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Proposed protected instream flows drafted for the Designated Cold River

Date: September 01, 2021

NHDES has completed a study of the designated Cold River to determine the flows needed to protect the river’s biological integrity and its instream uses. Gomez and Sullivan Engineers conducted the field investigations and compiled a report that proposes the protected instream flows. NHDES is now asking for public comments on the establishment of these flows as water quality criteria for the river.

The study evaluated the timing, duration, frequency and magnitude of flows that will support aquatic habitat for fish and support vegetation and wildlife on the rivers banks. Flows that will support recreational uses of the river were also evaluated. The report is available on the NHDES website. A video describing the Instream Flow Program provides background information on the overall purpose and goals of the Program. 

NHDES will hold an informational meeting to describe the study results on Monday, September 27, 2021. The meeting will be held at the Alstead, NH town hall from 7-8:30 PM. Any interested parties are invited to attend. NHDES will also hold a formal public hearing on October 18, 2021 at the Alstead Town Hall from 7-8:30 PM to receive comments. A public comment period will remain open until Wednesday, November 17, 2021 at 4 PM. Contact Wayne Ives, Instream Flow Specialist, at with any questions.