La Jolla Recharge Basin

Butier Engineering, Inc. provided construction management and inspection services for the construction of the 6-acre wetted-area recharge basin. The project involves the following components:

• Demolition of existing at-grade structures across the 8.6-acre property
• Excavation and hauling 83,000 cubic yards of soil to construct a 6-acre wetted-area recharge basin
• Recharge inlet facilities consisted of an inflatable rubber dam, concrete foundation and downstream riprap and associated facilities for dam inflation and deflation
• Creek outlet structure with automatic debris screen, solids handling and associated facilities
• Approximately 100 feet of 30-inch steel CMLC pipe with motor-operated isolation valve and flow meter
• Basin inlet structure
• Recharge basin outlet facilities, consisting of 100 feet of 36-inch steel CMLC pipe; basin outlet structure with sluice gate; creek inlet structure with flap gate; and wetwell, sump pump, and associated discharge piping and appurtenances
• Control building and facilities consisting of a concrete block structure with 8 foot by 10 foot interior space containing a stilling well and dam automatic deflation device, blower for dam inflation, and MCCs and PCLs for aforementioned facilities
• All electrical and instrumentation, including video surveillance cameras and lighting