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State officials plan 2.5-foot drawdown of Alton Power Dam; removal remains a long-term possibility
Summary
NH Department of Environmental Services announced a 2.5-foot drawdown of Alton Power Dam this spring to support safety and environmental analysis; DES and Fish & Game described alternatives, broad cost ranges, monitoring and a report due in 2027 that will guide whether full removal occurs.
New Hampshire Department of Environmental Services (DES) officials told the Alton Board of Selectmen on Jan. 27 that the state plans a 2.5-foot drawdown of the Alton Power Dam this spring to support sediment and habitat assessments and to reduce risk while consultants complete safety analyses.
Charlie Krautman of DES’s dam bureau opened the presentation by citing a statutory notice (given in the transcript as "Per RSA 4 82 colon 13") and said recent consultant work found the dam lacks sufficient hydraulic capacity and does not meet certain sliding and gravity stability calculations. DES described three alternatives that have been evaluated: (1) remove stop logs and rehabilitate the…
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