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17.24.227    SURFACE WATER SETBACK REQUIREMENTS

(1) Dryland opencut mining operations must:  

(a) not affect surface water, including but not limited to, perennial or intermittent streams;

(b) have a permit boundary that is a minimum of 50 feet from the edge of the high water mark of surface water, or as otherwise approved by the department, including but not limited to, perennial or intermittent streams.

(2) Standard opencut mining operations with a permit boundary that is located less than 50 feet from the edge of the high water mark of surface water, including but not limited to perennial or intermittent streams, must follow the Stream/Waterway Worksheet and include specific, detailed design criteria in the application demonstrating:

(a)  a productive postmining land use can be achieved; and

(b) defined channels can be reconnected to undisturbed drainages/waterways in a stable manner to ensure downstream flow is maintained.

(3) Limited opencut operations (LOOs) may not:

(a) affect surface water, including but not limited to, perennial or intermittent streams;

(b) conduct operations within 50 feet of the edge of the high water mark of surface water, including but not limited to, perennial or intermittent streams.

 

History: 82-4-422, MCA; IMP, 82-4-431, 82-4-432, MCA; NEW, 2022 MAR p. 2009, Eff. 10/8/22.

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