N.H. Admin. Code § Env-Wr 403.02

Current through Register No. 50, December 12, 2024

Section Env-Wr 403.02 - Minimum Design Requirements of All Dams

An application for construction of a new dam or reconstruction of an existing dam shall incorporate the following design requirements:

(a) The embankment slopes shall be no steeper than 2.5 horizontal to 1 vertical unless a specific design for a steeper slope shows that the embankment is stable and capable of being safely maintained;

(b) The embankment top width shall be 6 feet or greater;

(c) Any earthen spillway shall be constructed in natural ground;

(d) Soil compaction specifications shall be shown on the plans; and

(e) Pre-compacted lift thickness shall be compatible with the material and equipment to be used, but no greater than 12 inches in depth.

N.H. Admin. Code § Env-Wr 403.02

#1716, eff 2-20-81; ss by #2207, eff 12-13-82; ss by #2900, eff 11-7-84, EXPIRED 11-7-90

New. #5080, eff 2-22-91; rpld by #6462-B, eff 2-21-97

New. #8414, eff 8-20-05; ss by #10510, eff 1-22-14