Client: Santa Cruz County Resource Conservation District
Waterways staff prepared engineering plans and specifications for stabilization of approximately 100 linear feet of stream bank on Corralitos Creek in Santa Cruz County, California. The bioengineered bank stabilization included fabric encapsulated soil lifts contained within a log revetment structure. Logs were selectively harvested by thinning redwoods from an adjacent grove, thus reducing the cost and environmental impact of the project. Our staff performed construction supervision to ensure successful implementation. Revegetation has been successful and the bank now provides quality habitat in addition to controlling bank erosion and sedimentation in the creek.
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.
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: Oregon Parks and Recreation
Waterways Consulting recently completed a restoration plan for Jackson and Netarts Creeks for Oregon Parks and Recreation District at Cape Lookout State Park. The focus of the effort was to evaluate the hydrology, geomorphology, and habitat conditions of Jackson Creek, the principle stream that flows through Cape Lookout. Approximately 60 years ago, a portion of Jackson Creek was diverted to Netarts Bay to increase freshwater flows into Netarts Bay with the hope of improving the commercial oyster beds. Impacts associated with the diversion and associated flow split were addressed in the restoration plan as well as opportunities for enhancement of the Jackson Creek mainstem downstream of the diversion site.
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: Vail Resorts
Heavenly Mountain Resort in the Lake Tahoe Basin is in the process of updated their Master Plan (MP 05). One component of the update includes identification of potential restoration projects in the Edgewood Creek watershed to improve Stream Environment Zone health and improve water quality.Waterways staff was retained to prepare the Edgewood Watershed Assessment and Enhancement Plan (EWAEP) for the portion of the watershed managed by Heavenly Mountain Resort and to design and implement priority restoration projects identified as part of the assessment. The final EWAEP was submitted in January 2006 and was followed by four restoration designs completed in 2006.
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 supervision.
Client: Yamhill Basin Council
Gooseneck Creek, tributary to Mill Creek and the South Yamhill River, is an important tributary for steelhead/coho salmon spawning and rearing. The project area is located above the confluence with Mill Creek in a portion of the channel that was historically impacted by aggregate mining. Waterways was contracted by the Greater Yamhill Basin Council to develop a restoration design for approximately 2,000 feet of Gooseneck Creek that was incised down to bedrock due to past mining activities and historic plugging of a secondary channel. Confinement of the channel, in-channel mining activities, and loss of secondary channels had all but eliminated the natural pool-riffle morphology with a consequent loss of aquatic and riparian habitat.
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 approximately 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.
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: 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: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: City of Watsonville
Waterways staff, with assistance from Biotic Resources Group, designed a wetland restoration project on the Manabe property in Watsonville. The project site included a 25-acre portion of Watsonville Slough, between Highway 1 and Kearney Road located downstream of a large wetland complex adjacent to Ramsey Park that was recently restored in 2005 by the City of Watsonville. The objectives of the project included:
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).
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: 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: 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: 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: 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: 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: Monument Soil and Water Conservation District
Cottonwood Creek is a major tributary to the North Fork John Day River and has been identified as critical habitat for Middle Columbia River steelhead. The lower four miles of the creek enters a broad valley, providing opportunities for agriculture that relies on the water of Cottonwood Creek for production. There are currently 12 diversion sites along lower Cottonwood Creek, referred to as points of diversion (POD’s). Many of these diversions result in fish passage barriers during the low flow season. The Monument Soil and Water Conservation district requested Waterways assistance in the assessment of channel stability and fish passage for all 12 PODs and designs for three of the known fish passage barriers.
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: Town of Truckee
The Town of Truckee has partnered with the Truckee River Watershed Council and Truckee Development Corporation in a multi-objective redevelopment project that seeks to revitalize the downtown and the adjacent rail yard, reduce flood risks for businesses and residents, and improve the natural environment. The focus of this project is restoration of Trout Creek and development of open space that connects residents and visitors of the Truckee area to important natural resources. Waterways is leading a team of consultants tasked with enhancing habitat values and functions of Trout Creek.
Client: Syar Industries, Inc.
GEOMORPHIC ANALYSIS OF THE MIDDLE REACH OF THE RUSSIAN RIVER
Waterways, in cooperation with Swanson Hydrology and Geomorphology, is in the process of completing a detailed hydraulic, geomorphic and sediment transport analyses for the Russian River’s Middle Reach, near Healdsburg. This work focuses on the effects of in-stream mining and other human activities on channel morphology and flood capacity. A chrono-sequence of topographic surfaces representing the channel and floodplain were analyzed to calculate volumetric changes in channel geometry over the past 20 years. Then, a hydraulic model was constructed along 5 miles of the Russian River to evaluate land use impacts on flood elevations.
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.
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: 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: 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: US Forest Service
Waterways staff led an interdisciplinary team to assess existing conditions within the Blackwood Creek Watershed. 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.
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.