2012-09-06_REVISION - M2008070 (25)

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Design and Operations Plan Western Gravel E & P Waste Disposal Facility Any questions or comments regarding the DOP that CDPHE and/or Rio Blanco County BOCC may have can be referred to NWCC at (970) 879 -7888. 1.2 GENERAL INFORMATION A COD and SUP are being requested for an approximately 57.4 -acre area including WG current Phase 1 gravel mining and aggregate processing operations and an adjacent area west and southeast of Phase 1. The proposed E &P waste disposal facility will be owned by WG and operated by employees of WG. Landowner, business owner, and operator information is summarized below. Name: Western Gravel, LLC Attention: Don Valentine — Managing Partner Mailing Address: P.O. Box 881090 Steamboat Springs, Colorado 80488 Physical Address: 41138 County Road 5, Rio Blanco County, Colorado Telephone: (970)846 -6040 Facsimile: (970)879 -0799 Facility: (970) 878 -5097 Email Address: Valentine383 @AOL.com The facility is located approximately 17 miles west - northwest of the Town of Meeker and 38 miles east of Rangely, Colorado. Facility access is directly east of Rio Blanco County Road (RBCR) 5. RBCR 5 is also known as Piceance Creek Road. To travel to the site from Meeker, travel south on Highway 13, travel west on Highway 64, travel south on RBCR 5, cross the White River bridge, and take the first left turn arriving at the WG gated entrance and scale house. A private, two lane gravel access road leads to Phase 1 and the proposed WGDF fill area. The fill area is approximately 1 1/2 miles from the scale house and facility entrance. The approximate facility location is shown on Figure 1 and the WG facility plan is shown on Figure 2. WGDF details and adjacent properties are shown on Figure 3. The facility property and COD boundaries are shown on both Figures 2 and 3. The WGDF requested COD includes approximately 57.4 acres located in parts of Tracts 38, 39, and 41 of Township 1 North, Range 96 West in Rio Blanco County, Colorado. Of the 57.4 acres, approximately 10 acres will remain undisturbed. Total landfill cell area is approximately 14 acres and site improvements (e.g. access roads) are approximately 33 acres. Although the COD will be for the entire 57.4 acres, actual filling of proposed cells will be conducted in a phased approach managed by Rio Blanco County through SUP conditions. A total of five cells (Cells A through E) including two stormwater retention ponds are proposed. Initially, only Cell A and Pond 1 will be constructed as Phase 1. Phase 2 will include Cell B and a stormwater retention pond, Phase 3 will include Cell C, Phase 4 Cell E and Phase 5 Cell D. It should be noted that an area within the COD and to the west of Cell A is included as part of Phase 1 in order to provide a staging and equipment logistics area. Prior to initiating each subsequent filling phase, an SUP amendment by Rio Blanco County must be requested and approved allowing further cell development. Filling phase sequencing is illustrated on Figure 3A and the legal description of Phase 1 is included in Appendix A. In general, cells will be constructed, filled, and closed as mining proceeds and based upon energy industry waste disposal needs. The estimated waste capacity at build out is approximately 397,000 cubic yards (cy). Including daily and interim cover, the total capacity will be approximately 467,000 cy. Based upon an anticipated waste acceptance rate of 46,800 cy per year and an estimated facility waste capacity of 397,000 cy, it is estimated that the facility will provide approximately 8.5 years of E &P and PCS waste disposal life. Based upon Rio Blanco County (RBC) records, the facility is currently zoned for agricultural use. The facility location is consistent with current area uses including heavy commercial use (e.g. gravel mining and aggregate processing). Several commercial businesses (e.g. gravel mining and aggregate processing, production water transportation) are located in the immediate vicinity west of the WG scale house and along RBCR 5. Other NWCC, Inc. October 24, 2011 Page 2 of 51