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 517.05 - Design and Construction Requirements for Boardwalks
Current through Register No. 13, March 27, 2025
In addition to meeting the applicable design and construction criteria in Env-Wt 300, boardwalks shall meet the following design and construction requirements:
(a) Boardwalks shall not be located in or through any PRA if the use associated with the boardwalk would jeopardize the continued existence of protected species or habitat;
(b) To allow for circulation of air and water and penetration of light, boardwalks shall be designed and constructed:
(c) Boardwalks shall be at least 3 feet wide and no wider than 6 feet;
(d) Boardwalks crossing wetlands shall be designed and located to:
(e) Boardwalks shall incorporate features designed to educate users about the importance of wetlands, transition areas, and public waters;
(f) Boardwalks shall be constructed using top-down construction methods, helical piles, and other methods to limit impacts to sensitive wetlands and surface waters;
(g) A boardwalk shall not be supported by horizontal support timbers, otherwise known as sleepers, on or in the soil, except that on hiking trails, a log foot bridge may have timber sleepers on the soils; and
(h) The root mat and soil under and around the boardwalk shall not be disturbed except to drive pilings.