Wis. Admin. Code Department of Natural Resources NR 333.06 - Dam hazard ratings
(1) A hazard rating of low, significant or
high for all existing and proposed dams shall be determined in accordance with
the following criteria:
(a)
Low
hazard. A low hazard rating shall be assigned to those dams that have
no development unrelated to allowable open space use in the hydraulic shadow
where the failure or mis-operation of the dam would result in no probable loss
of human life, low economic losses (losses are principally limited to the
owners property), low environmental damage, no significant disruption of
lifeline facilities, and have land use controls in place to restrict future
development in the hydraulic shadow.
(b)
Significant hazard. A
significant hazard rating shall be assigned to those dams that have no existing
development in the hydraulic shadow that would be inundated to a depth greater
than 2 feet and have land use controls in place to restrict future development
in the hydraulic shadow. Potential for loss of human life during failure must
be unlikely. Failure or mis-operation of the dam would result in no probable
loss of human life but can cause economic loss, environmental damage, or
disruption of lifeline facilities.
(c)
High hazard. A high
hazard rating shall be assigned to those dams that have existing development in
the hydraulic shadow that will be inundated to a depth greater than 2 feet or
do not have land use controls in place to restrict future development in the
hydraulic shadow. This rating must be assigned if loss of human life during
failure or mis-operation of the dam is probable.
(2) The owner of a dam may request that the
department change the hazard rating of an existing or proposed dam by
submitting adequate information which demonstrates that the land use and land
use controls downstream from the dam meet the requirements for a different
hazard rating. The department shall advise the owner of its action on the
requested change within 90 business days after receiving the request.
Notes
State regulations are updated quarterly; we currently have two versions available. Below is a comparison between our most recent version and the prior quarterly release. More comparison features will be added as we have more versions to compare.
No prior version found.