N.H. Admin. Code § Env-Wt 609.07

Current through Register No. 45, November 7, 2024

Section Env-Wt 609.07 - Tidal Shoreline Stabilization Using New Hard-Scape or Rip-Rap

(a) The department shall not approve any tidal shoreline stabilization plan that proposes to install new rip-rap unless:

(1) The applicant demonstrates that:

a. Anticipated turbulence, flows, restricted space, fetch, or similar factors render soft stabilization methods physically impractical; and

b. Natural areas or naturalized soft shoreline stabilization on neighboring properties will not be damaged by the placement of the proposed rip-rap; or

(2) The rip-rap is a component used as a sill to stabilize the toe, but is not the primary or dominant component of a living shoreline stabilization design.

(b) The applicant proposing to install new rip-rap shall include with the application:

(1) Evidence of erosion that cannot be stabilized solely with a soft stabilization design;

(2) A description of anticipated turbulence, flows, restricted space, fetch, or similar factors that render vegetative and diversion methods physically impractical;

(3) An assessment of the potential for the proposed rip-rap to erode the shoreline of neighboring properties, based on an examination of the shoreline and modeling based on tides, average wave height and force, and the energy absorption or deflection ability of the proposed rip-rap;

(4) Specification of:

a. Minimum and maximum stone sizes;

b. Existing contours and final proposed contours;

c. The volume of rip-rap to be used;

d. The minimum and maximum rip-rap thickness; and

e. The type and thickness of bedding for the stone;

(5) Cross-section and plan views of the proposed installation; and

(6) The relationship of the project to fixed points of reference, abutting properties, and features of the natural shoreline.

(c) In addition to plan requirements specified in Env-Wt 311, applications to use rip-rap adjacent to tidal water bodies shall:

(1) Include stamped engineering plans; and

(2) If the state holds fee simple ownership, a stamped survey showing the location of the mean high water tide line on the shoreline and the footprint of the proposed project.

N.H. Admin. Code § Env-Wt 609.07

Derived from Volume XXXIX Number 28, Filed July 11, 2019, Proposed by #12806, Effective 12/15/2019, Expires 12/15/2029.