2019-04-18_PERMIT FILE - M2019001

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Mr. Peter Hays RE:Lazy Two Pit M-2019-001 April 17, 2019 groundwater elevation and a well permit and approved augmentation plan will be obtained from Colorado Division of Water Resources before groundwater is exposed. Test pits were excavated on the property to evaluate the depth and spatial extent of the gravel reserve. The test pits were excavated several feet below the identified gravel reserve and no groundwater was exposed in any of the pits. Where available, construction reports from domestic wells near the site were also evaluated (available well construction reports attached). Information from the reports is provided in the table below. Although the wells on the Mellott property did not have available construction reports, the static water level in the wells was estimated by the property owner. Well Location Approximate Well Location Estimated Static Water Level (Property) (from Lazy Two Pit) (feet below ground surface) Ross On-site unknown Burris 600 feet SW 72 JEM Ranch 1400 feet west 21 Thomas Ranch 3000 feet north 75 Maclean 800 feet east unknown Indian Creek Ranch 2000 feet west 78 Whitfield 1800 feet south 22 Mellott 500 feet south 75 It is difficult to spatially compare groundwater elevations using depth to water since ground surface elevations vary between well locations. However, some general inferences can be made from the available data. Based on the available information, as described below, it would be reasonable to assume that groundwater beneath the Lazy Two Pit site could range from as shallow as 20 feet to as deep as 50 feet below the ground surface. These estimates place the normal groundwater elevation at least 10 feet below the estimated pit depth. Additionally, from the well construction reports with available bore logs, it appears that water was not encountered in the upper sand and gravel materials, but in deeper shale and sandstone formations. The Lazy Two Pit property is generally lower than properties to the east and west of the proposed mining site. This means that although depth to water in some adjacent property wells may be about 75 below the surface, ground elevations where wells are located east and west of the site (Burris, Thomas Ranch, Indian Creek Ranch) could be as much as 20 to 40 feet higher than the Lazy Two Pit ground surface. Wells in the region with shallower depth to water measurements (JEM Ranch, Whitfield) appear to be at elevations more similar to the Lazy Two Pit ground surface elevation,but these wells are also located adjacent to the Spring Creek drainage— a northwest to southeast running drainage located west and south of the site where higher groundwater elevations would be expected. Although the Mellott well is at a similar ground surface elevation as the Lazy Two Pit site and the static depth to water was estimated at 75 feet, there are no records documenting the measurement and the accuracy could be suspect. .4- t b U e e Q(-t h Page 4 of 6