An Assessment of Step-pool Urban Stream Restoration: San Pedro Creek, Pacifica, California.

Abstract

This study evaluates the sustainability of the Capistrano Bridge Fish Passage Restoration Project completed in 2005. The conceptual approach was a direct comparison over time of physical characteristics. The study area includes the restoration area, an upstream reach, and a downstream reach. The primary methods were field observation, measurement of physical conditions, and statistical and qualitative analyses. Degradation occurred in all three reaches, but degradation estimates were highest for the Restoration Reach; the longevity of the logs used to create step-pools was a concern; and larger sediment size and increased transport capacity related to the restoration are likely aiding degradation downstream. Recommendations include developing a management and monitoring plan, more study on log longevity, and increasing storage opportunities to reduce flows in the North Fork sub-watershed.