Current through Register Vol. 54, No. 36, September 7, 2024
Section 77.461 - Dams, ponds, embankments and impoundments(a) An application shall contain a general plan and a design plan in the detail required by the Department for each temporary and permanent dam, pond, embankment or impoundment within the proposed permit area.(b) The general plan shall contain the following: (1) A description, map and cross section of the structure and its location.(2) Preliminary hydrologic and geologic information required to assess the hydrologic impact of the structure if requested by the Department.(3) A survey describing the potential effect on the structure from subsidence of the subsurface strata resulting from past underground mining operations if underground mining has occurred.(c) The design plan for a structure shall: (1) Be prepared by, or under the direction of, and certified by a registered professional engineer or registered professional land surveyor.(2) Include design and construction requirements for each structure, including geotechnical information if requested by the Department.(3) Describe the operation and maintenance requirements for each structure.(4) Describe the timetable and plans to remove each structure, if appropriate.(5) Include a stability analysis if the structure is more than 15 feet (4.6 meters) in height as measured from the upstream toe of the embankment to the crest of the emergency spillway or has a storage volume of more than 50 acre feet (61.7 cubic meters).(d) The design plan of sedimentation ponds shall include the information required by § 77.527 (relating to sedimentation controls).The provisions of this §77.461 adopted March 16, 1990, effective 3/17/1990, 20 Pa.B. 1643; amended January 30, 1998, effective 1/31/1998, 28 Pa.B. 619.