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Rodriguez Fish Passage Project

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.


The designs for fish passage improvements and pipeline protection were finalized in 2012 and consisted of the installation of a roughened channel.  The channel was reconstructed for approximately 250 feet using imported rock to provide a smooth transition in the stream profile and hydraulic conditions conducive to fish passage.  The design incorporated two pools and a woody debris structure to provide resting and rearing habitat.  Additionally, boulder weirs were installed to maintain pool scour and grade control through the project area.

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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
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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
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Northern Cal-Nevada Project Portfolio
Big Meadow Creek Watershed Assessment
Blackwood Creek Stream Restoration
Cold Creek/ High Meadow Ecosystem Restoration
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Edgewood Creek Watershed Assessment, Enhancement Plan, & Restoration
Hat Creek Restoration
Hope Valley Meadow Restoration
Independence Lake Log Cribwall and Fish Barrier Design
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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
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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
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Murtaugh Creek Fish Passage
North Fork Deep Creek Habitat Enhancement Project
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Salmon and Cox Creek Fish Barrier Improvement Project
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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