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Water

Doe Run Company Water Treatment Program

Multiple Locations, Missouri

Treating mine water to meet stringent EPA standards.

Key Services

Construction

Preconstruction

Self-Perform

Strategic Partnerships

Delivery Method
Progressive Design-Build (PDB)
Capacity
68 MGD

The challenge

The Doe Run Company was required to construct five wastewater treatment plants across southeast Missouri to comply with the Environmental Protection Agency’s (EPA) strict regulations under a consent order. With the EPA pressing for rapid compliance, the challenge was to design and build these plants on an aggressive schedule, ensuring Doe Run avoided penalties for non-compliance. Each plant needed to meet stringent requirements for removing heavy metals and contaminants from mining wastewater.

Key Facts

Engineering Excellence Award – American Council of Engineering Companies, Missouri Chapter


Total of five wastewater treatment plants

Challenge met

In response to EPA mandates and tight deadlines, CAS Constructors delivered five wastewater treatment plants for The Doe Run Company through a design-build joint venture. The innovative CoMag System was implemented at all plants to efficiently remove heavy metals and contaminants from mining wastewater, with capacities ranging from 7.2 MGD to 26 MGD..

During the construction of the first plant, the team identified a potential to significantly enhance processing capacity. This led to a reevaluation of equipment and processes, successfully doubling the plant’s capacity without major capital increases. The team extended this forward-thinking approach to prepare the other plants for future scalability.

To address challenging site conditions, including unimproved locations and extensive rock excavation, the team relied on CAS Constructors’ equipment fleet and expertise. These efforts ensured the project stayed on schedule, avoided penalties, and enabled Doe Run to meet EPA compliance standards while supporting sustainable mining operations in southeast Missouri.

Recent Projects

Bonner Springs Water Treatment Plant

Wichita Northwest Water Facility

Hutchinson Wastewater Treatment Facility Intermediate Pump Station Improvements