2015-06-04_REVISION - M1977376 (6)

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6.4.4 EXHIBIT D — MINING PLAN Introduction The mining on this quarry site started in late 1920's. The first area mined is the Old Quarry area (see Detail 3 on Exh. C-1). The second area mined is the present mining area (see Detail 2 on Exh. C-1). The dolomite limestone was used by CFI in Pueblo for steel manufacturing. CFI permitted the quarry in 1977 when the reclamation law was implemented. The land of the permit was purchased by private investor in 1993. The land was purchased by Continental Materials in 2003. Thus Continental Materials is liable for reclamation of disturbances since 1977. Exh C1 defines this area. Any disturbance not inside the dashed line is not the responsibility of the operator. Much of the disturbance in the mine area (Detail 2, Exh C-1) will be incorporated into the future mining area. The last amendment done in 1982 by CFI included a vague mining and reclamation plan. Thus the purpose of this TR is to detail the plans and update the financial warranty. There is no change in permit boundary. (a) Methods of Mining This is a hard rock quarry on a mountain side. The standard benching technique moving downward on the hill will be employed. Refer to Exh. C-2. Prior to 1977, the original operator started mining up the slope at the western boundary line. The present mining is occurring 300 to 600 feet from the boundary line. The operator will continue the present mining on the 6190 foot bench. One bench above the mining is used as the road up to drill / blast area. The blasting cuts out approximately 50' of horizontal distance once a year. The rock material is used for landscape purposes. The present bench for mining (approx. 6150' elev) slopes upward to the south. This presents a problem as rainfall drainage flows northward back into crusher/screen and stockpile area. Mining of the remaining bench and the next (third) bench will bring the benches to horizontal. Thus rainfall drainage can be directed to the east and off the bench. Mining will proceed down to the east to 6000 elev. Seven benches in total will be mined. Approximately 1.2 M tons are mined out per bench. No mining will occur any farther into the canyons of Echo and Diablo as noted in 1982 amendment.