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New Hampshire Department of Environmental Services

Flood and Geologic Hazards Program
fluvial erosion

In the public imagination, the enduring "Granite Hills" of New Hampshire are commonly associated with an image of perpetual rock-hard stability and resistance to change. However, like every other place on this planet, dynamic natural forces are always at work to shape the landscape around us. Mostly they act so imperceptibly as to go unnoticed from year to year or even over an entire lifetime. None will ever come close to rivaling the extreme changes that occurred as the last continental glacier advanced and retreated more that ten thousand years ago. Yet, from time to time, we are reminded that geologic hazards do exist in New Hampshire and that society is best served by avoiding vulnerable areas if possible and planning an effective response to any natural disaster before it occurs. more …

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NHGS provides assistance relative to assessing and addressing flood hazard risks. For information regarding the flood and geologic hazards program, or questions relating to river geomorphology, contact Shane Csiki at NHGS: (603) 271-2876 or

The program is home to the state-owned river modeling flume, which shows how rivers work, and how actions undertaken on a river, such as undersized culverts, can affect river processes. Demonstrations are primarily tailored to community officials. If you have questions, or would like to schedule a flume demonstration, contact Tom Taggart at NHGS: (603) 271-5762 or

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  • Shane Csiki, Ph.D., CFM
    Flood Hazards Program Administrator
    New Hampshire Geological Survey
    29 Hazen Drive, PO Box 95
    Concord, NH 03302-0095
    (603) 271-2876
    (603) 271-3305 (fax)
  • Rick Chormann
    State Geologist and Director
    New Hampshire Geological Survey
    29 Hazen Drive, PO Box 95
    Concord, NH 03302-0095
    (603) 271-1975
    (603) 271-3305 (fax)



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NH Department of Environmental Services | 29 Hazen Drive | PO Box 95 | Concord, NH 03302-0095
(603) 271-3503 | TDD Access: Relay NH 1-800-735-2964 | Hours: M-F, 8am-4pm

copyright 2017. State of New Hampshire