Administrative Rules of Montana
Department 17 - ENVIRONMENTAL QUALITY
Chapter 17.24 - RECLAMATION
Subchapter 17.24.6 - Strip and Underground Mine Reclamation Act: Transportation Facilities, Use of Explosives, and Hydrology
Rule 17.24.635 - GENERAL REQUIREMENTS FOR TEMPORARY AND PERMANENT DIVERSION OF OVERLAND FLOW, THROUGH FLOW, SHALLOW GROUND WATER FLOW, EPHEMERAL DRAINAGEWAYS, AND INTERMITTENT AND PERENNIAL STREAMS
Current through Register Vol. 6, March 22, 2024
(1) The department may require or approve a diversion of flow whenever:
(2) A diversion that increases the potential for landslides or allows entry of diverted water into underground mines must not be created.
(3) Diversions must not be constructed to pass large flow events into an adjacent drainage channel that would result in excessive erosion in the natural channel. Water in excess of the design event must be conveyed in a stable manner to an appropriate treatment facility to meet effluent limitations before passing off the permit area.
(4)
(5) The design and construction of all stream channel diversions and any related structures must be certified by a qualified licensed professional engineer as meeting the performance standards and any design criteria set by the department.
AUTH: 82-4-205, MCA; IMP: 82-4-231, MCA