New Hampshire Code of Administrative Rules
Env - Department of Environmental Services
Subtitle Env-Wt - Wetlands Programs
Chapter Env-Wt 500 - PROJECT-SPECIFIC REQUIREMENTS
Part Env-Wt 517 - TRAILS, PATHWAYS, AND BOARDWALKS
Section Env-Wt 517.07 - Classification of Boardwalk Construction or Maintenance Projects

Universal Citation: NH Admin Rules Env-Wt 517.07

Current through Register No. 13, March 27, 2025

(a) A boardwalk construction or maintenance project shall be classified as minimum impact if the project:

(1) Will have a total wetland impact area of not more than 3,000 SF as measured by the surface area of the boardwalk, except that log foot bridges on trails may have up to 3,000 SF of wetland impact per crossing;

(2) Disturbs not more than 50 LF of a surface water body, measured along the shoreline of a lake or pond at its bank; and

(3) Will have no adverse impacts to a marsh, scrub-shrub wetland adjacent to a surface waterbody, floodplain wetland adjacent to a water course, cedar swamps, or PRAs, except as provided in Env-Wt 407.

(b) A boardwalk construction project shall be classified as a minor impact project if the project:

(1) Will have a total area of more than 3,000 SF but less than 10,000 SF;

(2) Disturbs between 50 LF or more but less than 200 LF of a surface water body, measured along the shoreline of a lake or pond at its bank; or

(3) Disturbs between 50 LF or more but less than 200 LF of an intermittent or perennial non-tidal watercourse channel or banks, provided that:
a. For intermittent streams, the distance shall be measured along the thread of the channel; and

b. For perennial streams, the total disturbance shall be calculated by summing the lengths of disturbances to the channel or banks.

(c) A boardwalk construction project shall be classified as a major impact project if the project:

(1) Will have a total area of 10,000 SF or more;

(2) Disturbs 200 LF or more of a surface water body, measured along the shoreline of a lake or pond at its bank;

(3) Alters the course of or disturbs 200 LF or more of an intermittent or perennial non-tidal watercourse channel or banks, provided that:
a. For intermittent streams, the distance shall be measured along the thread of the channel; and

b. For perennial streams, the total disturbance shall be calculated by summing the lengths of disturbances to the channel or banks;

(4) Has any impacts in tidal marsh, tidal waters, tidal flats, or sand dunes; or

(5) Creates a pathway across public waters or new access way across surface waters that exceeds Env-Wt 400 criteria.

Disclaimer: These regulations may not be the most recent version. New Hampshire may have more current or accurate information. We make no warranties or guarantees about the accuracy, completeness, or adequacy of the information contained on this site or the information linked to on the state site. Please check official sources.
This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.