrologic, hydraulic, and geomorphic analyses to assess flooding impacts, habitat development potential, and channel stability at the proposed project site, under both project-life and reclamation phases.
Client: Tualatin River Watershed Council
Waterways staff prepared engineering designs and specifications to improve passage for steelhead and cutthroat trout on a headwater tributary to the Tualatin River in Washington County, OR. The site consisted of a seasonal flashboard dam. Downstream of the flashboard dam the channel had incised 3-feet creating a fish passage barrier under most flow conditions. The design consists of a series of five rock weirs to build the bed up downstream of the structure and provide fish passage under all flow conditions by creating a backwater condition at the dam. Waterways assisted the TRWC with the permitting and construction supervision. The project was constructed in Summer 2008.
Client: Tualatin River Watershed Council (TRWC)
In March of 2003 the TRWC completed work on the Lower Gales Creek Habitat Enhancement Plan. Gales Creek is a major tributary to the Tualatin River in Washington County, Oregon. The Enhancement Plan identified potential restoration projects designed to improve habitat conditions for steelhead and other salmonids. To evaluate the feasibility of implementing potential channel, floodplain, and habitat enhancement projects, TRWC retained the services of Waterways staff to conduct a comprehensive geomorphic assessment of the planning reach and prioritize potential restoration options. The geomorphic assessment and project feasibility study was completed in 2005. Following completion of the study, Waterways has continued to work with the TRWC by preparing construction documents for site specific projects aimed at enhancing channel and floodplain function, improving in-stream and off-channel aquatic and wetland habitat, and restoring riparian areas. Waterways and TRWC has worked closely with landowners and other stakeholders to achieve the identified goals.
Client: City of Watsonville
Waterways staff developed a restoration plan for an area in the Watsonville Slough near Ramsay Park. Initial assessment of the Project Area identified an old landfill adjacent to Ramsay Park as a high priority site to develop plans for restoration project implementation. The Ramsay Park site was part of a larger restoration planning process that identified and prioritized a range of sites in the area (including the landfill site) A complete restoration plan for the Ramsay Park was developed to a level for project implementation. This included a hydrologic and ecologic assessment, a biotic report, wetland delineation, engineering plans, and a design report. The design aimed to create a wetland setting with irregular shorelines, suitable vegetation and natural wetland features that would serve to restore and enhance wildlife habitat and wetland functions on site.
Client: Necanicum River Watershed Council
Waterways was hired to develop an engineered solution to address a high priority fish passage site on the South Fork Necanicum. The project site consists of a 6-foot high diversion dam and intake structure. The objectives of the project were to provide unimpeded passage for all species and life histories of salmonids present in the South Fork, meet NMFS and NOAA Fisheries fish screening guidelines, and provide a reliable source of water to the City of Seaside according to their existing water right. Specific project tasks include preparing a set of alternatives for review by a technical advisory team, preparation of preliminary engineering drawings for the selected alternative, preparation of a water management plan that identifies potential changes in the operation and management of the diversion as a result of the modifications, and preparation of the final engineering drawings.
Client: Scappoose Bay Watershed Council
In 2000, the Scappoose Bay Watershed Council (SBWC) completed a watershed assessment for the streams and catchments that enter Scappoose Bay. The watershed assessment identified several areas of concern affecting watershed and ecosystem health. Of particular concern was the potential impact that incision has on channel and floodplain interaction and the ability of the stream to support and maintain good aquatic habitat. A 5 mile stretch of South Scappoose Creek that flows through the City of Scappoose was determined to have high priority for further assessment. It was identified as a priority for further assessment due to local concerns about erosion and flooding and the opportunities to enhance conditions for salmon and other organisms.
Client: United States Forest Service
The Cookhouse Meadow Restoration Project replaced approximately 1600 linear of stream that had incised by 4-6 feet within a meadow setting. The new channel was anticipated to restore a more natural channel morphology and flooding and soil moisture regime throughout the meadow, which is in turn expected to lead to improvements in water quality, vegetation composition, and fish and wildlife habitat. The project used stacked sod, salvaged from distributed areas throughout the adjacent meadow, to construct stable banks that will allow for natural channel evolution and adjustment.