General Definitions

  • Accelerated Erosion – The removal of the surface of the land through the combined action of human activities and natural processes, at a rate greater than would occur because of the natural process alone.

  • Best Management Practices (BMPs) - Activities, facilities, and measures, or procedures used to minimize accelerated erosion and sedimentation to protect, maintain, reclaim and restore the quality of waters and the existing and designated uses of waters within the Commonwealth.

  • Disturbed Area - Unstabilized land area where earth disturbance activity is occurring or has occurred.

  • Earth Disturbance Activity - A construction or other human activity which disturbs the surface of the land, including, but not limited to, clearing & grubbing, grading, excavations, embankments, land development, agricultural plowing or tilling, timber harvesting activities, road maintenance activities, mineral extraction, and the moving, depositing, stockpiling, or storing of soil, rock or other earth materials.

  • Erosion - The natural process by which the surface of the land is worn away by water, wind, or chemical action.

  • Erosion and Sediment Pollution Control Plan - A site specific plan identifying BMPs to minimize accelerated erosion and sedimentation. For agricultural plowing or tilling activities, the erosion and sediment pollution control plan is that portion of a conservation plan identifying BMPs to minimize erosion.

  • National Pollutant Discharge Elimination System (NPDES) - The National system for the issuance of permits under section 402 of the Federal Clean Water Act including a state or interstate program which has been approved in whole or in part by the Environmental Protection Agency.

  • Post-Construction Stormwater Management Plan – A site specific plan identifying stormwater management BMPs that improve water quality as well as reduce stormwater volume and rate.

  • Sediment - Soils or other materials transported by surface water as a product of erosion.

  • Surface Waters of the Commonwealth- Any and all rivers, streams, creeks, rivulets, impoundments, ditches, watercourses, storm sewers, lakes, dammed water, ponds, springs, wetlands and other bodies or channels of conveyance of surface water, or parts thereof, whether natural or artificial, within or on the boundaries of this Commonwealth (Pennsylvania).

  • Waters of The Commonwealth - Rivers, streams, creeks, rivulets, impoundments, ditches, watercourses, storm sewers, lakes, dammed water, wetlands, ponds, springs and other bodies or channels of conveyance of surface and underground water, or parts thereof, weather natural or artificial, within or on the boundaries of this commonwealth (Pennsylvania).



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