Bond Basin Slope Repair

Client:

Orange County Water District

Location:

Orange, California

Value:

$2.5 million

Completion:

Summer 2026

Contractor:

Innovations Construction Solutions

Designer:

ENGEO

Butier Engineering, Inc. is providing construction management and inspection services for this project.  The Bond Basin Slope Repair project will permanently repair the slope and include the following:

• Temporary Construction Access: Build and maintain temporary roads and work areas within the basin to access the repair site.
• Slope Repair: Excavating unstable landslide debris to firm native subgrade. Approximately 10,000 cubic yards of approved fill material will be keyed and benched into the existing slope. Fill will be reinforced with geotextile fabric. The cavity below the existing soil nail wall will be backfilled with approximately 500 cubic yards of control-density fill. Approximately 1,200 cubic yards of usable fill material is stockpiled on-site, and approximately 8,800 cubic yards of approved material will be procured and transported to the site.
• Storm Drain Relocation: Relocating and abandoning a 60-inch storm drain outlet. Installing approximately 270 linear feet of 60-inch reinforced concrete pipe and three storm drain manholes connecting the existing 60-inch storm drain to the new swale and plunge pool.
• Concrete Swale and Plunge Pool Construction: Construction of a concrete headwall, grade beam, and piers connected to the 60-inch storm drain. Construction of a 10-foot-wide concrete swale with a 10-foot by 4-foot section of 1/4 to 1/2 ton grouted riprap placed on each side. The swale discharges into a plunge pool consisting of 1/4 to 1/2 ton of grouted riprap and 105 to 300 pounds of rock.