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Bob Molder, Wastewater Services Manager

Wastewater Treatment Plant
3101 S Garner Lake Rd
Gillette, WY 82718
Phone (307) 686-5274
Fax (307) 686-7699
Send an E-mail

Click Here for more information on the Yard Waste Drop-off Center and Curbside Collection.

The Wastewater Division collects and treats the wastewater produced by the citizens and businesses of Gillette. The Wastewater Division operates and maintains about 200 miles of sewer line and 10 lift stations. The wastewater is treated at a conventional activated sludge treatment facility with anaerobic digestion and UV disinfection.

Wipe Out Backed-Up Sewers

The wastewater treatment facility (WWTF) treats an average of 3.04 MGD (million gallons per day). We also reclaim the solids which are composted and sold to the public as the Class A biosolids product known as Stonepile Soil Amendments.

Compost is $20 per cubic yard for Stonepile Soil Amendments (Biosolids) and Yard Waste compost. 

Processed wood chips are available for $20 per cubic yard.

Click Here to check the availability of Compost. 

The Yard Waste Drop Off site will open for the season on Friday, May 1st at 8:00 a.m.
Yard Waste Drop off times:   
8:00 a.m. - 4:00 p.m. 6 days a week (Closed on Sunday)

Pickup times for Compost:   8:00 a.m. - 4:00 p.m. 7 days a week


This chart illustrates the proposed capital improvements that will be made to the plant over the next 5 years. Please note that the projects are divided into Optional 1% Projects and projects that will be paid through the proposed rate increases. Over 77% of the improvements will be financed by the Optional 1% Sales Tax

Wastewater Industrial Commercial Discharge Application (aka Wastewater Survey) [PDF]

Other Links:

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