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• <br /> <br />The depth of the overburden averages 15 feet. The top 4 to 6 inches of the overburden will be <br />saved and stockpiled for reclamation. The sand and gravel deposit averages 20 feet. The tmderly- <br />ing material is Mancos Shale. <br />The primary product to be mined is sand and gravel. A secondary product may be overburden. <br />The sand and gravel will be used for construction aggregates for road construction, pipe bedding <br />and concrete. Overburden may be used for embankment material. <br />