Skip to main content

Doe Run Water Treatment Program

Multiple Locations Across Missouri

Helping treat mine water to meet stringent EPA standards



Key Services




Strategic Partnerships

Delivery Method
Progressive Design-Build (PDB)
68 MGD

The challenge

CAS Constructors, an Alberici enterprise, was engaged to construct five wastewater treatment plants for The Doe Run Company at mines across southeast Missouri, each adhering to the Environmental Protection Agency’s (EPA) strict mandates due to a consent order. With the EPA pressing for rapid compliance, the challenge was to execute a design-build solution that would construct these plants within an aggressive schedule while ensuring that Doe Run would not face penalties for non-compliance.

Key Facts

The total program included 5 wastewater treatment plants

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

Challenge met

In response to stringent EPA regulations and an aggressive timeline, CAS Constructors orchestrated a strategic design-build joint venture to construct five wastewater treatment plants for The Doe Run Company at mines in southeast Missouri. Implementing the innovative CoMag System, these plants, ranging from 7.2 MGD to 26 MGD capacity, met EPA requirements for removing heavy metals and contaminants from mining wastewater.

During the construction of the first plant, our team uncovered a potential to enhance processing capacity significantly. This led to a reevaluation of equipment and processes, doubling capacity without major capital increases. The team extended this approach to ready other plants for future expansion. Alberici and CAS Constructors utilized their equipment fleet to maintain the ambitious schedule when faced with unimproved sites and rock excavation. The team’s solutions ensured Doe Run’s compliance and avoided penalties, demonstrating our strategic planning and effective execution.

Recent Projects

Wichita Northwest Water Treatment Facility

Mississippi River Floodwall & Pump Station Rehabilitation

Platte West Water Treatment Plant