Santa Cruz, CA
831.421.9291
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  Portland, OR
503.227.5979
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Southern California Project Portfolio

 

Explore some of our Southern California projects using the cluster map or by viewing the items below.

ag-flood

Client: Coastal San Luis RCD, County of San Luis Obispo

In 1959 the lower three miles of the mainstem Arroyo Grande Creek were converted to a trapezoidal flood control channel to reduce flood risk to high value farm land. Sedimentation, vigorous riparian growth and changes in the watershed due to urbanization have altered the flood control channel to the point where it provides very little in the way of flood protection. In addition, environmental regulations that protect sensitive species have limited the ability of the County to perform channel maintenance work. In 2001 a high intensity storm event caused levee failure, resulting in millions of dollars in damage to adjacent farmland and residential properties. In response, the Coastal San Luis Resource Conservation District commissioned Waterways staff, in conjunction with SH+G, to evaluate potential alternatives to improve flood protection along this reach of Arroyo Grande Creek. Identified alternatives included levee raising, environmentally appropriate vegetation and sediment management, and erosion control and flood detention projects in the upper watershed to reduce sedimentation in the flood control reach.

widdoes1 webClient: South Coast Habitat Restoration

Waterways was contracted by South Coast Habitat Restoration to provide design services for the improvement of fish passage conditions at Widdoes Crossing, a private road crossing on Gobernador Creek.  Fish passage conditions at the site were severely impacted by incision of the streambed below a concrete and boulder ford which created an 8 foot hydraulic drop.  

DSC01634 webClient: Coastal San Luis Resource Conservation District

The primary objective of this project was to develop a planning document to restore and enhance aquatic habitat conditions for steelhead trout in the Morro Bay watershed. Specific tasks included oversight and review of field data collection by Resource Conservation District programs, organization and review of existing and historical data, field reconnaissance of potential limiting factors, interaction with agency staff and members of the public, and development of the Restoration Planning document. Recommendations and restoration priorities were developed based on the results of the limiting factors analysis and input from agencies and the public. This project was funded by the Morro Bay National Estuary Program, California Department of Fish and Game, and the California Coastal Conservancy.

IMG 2471webClient: Coastal San Luis Resource Conservation District

NOAA Fisheries Recovery Plan for steelhead populations lists Pismo Creek as a high priority system for the recovery of the South Central California Coast Steelhead ESU.  Limiting factors to their continued survival in the Pismo Creek Watershed are water withdrawals and fish passage barriers.  One of the most significant fish passage barriers in the lower portion of the system is a Union Pacific Railroad Crossing that blocks all life stages of steelhead under all flow conditions.  Incision downstream of the concrete culvert railroad crossing has resulted in a 12 foot drop over the concrete structure along with a broad concrete apron through the culvert itself that creates shallow flow under most discharges.  A series of Denil fish ladders was installed at the site in the 1980's but has proven to be ineffective at providing fish passage and requires constant maintenance from debris and bedload. 

RodriguezClient: County of San Luis Obispo

Waterways was contracted by the County of San Luis Obispo Public Works Department (Utilities Division) to provide assessment, design and construction observation services for the improvement of fish passage conditions and the protection of a waterline in Arroyo Grande Creek at the Rodriguez Bridge crossing.  Our work also included preparation of design report and response to comments from NMFS fish passage engineers.
Just upstream of Rodriguez Bridge there was an exposed concrete encased water supply line within the bed of Arroyo Grande.  Channel scour on the downstream side of the encasement had nearly undermined the encasement, potentially leading to structural failure of the pipeline, and leaving a 3 foot hydraulic drop that created a partial barrier to fish passage.

P7080089 webClient: Coastal San Luis Resource Conservation District

Channel and riparian conditions along Tally Ho Creek within the project area look much different today than they did several hundred years ago. Pressure to utilize flat valley bottoms for agriculture and, later, suburban development, resulted in removal of much of the riparian vegetation, filling of wetlands, road building, and straightening and deepening of Tally Ho Creek. Cleared portions of the valley bottom now consist of single family homes and Tally Ho Road, and Tally Ho Creek has been confined to the eastern edge of the valley floor.

Project Menu

Central California Project Portfolio
Aptos Creek Watershed Assessment and Enhancement Plan
Attiyeh Ranch Conservation Easement
Camp Pico Blanco Fish Ladder and Dam Retrofit
City of Santa Cruz Watershed Management Plan
Corralitos Creek Bank Stabilization
Eureka Canyon Bridge Replacement and Fish Passage Improvements @ Koinonia Conference Center
Fall Creek Fish Ladder
Geyer Quarry Restoration Plan
Mitchell Creek Dam Removals & Fish Passage Improvements
North Monterey County High School Nature Area Design Project
Pajaro River Care Project
Potrero Hills Wetland Mitigation
Quail Hollow Bridge Replacement and Channel Restoration
Salmonid Enhancment Plan for the San Lorenzo River
San Lorenzo River Monitoring
Soquel Creek Floodplain Restoration
Sycamore Creek Bank Stabilization
Valencia Creek Fish Ladder
Watsonville Sloughs Landfill Site Restoration near Ramsay Park
Watsonville Sloughs Manabe Property Wetland Restoration
Watsonville Trails Master Plan
West Valley College Stream and Wetland Enhancement and Riparian Trail Plan
Zayante Area Sediment Source Reduction Plan
Northern Cal-Nevada Project Portfolio
Big Meadow Creek Watershed Assessment
Blackwood Creek Stream Restoration
Cold Creek/ High Meadow Ecosystem Restoration
Coldstream Floodplain Enhancement Project
Edgewood Creek Watershed Assessment, Enhancement Plan, & Restoration
Hat Creek Restoration
Hope Valley Meadow Restoration
Independence Lake Log Cribwall and Fish Barrier Design
Kunzler Ranch Gravel Extraction
Perazzo Meadows Geomorphic Assessment
Russian River Projects
Sonoma County Fish Passage Projects
St. Helena Comprehensive Flood Protection Plan
Trout Creek Restoration
Upper Carson River Watershed Assessment
Pacific Northwest Project Portfolio
Batwater Station Floodplain Enhancement Project
Clackamas County Water Environment Services Action Planning & Geomorphic Monitoring
Dairy Creek- Sturgeon Lake Restoration
East Valley Mine Wetland Mitigation Project
Fox Creek Restoration Plan
Gales Creek Restoration Planning
Gooseneck Creek Restoration
Half Mile Lane Mitigation Bank
Hillsboro Landfill Wetlands Outfall Channel and No-Rise Documentation
Jackson Creek Restoration Plan
Lower Clatskanie Floodplain Restoration
Lower Cottonwood Creek Points of Diversion Modification Projects
Mill Creek Side Channel Restoration
Milton Creek Large Wood Enhancement Project
Murtaugh Creek Fish Passage
North Fork Deep Creek Habitat Enhancement Project
Rinearson Creek Natural Area Restoration
Salmon and Cox Creek Fish Barrier Improvement Project
Scappoose Bay Restoration Plan
South Fork Necanicum Fish Passage Improvement Project
Southern California Project Portfolio
Arroyo Grande Creek Channel Flood Mitigation
Circle G Ranch Fish Passage Improvement
Gobernador Creek Bridge Replacement and Fish Passage Improvements - Widdoes Residence
Morro Fish Review
Pismo Creek Fish Passage Project
Rodriguez Fish Passage Project
Tally Ho Channel Assessment