Big Sky County Wastewater Pond3

About Big Sky County Wastewater Pond3

Big Sky County Wastewater Pond3 is a dam in Gallatin, Montana. The dam is owned by Big Sky County Water And Sewer District (local government). It impounds the Offstream near Big Sky.

The dam stands 22 feet tall and stretches 580 feet across, and has a maximum storage capacity of 60 acre-feet. Completed in 1997, the structure is 29 years old.

This dam carries a high hazard potential classification, which means that a failure or uncontrolled release of water would likely cause loss of human life. This classification reflects the consequences of failure, not the likelihood — it indicates that people live or work in the area downstream. The most recent inspection on record was 12/18/2007. That was 18 years ago — unusually long for a high-hazard dam, which typically requires more frequent inspections.

Living Downstream

If you live or work downstream of this dam, consider taking these steps: learn your local evacuation routes, check whether your county emergency management office has a dam failure inundation map, and sign up for local emergency alerts. The Montana dam safety program can provide more specific information about emergency planning for this structure.

Search for dams near your address to see all dams in your area with hazard classifications and safety data.