Experience • Engineering

Mountain Green Wastewater Treatment Plant Expansion

  • Client Mountain Green Sewer Improvement District

  • Location Mountain Green, Utah

  • Services Wastewater treatment planning and feasibility analysia, Preliminary and final engineering design, Funding assistance, Bidding and construction management, Biological nutrient removal (BNR) treatment design, Future capacity and expansion planning

Project Highlights

  • Expanded and upgraded Mountain Green’s existing lagoon-based wastewater treatment system to a 1.5 MGD mechanical biological nutrient removal (BNR) facility, supporting continued community growth.

  • Designed the treatment system for future expansion to 3.0 MGD, providing the District with a scalable approach to long-term wastewater needs.

  • Converted an existing clay-lined lagoon into an HDPE-lined BNR basin with aeration to improve treatment performance and nutrient removal.

  • Incorporated mechanical screening, grit removal, secondary clarification, aerobic digestion, solids dewatering, disc filtration, and UV disinfection into the upgraded treatment process.

  • Designed the facility to address phosphorus requirements, including a phosphorus limit below 1 mg/L, while balancing capital and operating costs.

  • Provided comprehensive support from treatment alternatives analysis and planning through design, funding, bidding, and construction management.