Fish Passage Barrier Assessment in Sonoma Creek Watershed. Final Report

Chris Katopothis; Lisa Micheli; Michelle Orme; Cynthia Rossi; Ryan Branciforte
Publication Date: 
Sonoma Ecology Center
Publication Place: 
Sonoma CA

Sonoma Ecology Center (SECSonoma Ecology Center is a not-for-profit organization located in the Sonoma Valley. conducted the Sonoma Creek Watershed Fish Passage Barrier Assessment between June 2003 and December 2004. Funding was provided by the California Department of Fish and Game (CDFGCalifornia Department of Fish and Game) Agreement # P0210556, and the Bella Vista Foundation. The goals of this project were to compile a complete inventory of road and stream crossings that are potentially functioning as barriers to fish movement, to evaluate whether potential barriers pose a full or partial obstacle to fish passage, and to estimate the loss of habitat due to these barriers. This information is vital to begin the process of ranking these sites for remediation.

Based on habitat survey results identifying several known barriers on a handful of tributaries, we hypothesized that fish passage barriers may cut off a significant portion of potential spawning and rearing habitat. The focus of this study consisted of evaluating every known stream road-crossing using CDFGCalifornia Department of Fish and Game protocols to determine whether or not culverts and other structures posed either a full or partial barrier to fish movement.

This report contains information on the methods used in this study to assess potential fish passage barriers in the Sonoma Creek watershed, an inventory of site locations and characteristics, and data analysis results. The analysis results contained in this report include an initial ranking of sites determined to be functioning as full fish passage barriers, as well as an estimation of habitat loss due to these barriers.

Flow diversions; Culverts; Road crossings; Habitat loss; Fish habitat
Date Period: 
06/01/2003 - 12/31/2004
Lisa Micheli
Sonoma Ecology Center
P.O. Box 1486, Eldridge, CA 95431
PreLFA_Barriers_report_final.pdf995.57 KB

Fish Passage Barrier Assessment in Sonoma Creek Watershed. Final Report data, by Station

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