Location: Carlsbad, California
As a result of the significant rainfall in December 2010, severe erosion and bank sloughing had occurred along San Marcos Creek within the La Costa Resort and Spa Property, causing an immediate threat to public safety, employee safety, and property. A structure and bridge abutments located immediately upstream were significantly exposed as a result of the large flows. Emergency repairs were needed to prevent further loss of property via stabilization of the northern slope of the creek while reestablishing jurisdictional areas lost to the erosion. Michael Baker International prepared and acquired emergency resource agency permits through the U.S. Army Corps of Engineers (USACE), the Regional Water Quality Control Board, and the California Department of Fish and Wildlife for the repairs. Emergency on-site meetings were organized with USACE staff during the holiday season. Once the engineered approval was set, a bioengineered/bioremediated terraced riprap stone bank was constructed in order to mitigate for impacts by allowing plant reestablishment. Michael Baker’s work effort also included preparation of a habitat mitigation and monitoring plan and a California Rapid Assessment Method (CRAM) analysis.