Delivery Method: CMAR
Location: Buckeye, Arizona
Value: $23.6 Million
Completed: February 2017

Phase 2A requires the rehabilitation of approximately 5 miles of an embankment dam that is located just north of the Interstate 10 in Buckeye, Arizona. Operations include raising the east end area of the dam, reconstructing a central filter, restoration of existing outlet drains, adding upstream and downstream access ramps, constructing O&M roads, removing an irrigation outlet, hydro-seeding the slopes of the embankment and applying rock mulch.

• Over 4 miles of trenching at average depths up to 40 feet.
• 115,150 tons of filter sand.
• 113,292 cubic yards of processed embankment dirt that meets gradation, moisture, plasticity, and compaction requirements.
• The embankment fill requires handling the material 3 separate times prior to its final placement.
• In place moisture conditioning is not allowed and has to be done prior to placement.
• Use of a custom engineered trench box for hand excavation and removal of an irrigation pipe running perpendicular to the filter at a 27 ft depth.

Location: Colorado River Front CA
Value: 99 Million
Completed: 2010

Water released from Parker Dam near Lake Havasu City takes 3 days to travel down the All American Canal to its destination in the Imperial Valley. Water requests can suddenly change due to weather, high runoff into the river and other reasons. Without a storage capability, this water is lost…some 23 billion gallons of Colorado River water per year.

CSI partnered with Ames Construction to construct 6½ miles of inlet/outlet canals and an 8,000 acre-foot water storage reservoir. More than 7 million cubic yards of excavation material was used to create the reservoir and canal embankment. A total of 3.3 million square feet (40,000 cubic yards) of concrete, 3½ inches thick, was poured.

The project included several cast-in-place inlet/outlet structures which convey water between the reservoir and the canal. Because the project ran under a large interstate highway (I-8) a mile-long 4-lane detour was constructed to allow placement of twin 108-inch welded steel outlet pipes under the roadway. I-8 was restored to its original configuration in just 4 months.

The reservoir itself is lined in a geotextile material – enough to cover 330 football fields – to prevent water seeping into the desert floor.

• 6.5 mi. of canal paved 3.5 inches.
• 7 million cubic yds excavated.
• 40,000 cubic yards of concrete.

Location: Imperial, CA
Value: $31.6 Million
Completed: 2008

In the largest irrigation canal in the world, water flowing from the Colorado River to the thirsty Imperial Valley was seeping into the ground at more than 68,000 acre-feet a year. The Valley’s only source, the canal provides drinking water for nine cities and irrigates over half a million acres.

One of the most ambitious projects it has ever undertaken, CSI was tapped to line 10 miles of the 82-mile long waterway. The canal was 150-feet wide at the top, with a bottom 50-feet wide and a slope of 2:1. There were complications at every turn, from the desert, sandy environment which made truck travel difficult to the need for specialty equipment to accomplish the mammoth task.

Wanting to complete the 4-inch thick concrete paving in just two passes, CSI partnered with specialty equipment manufacturer GOMACO to develop a one-of-a-kind paver capable of laying a path 72 feet wide. Two other special units were developed for this project: a water stop machine capable of inserting water stop material every 15 feet and a work bridge/cure machine from which a curing compound was applied to the entire concrete pour.

5,000,000 cubic yards of earth was excavated by joint venture partner Ames Construction.  Over 850,000 square yards of concrete, 4-inches thick was poured. CSI completed the project within budget and ahead of schedule following strict procedures from material delivery to final finishing.

• 10 miles of canal paved in just 2 passes.
• 43 truckloads of specialty equipment delivered to the sandy, desert site.
• 95,000 cubic yards (175 acres) of concrete.
• 182 miles of water stop material inserted in a 15-foot grid pattern.