2021-02-03_REVISION - M2020008 (4)

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Rifle Gravel P:t 41 January 2021 (amendment to File No. M-2020-008) 4.0 Exhibit C — Pre-Mining and Mining Plan Map(s) of Affected Lands Rule 6.4.3 outlines the requirements for Exhibit C as described below and depicted in Figure 3 through Figure 5. These figures show the total area to be involved in the operation, including the area to be mined, area of affected lands, adjoining surface owners and roads (Figure 3); name and location of all creeks (Figure 4), and the type of present vegetation covering the affected lands (Figures 5 through 8). The Garfield County Road 346 and Interstate 70 EB and WB roadways are the only permanent man-made structures contained on the area of affected land and within two hundred (200) feet of the affected mining land parcel. A copy of the signed Structures Agreement with CDOT is included in Attachment B. Mr. Shideler, owner of the property that the dewatering pipeline will cross, has agreements in place with the structure owners on his property. SCI has requested copies of this documentation from Mr. Shideler, however, nothing has been provided. Exhibit A (Figure 1) depicts the existing topography of the area with contour lines of enough detail to portray the direction and rate of slope of the affected area. Figure 1 also shows that there are no buildings nor power and communication lines on the area of the affected land and within two hundred (200) feet of all boundaries of such area. There is an oil and gas pad adjacent to the southwest of the property within the Robinson Ranch. Exhibit C (Figure 4) contains the water and water resources information and Exhibit I (Figure 16) contains the soils information. Sheets C3 and C4 (Attachment A) also provide details on the dewatering pipeline and depicts the flow path from the Rifle Pit to the Colorado River outfall/discharge point. The Rifle Pit mining operations will re-route the run-on water from the adjacent property and discharge it to the historical location. See Sheet C2 (Attachment A). This is referred to as the Clean Water Diversion channel and allowed under the Construction Stormwater Permit terms to avoid potential contamination of this water from the mining activities. There will not be a need to have a legal easement for this activity. 4.1 Adjoining Surface Landowners Map Information There are four adjoining surface landowners (as depicted in Figure 3). • North —Colorado River Ranch, LLC • West— Rex Robinson Ranch, LLC • South —Colorado Department of Transportation (CDOT) • East—Shidelerosa LLP This information was obtained from the Garfield County Colorado Land Explorer (Garfield County, 2019). 4.2 Topography The existing surface topography is extremely flat and composed of several feet of fine- textured alluvial sediment overlying a highly permeable alluvial aquifer of coarse gravel. The 7