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Exhibit J Skull Creek Sand Project <br /> Project Area Description <br /> The Skull Creek Sand Project is located approximately 2.7 miles NW of Massadona, CO on State <br /> Lands. The Project Boundary encompasses approximately 484.6 acres of which there will be <br /> approximately 144.6 acres of disturbance due to mining activities. Elevations of the Project <br /> Boundary vary from 5,665 ft to 6,040 ft. <br /> The Skull Creek Sand Project will extract Dakota Sandstone 'frac sand' by open pit methods and <br /> ship from the project site (or 'East Block') to a sand plant in Eastern Utah for processing and <br /> sale to the end user. The Dakota Sandstone in the vicinity of the project is contained in a <br /> stratigraphic series of shales and sandstones including the Cedar Mountain, Dakota, Mowry, <br /> Mancos, Frontier and Mancos Formations from bottom to top. The Cedar Mountain Formation <br /> forms the underburden or floor for the project and consists of shales and can contain numerous <br /> fossils. These strata are steeply dipping (-50 degrees) with the sandstone units forming less- <br /> erodible ridges and outcrops between the shale units. A fair portion (up to 40+ vertical feet) of <br /> the Dakota is exposed at the surface on the northern extent of the planned pits, with <br /> interbedded shale and sandstones present as overburden to the south of this ridge (See Figure <br /> D-1 below). Mining of the Dakota will begin with the exposed ridge and continue to a depth of <br /> approximately 200 feet or a limiting strip ratio of approximately 2.5:1. <br /> The pre-mining topography of the project area is shown on Map C-3, while Map C-4 shows the <br /> approximate extents of the expected Affected Lands. Maps C-5 to C-7 provide Dakota <br /> sandstone thickness and overburden thickness isopachs as well as a strip ratio isopach. <br /> Figure D-1. Typical arrangement of Strata and Ridges in vicinity of Skull Creek Project. <br /> {S <br /> Y '" <br /> 4 - <br /> lr ` +.+ <br /> ' j -a <br /> f y I 1. �;•• - , ♦, <br /> 1141 <br /> 7 <br /> 12/23/19 <br />