Water Quality

Poudre Canyon 8-11 010


As part of the federal permitting process, a 401 Water Quality certification – the state's review of the water quality impacts associated with the project – is required before the U.S. Army Corps of Engineers can issue its final approval with a 404 permit and Record of Decision.

On Jan. 31, Northern Water this past week submitted its 401 application regarding NISP to the Colorado Water Quality Control Division. The state now has a year from the application date to approve, conditionally approve or deny the certification.

The submission of this application comes as part of an ongoing, collaborative process that Northern Water has been engaged in during recent years. Those efforts, among others, have included data collection and monitoring along the Poudre River, temperature modeling, examining potential NISP-related water quality and temperature impacts, and developing mitigation measures.