New Hampshire Code of Administrative Rules
Env - Department of Environmental Services
Subtitle Env-Wt - Wetlands Programs
Chapter Env-Wt 900 - STREAM CROSSINGS; CERTIFIED CULVERT MAINTAINER PROGRAM
Part Env-Wt 904 - DESIGN AND CONSTRUCTION OF STREAM CROSSINGS
Section Env-Wt 904.08 - Repair, Rehabilitation, or Replacement of Tier 1 or Tier 2 Existing Legal Crossings

Universal Citation: NH Admin Rules Env-Wt 904.08

Current through Register No. 13, March 27, 2025

(a) Repair, rehabilitation, or replacement of a tier 1 or tier 2 stream crossing shall be limited to stream crossings where:

(1) The contributing watershed is as specified for the tier; and

(2) The certification specified in (b), below is provided.

(b) A project to repair, rehabilitate, or replace a tier 1 or tier 2 crossing shall qualify under this section only if a professional engineer certifies that:

(1) The existing stream crossing does not have a history of causing or contributing to flooding that damages the crossing, other human infrastructure, or protected species or habitat, or any combination thereof; and

(2) The proposed stream crossing will:
a. Meet or exceed the general criteria specified in Env-Wt 904.01;

b. Maintain or enhance the hydraulic capacity of the crossing;

c. Maintain or enhance the capacity of the crossing to accommodate aquatic organism passage, or both;

d. Maintain or enhance the connectivity of the stream reaches upstream or downstream of the crossing, or both; and

e. Not cause an increase in the frequency of flooding or overtopping of banks upstream or downstream of the crossing, or both.

(c) Rehabilitation of a culvert or other closed-bottom stream crossing structure pursuant to this section may be accomplished by concrete repair, slip lining, cured-in-place lining, or concrete invert lining, or any combination thereof, except that slip lining shall not occur more than once.

#9714, eff 5-12-10

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.