2015-06-04_REVISION - M1977376 (6)

Home Browse Search

The portable crusher and screen plant moves with mining face. Product stockpiles are located to north of the plant. After blasting, rock is picked up by loader and taken to the hopper of the crusher. The screen plant sorts rock material into desirable sizes and belt stackers move the rock into stockpiles. (a) Earthmoving With very little overburden on top of the dolomite and mining occurring on land previously disturbed, there is no earthmoving or stockpiling. (b) Water diversions and impoundments No groundwater is encountered in mining. No impoundments are built to catch rainfall. No drainages are diverted. (c.) Timetable Mining production now is approximately 50,000 tpy. We forecast that production will increase in the future as the market area grows. Up to 300,000 tpy could be mined in later stages of the operation. Each bench involves 15 to 20 acres. Refer to Section B -B on Exh. C-2 for bench locations. This mining operation may have perils of inactivity exceeding 180 days. This may occur in the fall and winter when landscaping is usually not installed and if rock stockpiles at the sales yard in Pueblo West are full. This statement serves as the substitute for Notice of Temporary Cessation. The following timetable shows possible bench mining. - ®_________ ' _®M_______ - ___®®_____ MM (f) Dolomite is a carbonate mineral made of calcium magnesium carbonate' instead of pure calcium carbonate material. Therefore, dolomite is called a double carbonate rock, and it doesn't readily dissolve in dilute acidic media. The way dolomite is formed is not quite clear, and it has been found to form under high saline conditions in environments like lagoons. Dolomite is also a sedimentary rock type. When dolomite is formed, several steps of dissolution and re - precipitation is passed where the structure of the mineral is modified into more stable forms and crystallizes in a trigonal-rhombohedral manner.