Ames constructed the 400-acre-feet Citrus Reservoir in San Bernardino County, California, performing earthwork, pouring stilling wells and an inlet chute, and crushing aggregate on site. Ames also produced and placed compacted soil liner, along with asphalt mastic that is squeegeed over the entire liner to create a watertight surface. Materials required specifications above the ASTM and ACI standards because of the restricted access for maintenance once the reservoir became operational.
Completed several months ahead of schedule, the project was performed in an environmentally sensitive area that is home to the endangered San Bernardino kangaroo rat. This subspecies of the Merriam kangaroo rat is found only in San Bernardino and Riverside Counties. The animals were captured and relocated to allow for use of the specified right-of-way needed for stockpiles during project construction.