Nine Mile Gravity Sewer

The proposed project involves demolition of the existing Nine Mile Lift Station and force main, and rerouting gravity sewer flow approximately 2,800 linear feet from the Nine Mile Creek area west to connect to an existing gravity sewer pipeline near the Wallace Visitor Center. The proposed project also involves re-aligning a portion of gravity sewer south of I-90 and connecting it to the District’s interceptor pipeline in Silver Valley Road.

Copies of the Contract Documents may be obtained electronically at at no cost.



Working together, we can protect our health, our homes and our environment

I/I costs everyone

I/I is clear water—storm water and groundwater—that enters the wastewater system. It overloads the system and can cause costly sewer backups into homes and buildings. I/I can also cause sewer overflows into rivers and lakes.



Protect your home and community


Up to 80% of I/I comes from private sources, including defective sewer service lines and improperly connected sump pumps, downspouts and foundation drains. Excessive I/I increases the need to build larger and more expensive sewer pipes and treatment facilities.

You can reduce inflow and infiltration

Property owners can:

  • Inspect and repair damaged sewer service lines.

  • Replace older clay pipes that are beyond their service life.

  • Make sure sump pumps and building drains are not connected to the sanitary sewer system. (click the link below to see examples)

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