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.
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