Pilot Butte

The Town of Pilot Butte has grown significantly over the past 15 years, placing a burden on existing wastewater infrastructure. The Town operated a two cell facultative lagoon sized for a contributing population of approximately 2,800, which was discharged twice per year to Boggy Creek ultimately flowing to the Qu’Appelle River system through a series of surface ponds and creeks. As the discharge is to fish bearing waters, the system is required to meet federal Wastewater Systems Effluent Regulations. BCL completed a Downstream Use and Impact Study to establish new effluent targets, and followed with conceptual and preliminary design to modify the existing system process including a SAGR system.

Detailed design was completed in 2019 which includes a first treatment step of a deep aerated partial mix cell, followed by three storage cells with alum feed for phosphorus reduction, and a new pumping station which pumps the effluent into two SAGR cells for ammonia removal. The station recycles a portion of the water back to the system front end to aid in further nitrogen reduction with the remaining portion sent to effluent release. Station design includes a wet/dry style station with 5.8 m deep reinforced concrete substructure.

Project tendering was completed using a contractor pre-qualification process in July of 2019, construction started in September 2019 and substantial completion by November 2020. The facility is the largest in its kind in Saskatchewan, with a capacity to treat wastewater from approximately 7,500 people. The upgraded facility maximized the existing lagoon infrastructure, helping reduce the overall project construction cost to an estimated $9.8M.

• 100 m2 Aeration Building

• 65 m2 Pumping Station

• 3,200 lin.m. of 250 - 400 mm - 2.55 ha HDPE Aeration Cell

• Two 32 m x 90 m SAGR cells - 162,500 m3 compacted clay storage cell

• Downstream Use Impact Study

• Preliminary Design

• Conceptual Layout

• Detailed design

• Tendering

• Resident Engineering - Contract Admin

• Commissioning