New Hampshire Code of Administrative Rules
Env - Department of Environmental Services
Subtitle Env-Wt - Wetlands Programs
Chapter Env-Wt 600 - COASTAL LANDS AND TIDAL WATERS/WETLANDS
Part Env-Wt 607 - DREDGING ACTVITIES
Section Env-Wt 607.05 - Additional Information Required for Dredging Projects

Universal Citation: NH Admin Rules Env-Wt 607.05

Current through Register No. 13, March 27, 2025

(a) In addition to the plan requirements in Env-Wt 603, plans for tidal dredging projects shall include the following:

(1) Location of the state boundary line for projects proposed in the Piscataqua River or Salmon Falls River;

(2) Location of each sediment sampling location, with a key to sampling findings;

(3) Projected dredge prism tied to bottom contours; and

(4) Proposed overdredge, not to exceed 2 feet.

(b) Disposal sites adequate to contain the volume of dredged material, including the volume of allowable over-depth dredging, shall be identified.

(c) Bankward slopes of the dredged area shall be no steeper than 3:1 to ensure that sloughing of the channel side slopes does not occur.

(d) Fishery habitat functions/services in the project areas, including an essential fish habitat study, shall be identified and characterized prior to any dredge and fill activities.

(e) The impacts of dredge or fills on fishery habitat shall be identified during proposed project reviews, including alterations of hydrology and water quality as a result of the proposed project.

(f) The CFA required in Env-Wt 603.04 shall include an assessment of the cumulative impact from past, current, and all reasonably foreseeable future dredge and fill operations that impact aquatic habitats and an anticipated dredge cycle.

(g) Sediment from the proposed dredge site shall be characterized according to the following:

(1) Benthic analysis;

(2) Grain size; and

(3) History of exposure to contamination sources, whether from a land-based discharge source or in-water source from a spill.

(h) If the results of the sediment characterization assessment in (g), above,meet the formula for potential or known contamination, then testing of the sediment in the proposed dredge location shall be as required by:

(1) Requirements for land-based solid or hazardous waste disposal as specified in Env-Sw 100- 2000, Env-Hw 100-1200, and Env-Or 600; and

(2) Regional Implementation Manual for the Evaluation of Dredged Material Proposed for Disposal in New England Waters, US EPA New England and US ACE New England District, dated April 2004, available as noted in Appendix B.

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.
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