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North Davis Wastewater Treatment Plant Upgrades and Expansion

Expanding to handle projected future flows and pollutant loadings

  • 25K

    Square Feet

  • 34MGD


  • Layton, Utah

    Layton, Utah

Award-winning design-build plant expansion

On this award-winning, design-build project, we increased the average daily wastewater treatment capacity from 25 to 34 MGD with peak flow capacity of 65 MGD, and an allowance to pass a storm flow of 102 MGD. The improvements doubled the daily biochemical oxygen demand and total suspended solids treatment capacity, while providing a better-quality effluent.

We sequenced 10 task orders and supplied a guaranteed maximum price for each one. This phased approach distributed the District’s capital expenditures over a five-year period while considering the plant’s operational and governmental requirements for discharges into the Great Salt Lake.

The facility used solar drying beds to dewater biosolids, which caused periodic seasonal solids backup and contributed to effluent quality problems. Through a series of value engineering workshops, we developed solutions to this challenge and others.

At a Glance

  • North Davis Sewer District
Intermountain Contractor: Best Design-Build Project
Intermountain Contractor: Best Mechanical Engineering/ Construction Project

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