_PERMIT FILE - M2000144

• Permit No: M2000144
• IBM Index Class Name: Permit File
• Doc Name: 112 Permit Application
• From: Hall-Irwin Corporation
• To: DMG
• Media Type: D
• Archive: No

EXHIBIT D — MINING PLAN
Proposed Mining Process for Each Section
Before any mining commences, the operator will install a dewatering trench around the mining area.
This water will be pumped into an existing pond on the La Poudre site in accordance with the
discharge permit from the Colorado Department of Public Health and the Environment(CDPHE).
After the section is dewatered, scrapers will strip the topsoil and the overburden and use it to create
berms around the section. When the alluvium is sufficiently dry, an excavator will place the gravel
in haul trucks which will transport the material to the processing area on the La Poudre site. As
mining proceeds towards the center of the section, overburden will placed along the edges to create
the shoreline of the future pond. Topsoil will be placed on finished slopes and the area will be
seeded. After the mining has been completed, the dewatering trench will be extended to include the
next section to be mined and the process will begin again. Undisturbed areas will be managed as
dryland pasture until mining commences.
Earihmoving
The sand and gravel will be excavated and loaded into haul trucks which will transport the material
to the processing area at the adjacent La Poudre Pit (southwest of this site).
Water diversions and impoundments
The perimeter of the pond will be dewatered by digging a trench below the resource to be mined.
The water will pumped into a pond on the adjacent La Poudre Pit.
Sire of the area to be worked at an-v one time
The site will be mined in two phases, beginning on the eastern edge of the property and proceeding
west. Each phase will be less than 20 acres. Refer to the Mining Plan Map for details.
Timetable for mining
The site will be mined in two phases, beginning on the eastern edge of the property and proceeding
west. Minins and reclamation will proceed concurrently. Hall-Irwin anticipates production will
range from 300,000 to 500,000 tons per year. With approximately 1.2 million tons of material at this
site, it will likely take 18 to 30 months to mine and reclaim each phase. The total life of the mining
operation may exceed 5 years however, if the demand for construction materials slows in the future.
Nature, depth and thickness of the commodity to be mined e
Refer to Exhibit I — Soils Information for boring logs and the Mining Plan Map for boring locationsh
Primary and secondart,commodities to be extracted
The primary commodity to be mined is sand and gravel. The anticipated end use is construction
materials. There are no anticipated secondary or incidental commodities.
NORTH LA POUDRE RESOURCE Page-14-