11 MAC Pt. 7, R. 3.6
Inspections, Breach Analysis, and Emergency Action Plans
Cite as 11 Miss. Admin. Code Pt. 7, R. 3.6
Inspections, Breach Analysis, and Emergency Action Plans.
A.
The owner and the operator of a dam shall be responsible for the proper operation and
maintenance as well as the structural integrity of the dam. In order to fulfill this
responsibility, the owner and/or the operator should perform a visual inspection of the
dam at least every sixty (60) days and after every major rainfall event over the watershed.
Any significant deficiencies observed during such visual inspections shall be
immediately reported to MDEQ.
B.
The owner or operator of a high hazard or significant hazard dam shall have a detailed
formal inspection of the dam performed by a registered professional engineer with
experience in the design and construction of dams at such recurring intervals as may be
directed by MDEQ. In addition, annual ownerโs inspections of the dam submitted by the
owner may also be required. A checklist form prescribed and furnished by MDEQ shall
be used to record observations during the inspection. Inspection reports shall be
submitted to MDEQ no later than sixty (60) days after completion.
C.
The owners or operators of high hazard or significant hazard dams shall maintain records
and documents related to the original construction, recurring inspections, maintenance,
repairs, and alterations of the dam for the life of the project. Such records shall be made
available for inspection, or copies of such records furnished, upon request by MDEQ.
D.
Dam breach analysis may be required by MDEQ to evaluate the hazard potential
classification of a dam. For hazard classification purposes, the breach analysis is
typically performed as a sunny day top of dam failure. MDEQ at its discretion may
also require additional scenarios in certain circumstances.
The breach analysis shall extend downstream of the dam to a point where the depth of
flooding outside the channel is no greater than 2 feet. All breach analysis models shall
be digitally submitted to MDEQ.
E.
The owner or operator of a high hazard dam shall develop an Emergency Action Plan
(EAP) for the dam. MDEQ at its discretion may also direct the owner or operator of a
significant hazard dam to develop an Emergency Action Plan (EAP). The EAP shall be
submitted to MDEQ for approval. Once approved, a copy of the EAP will be
maintained on file by MDEQ. The owner or operator of the dam shall review the EAP
on an annual basis to assure that the information contained therein is current. Revisions
to the EAP, as necessary, shall be furnished to MDEQ and all other persons involved in
the implementation of the EAP. The owner or operator also shall be responsible for
conducting or coordinating periodic training and exercises to assure that personnel
involved in the implementation of the EAP are properly prepared to carry out their
responsibilities in the event of an emergency.
F.
MDEQ employees are authorized to make inspections at any time to evaluate the
operation, maintenance, and structural integrity of dams and reservoirs. The owner or
operator shall be required to perform, at the owner's or operator's expense, such work as
may be necessary to correct deficiencies in maintenance and operation or accomplish
necessary repairs identified by such inspections. If deficiencies are not corrected or
repairs are not made as specified in the inspection report, the Commission may order
owners or operators to take remedial action or remove the dam in order to safeguard lives
and property.