Los Angeles County Drainage Area UPRR Bridge and Chevron Bridge

Aspen Environmental Group prepared Supplemental Environmental Assessments (SEAs) for design modifications to the original Los Angeles River Improvement Project. These modifications included Design Memorandum 3 (Lower Los Angeles River), Design Memorandum 4 (Rio Hondo Channel), UPRR Bridge Relocation, UPRR Bridge and Chevron Utility Bridge Reconstruction, and Riprap Repairs (Ocean Blvd. to Willow Street). In addition to completing these SEAs, Aspen also completed a comprehensive Air Quality General Conformity Analysis for the entire Los Angeles River Improvements Project. Upon completion of these reports, Aspen monitored the implementation of the mitigation measures (listed in the original EIS/EIR and SEAs) during construction of the project.