Location: Butte, Montana
Project Type: Water Resource Engineering, Environmental Remediation

The Silver Bow Creek project is a large, multi-year, Superfund cleanup project administered by Montana Department of Environmental Quality (DEQ). Silver Bow Creek originates in Butte, Montana, and flows approximately 24 miles through Silver Bow and Deer Lodge Counties to the Warm Springs Ponds to become one of the tributaries to the Clark Fork River. The remedial action activities for the Streamside Tailings Operable Unit (SST OU) project include excavation of ~4 million cubic yards of mine tailings distributed over 1,600 acres of floodplain along a 24-mile long reach of the creek. Pioneer has provided engineering and construction services for the project since 2002, with the goal of addressing adverse impacts to Silver Bow Creek and its floodplain from past mining activities in the region.

Location: East Helena, MT
Project Type: Water Resource Management, environmental

Near Helena, Montana, Prickly Pear Creek was contaminated after a century’s worth of smelter activities deposited arsenic, lead, and other containments into its groundwater and soil. A 5-year clean-up solution included lowering the level of groundwater and restoring the creek to its natural channel. This included moving over a million cubic yards of materials.

Location: Divide, Montana, to Butte, Montana
Project Type: Infrastructure, Municipal, Construction Oversight

The Butte-Silver Bow (BSB) Big Hole Transmission Line is the primary potable water supply pipeline into Butte, Montana. This project goal is to replace all 21 miles of this pipeline. Since 2008, Pioneer has designed, permitted, and provided construction oversight to rehabilitate approximately 75,000 linear feet of the BSB Big Hole Transmission Line.

Location: Musselshell River Basin, Montana, and Roundup, Montana
Project Type: Survey and Assessment

The Musselshell River communities are working with the Federal Emergency Management Agency (FEMA) and the Montana Department of Natural Resources and Conservation (DNRC) to update floodplain maps for the Musselshell River. New floodplain maps will depict the latest, most accurate flood risk data, allowing property owners and communities to understand their flood risk and to protect themselves against flooding.

Location: Evanston, Wyoming
Project Type: Oil and Gas, facility decommissioning

The Whitney Canyon Gas Plant (WCGP) was a former 250-million standard cubic feet per day (MMscf/d) gas plant used to process sour reservoir fluids to produce marketable hydrocarbon products. Constructed in 1980, the plant was taken out of service in 2009. Soon after, Pioneer began work at the site providing the initial strategic planning, site investigation, reclamation design, and general project and on-site management.

Location: Wallace, Idaho
Project Type: Environmental Remediation, Abandoned Mine Land Reclamation, Construction Management

Within the Upper Basin of the Bunker Hill Mining and Metallurgical Complex Superfund Site, the East Fork of Ninemile (EFNM) Creek drainage area is located within the Coeur d’Alene Mining District of Northern Idaho, the site of one of the world’s largest concentrations of silver. Over 1.2 billion Troy ounces of silver have been mined from the District since 1884. Significant amounts of associated copper, lead, zinc, and antimony have also been produced from mines in the District