San Gabriel River Drop Structures 3, 4, 5, and 8
Los Angeles County, CA
Customer/Owner Name: U.S. Army Corps of Engineers
Point of Contact: Stan Fujimoto, Contracting Officer

Description: CJW Construction, Inc. was awarded a $1,599,000.00 contract to repair damaged existing concrete drop structures #3, 4, 5 and 8 at the Santa Fe Flood Control Basin just north of the Santa Fe Dam located in Los Angeles County, City of Azusa, CA. The Owner of the Project was the US Army Corps of Engineers.

The scope of work included: preparing access route plan, establish new construction routes, construct access ramps, and staging areas; dewatering of existing drop structures, diversion and water control; demolish and dispose of existing concrete, restoration of existing weep holes, protection and pressure washing of all existing grouted stone, construction and placement of reinforced concrete slabs; preparation of spill prevention plan and fire prevention plan.

Outstanding CCASS Evaluation from Owner

Challenges: The major challenge of this project was that Los Angeles County only provided a 10-day window to perform the work and complete the project.  This project was in an existing river bed which receives the discharge water from the Santa Fe Dam.   To address this extremely short timeline CJW ran shifts 24-hours a day completing the project in the 10 working day window and 140 days ahead of schedule.   This project was completed within budget.

Additionally, the only access to the drop structures was via a public bike trail.  CJW had to work around trail users and keep the area open for use, while minimizing noise.  To minimize the impact on the trail CJW poured 550 CY over Concrete during nighttime shifts.  This allowed the trail to remain open for exercise enthusiast.
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C J W   C O N S T R U C T I O N,   I N C.
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