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New Hampshire Department of Environmental Services

Dam Bureau
Dam Permit

To protect and regulate the water levels of lake and ponds and the flow of water for fire prevention, lessen flood damage, the maintenance and improvement of recreational facilities, and to ensure that dams are maintained in a manner so that public, health, safety and the environment are protected.

Applies to non-permitted existing dams, the repair or reconstruction of dams, and the construction of new dams and hydro-energy production facilities. An application to construct a dam must be filed by the property owner(s) on which the proposed dam is located. An application to reconstruct a dam, including an application relative to emergency measures described in Env-Wr 401.02(a)(2), must be filed by the owner(s) of the dam. An application to register the dam must be filed by the property owner(s) on which the proposed dam is located.

Statute and Administrative Rules
RSA 482 Dams, Mills and Flowage
Env-Wr 100-700 Dam Rule

Application to Register an Existing DamMicrosoft Word Symbol
Application to Construct or Reconstruct a DamMicrosoft Word Symbol

A $2,000 filing fee is required to accompany the application. An additional fee may be required upon determination of hazard classification or if the dam is for hydropower production. Additional application fees are:
Low hazard – $1,000
Significant or high hazard – $2,000
Hydropower development – $100 deposit

Annual dam registration fee bills are sent to dam owners in October, with payments due by January 1 of the following calendar year. The annual dam registration fee schedule is:
Low Hazard – $400
Significant Hazard – $750
High Hazard – $1,500

Processing Time
Typically within 60 days upon receipt of a complete application.

Term is two years. Renewal may be requested by submitting a written request to the Dam Bureau at least 30 days prior to expiration of the existing permit.

Minor modifications may be requested in writing to the Dam Bureau.

Dam owners may transfer permits to a new owner by providing the Dam Bureau written notification that includes the name and address of the new owner.

Any person aggrieved by a final decision can appeal the decision to the Water Council in accordance with Env-WC 200. 

Status of Current Applications
Contact Steve Doyon at or (603) 271-3406.

More Information
Dam Bureau
New Hampshire’s Definition of a Dam Adobe Acrobat Reader Symbol(9/11/2009)
Dam Construction and Reconstruction: How to Proceed Adobe Acrobat Reader Symbol(Fact Sheet WD-DB-3)
What is the "Annual Dam Registration Fee"? Adobe Acrobat Reader Symbol(Fact Sheet WD-DB-21)
Acquiring a Dam Adobe Acrobat Reader Symbol(Fact Sheet WD-DB-20)

Contact Us
Dam Bureau or or (603) 271-3406.



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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