Cub River Watershed-EA


Cub River Project Public Meeting:

In order to follow COVID-19 safety practices, this meeting will be held virtually.

Date: Thursday, November 19, 2020
Time: 6 – 7:00pm

Thank you to those who attended the meeting! Missed it? Don’t worry, we recorded it! Please click here to read more details about how to watch the recording.


What now?

Now that the public scoping meeting has occurred, the 30-day comment period has begun. You have until December 18th to submit a formal comment about the project. If you didn’t attend our meeting or you haven’t watched the recording yet, we suggest you start there. After you have the background information about the project, we would love your input. The link to submit a formal comment is below.

Then, if you’re interested in receiving updates on the project, please fill out our survey form (link also below) with your contact info. We’ll continue to keep you in the loop.


Project Links

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Project Purpose and Need:

The proposed project would address two of the eight purposes listed in Title 390, National Watershed Program Manual (NWPM), Part 500, Subpart A, Section 500.3.

  • Flood Prevention (Purpose 1) would be addressed by installing a storm drain system in Lewiston City and surrounding agricultural lands by reducing water in the soil profile and improving and increasing the capacity of the local drainage districts’ existing infrastructure.
  • The project would also address Agricultural Water Management (Purpose 5) by eliminating seepage along the main canal. This would be accomplished by installing a pressurized pipeline to conserve water, reduce water in the soil profile, reduce maintenance issues, and increase pumping efficiencies.

Local farmers and residents of Lewiston City need to rely on storm water infrastructure to protect their homes, businesses, and livelihoods. They have dealt with drainage issues and insufficient storm water infrastructure for many years. The city has limited storm water infrastructure to route flood flows and is heavily affected by the spring flooding. In 2017, significant damage occurred including flooding homes, businesses, and agricultural fields due to an intense rain event. The project would provide new and upgraded drainage infrastructure to existing systems to capture and convey flood flows, up to the 100-year flood elevation, to the Cub and Bear Rivers, while meeting all current safety and performance standards.

Shareholders of the Cub River Irrigation Company that depend on water from the Cub and Bear Rivers need an efficient, reliable irrigation water supply and a sustainable conveyance system. Seepage from the main canal saturates the soil profile, thereby limiting the amount of water that can infiltrate the soil profile during spring runoff and other flood events. Enclosing the canal will restore the lands to full agricultural production and conserve up to 7,700 acre-feet of water annually, thereby increasing crop production and providing higher cash cropping options to farmers.