2012-03-12_PERMIT FILE - M2011028

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2.0 INTRODUCTION This Stormwater Management Plan (SWMP) was prepared to be in compliance with the requirements of the Colorado Discharge Permit System (CDPS) General Permit for Stormwater Discharges Associated with Construction Activities (COR- 030000) issued by the Colorado Department of Public Health and Environment ( CDPHE). The General Permit was issued by the CDPHE on May 31, 2007, and expires on June 30, 2012. As a reference, a copy of General Permit (Construction) is included as Appendix A. This plan describes and ensures the implementation of Best Management Practices (BMPs) which will reduce the pollutants in stormwater discharges associated with Four Corners Materials (FCM) construction activities within the property boundaries for the Animas Glacier gravel pit located near Durango, La Plata County, Colorado. After construction activities are complete, FCM intends to file for coverage under the CPDES General Permit for Stormwater Discharges Associated with Sand and Gravel Mining and Processing (COR- 340000) for facility operations. The SWMP will be updated at that time to reflect requirements under that permit. Any changes to site - specific information included in this SWMP will require an amendment that describes the revisions to the description of potential pollutant sources, pollution prevention measures, etc. A copy of this SWMP and all relevant records will be kept for a period of at least three years after production ceases and reclamation is complete. Any amendments will be inserted in Appendix B as a modification to the SWMP. 3.0 SITE DESCRIPTION 3.1 Project Name Animas Glacier Gravel Pit 3.2 Project Operator Oldcastle SW Group, Inc. dba Four Corners Materials Contact: Kyle M. High, General Manager Phone: 970- 247 -2172 Aaron Atkinson, Aggregate Operations Supervisor Field Contact: Cell Phone: 505 - 419 -8493 Animas Glacier SWMP February 2012 p. 2