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Exhibit D <br /> Mining Plan <br /> CONFIDENTIAL <br /> Topographically mining and processing will occur at leastsfeet below the ground surface (with the <br /> exception of temporary stripping activities where excavators, dozers, and trucks will be above the buffer <br /> on occasion). Due to these buffers, a vegetated safety berm or fencing will be placed around all open <br /> excavations/property lines in lieu of landscaping improvements. Signage will be limited to speed limit <br /> signs in the pit, operational signs at the entrance, and miscellaneous safety and operational signs. All of <br /> these signs will be at a height no greater than 8 feet and generally 24" x 18" in size, without any lighting <br /> or illumination. One to two dumpsters will be placed near the plant areas and/or the scalehouse, along <br /> with portable toilets to serve the appropriate number of employees and customers at any given time. <br /> The proposed general location of many of these improvements is shown in the Mining Plan. <br /> All mining activities will occur at a minimum of 30 feet above the Colorado River,developing an alluvial <br /> cobble and sand surface deposit above a shale layer. Mining operations will consist of stripping the <br /> upper layer of topsoil where available, which can vary from 0 to 3 inches, and stockpiling in the mining <br /> area for future reclamation. Overburden will also be stripped periodically, and stockpiled on site for <br /> sales and reclamation. Stripping will occur with either an excavator, haul and/or dump trucks, scrapers <br /> and/or dozers. Aggregate material will be mined from the surface to a depth of approximately i feet <br /> or greater depending on the depth of the deposit,typically utilizing wheel loaders as the crusher will be <br /> relocated periodically to be near the bank, but also possibly with excavators, dozers, and haul or dump <br /> trucks if conditions warrant. The actual mining depth will depend on the elevation of the underlaying <br /> shale layer. A minimum of 2 feet of free draining raw material will be left or replaced above the shale <br /> layer. Crushers and plants will typically be situated on pit floor at least below existing surfaces. <br /> Processed material including sand,gravel, and decorative rock will be sold for civil construction projects, <br /> including but not limited to roads, structures, landscaping, bridges, asphalt and concrete projects. <br /> There will not be any incidental products produced in the operation. <br /> Total disturbed area will not exceed 40 acres at any given time. <br /> As an ancillary operation, material will be imported from time to time from outlying locations and <br /> construction jobs. This material may be reprocessed, utilized in reclamation operations, and possibly <br /> resold. This part of the operation is essential to the growing demand for recycle materials as part of <br /> green and LEED projects. <br /> The proposed development schedule will be as follows, which is an estimate only and subject to market <br /> conditions: <br /> a. Phase 1 Area 2017-2021 <br /> b. Phase 2 Area 2022-2027 <br /> c. Phase 3 Area 2028-2041 <br /> d. Phase 4 Area 2042-2047 <br /> Mining activities will not create any water diversions or impoundments. <br /> Explosives will not be utilized in operations. <br /> 11Page <br />