N.H. Code Admin. R. Env-Wr 502.09

Current through Register No. 25, June 20, 2024
Section Env-Wr 502.09 - Review of Breach Analysis by Department
(a) The owner shall submit the following to the department for review:
(1) Structural and hydraulic breach assumptions and base flow criteria;
(2) Methods for determining base flows;
(3) Structural stability analyses of downstream dams, if applicable; and
(4) Summary of the results of the breach analysis.
(b) The owner shall submit inundation maps prepared in accordance with Env-Wr 503 for review, by submitting draft inundation maps with the information listed in (a), above, or after receiving approval of the breach analysis.
(c) If the information submitted pursuant to (a), above, is incomplete or the dam failure is incorrectly modeled, the department shall, within 60 days of receipt of the information, notify the owner in writing of the items which need to be addressed and the deadline for submittal of the amended analysis, which shall be 60 days from the date of the notice.
(d) If the information submitted pursuant to (a), above, is complete and failure is correctly modeled, the department shall, within 60 days of receipt of the submitted information:
(1) Determine whether the sunny day failure or the 100-year flood failure represents the most critical threat to the downstream community; and
(2) Notify the owner in writing of which failure scenario to use in the mapping.

N.H. Code Admin. R. Env-Wr 502.09

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