Penitencia Water Treatment Plant

In an effort to expand and modify the existing 42-million-gallon-drum plant, Kiewit Pacific Co., a subsidiary of Kiewit Corporation, completed Phase II of a $42 million contract to improve water quality and plant operations at the Penitencia Water Treatment Plant.

Crews constructed a two-story, 7,200-square-foot ozone generation building, an ozone contactor structure, a liquid oxygen storage and vaporizer structure, various pipelines, transition structures, a sulfuric acid storage area, a plant water pump station, three load centers, a sulfuric acid metering building and a hydrogen peroxide facility. In addition, crews installed ozonated and settled water pipelines, an electrical distribution system, a control system and a new emergency generator.

Major quantities included 8,000 cubic yards of concrete, 77,000 cubic yards of grading, 7,200 feet of aboveground pipe, 14,000 feet of underground pipe, seventeen 36-inch to 54-inch pipe tie-ins and 10,000 feet of duct banks.

Prior to construction, early detection of site conditions warranted a substantial disruption in excavation and shoring work due to elevated groundwater levels, shear zones and asbestos deposits. The team's willingness to enhance client relations and promote teamwork contributed to the overall success of the project.