Under a contract with the Corps, Aspen biologists are mapping riparian vegetation communities on the Santa Ana River below Prado Dam.

Prado Basin, Reach 9, and Norco Bluffs SEIS/EIR. Aspen prepared the Final Supplemental EIS and Project EIR for the Prado Basin, Reach 9, and Norco Bluffs components of the Santa Ana River Project in Orange, San Bernardino, and Riverside Counties. The SEIS/EIR was primarily focused on impacts to biological resources. It also examined the impacts associated with stabilizing erosion at Norco Bluffs, changes in inundation levels behind the dam, increased release volumes from Prado Dam under new operations, and bank stabilization downstream (Reach 9) from the dam. Aspen also prepared a 404(b)(1) evaluation, prime and unique farmlands evaluation, and Streambed Alteration Agreement application. During subsequent construction, Aspen has been monitoring construction activities for compliance with mitigation and other environmental requirements, and conducting pre-construction surveys for protected species.