PERMFILE42028 - Laserfiche WebLink

Home Browse Search

ENVIRONMENT, INC. PAl3E 4 BILOAM STONE ~ BEDROCK MINE M.L.R.B. PERMIT i~ M-97-086 JANUARY 7, 1 998 limits approved. The operator will make sure they stay within the maximum disturbance limits covered by the bond or revise that limit and increase the bond so they are in compliance. Yearly review of the Annual Reports will allow the Division to track the liability and adjust it as needed. (e) Under the plan proposed, it is not possible to present a timetable showing a relationship between 20 acre phases. As I explained above, the location of the area disturbed will not normally be in a single isolated spot but could be broke in two or more areas covering 15 acres total. To give you an idea how long it will take us to develop the mine. It is important to realize that average annual tonnage taken from the mine is 2500 tons (varying from 1000 T to 5000 T). One acre mined to a depth of 10 feet would produce over 30,000 tons. It could therefore take over 2 lifetimes to mine 15.0 ac. This does not give us an accurate idea of how the mine will work but does provide numbers to use when evaluating the impacts the mine will have on wildlife and surface drainage. It also points out why we need a lot of flexibil- ity when mining the site and why breaking the 329.29 acres area into multiple small phases is impractical. (f) The typical sketch I prepared shows the possible location of the topsoil piles in relation to the disturbed area. How that relates to the total area is not easy to define as we are not sure at this time where the slab rock mining areas will be. A topsoil depth of 20 feet is not the normal depth and is an exception to the rule. As a slab rock area is opened there will be no soil or overburden on the exposed rock, so using an average of 10 feet to calculate the bond amount is not out of line. During the "Life of the Mine" the bond will be reviewed numerous times and can be adjusted as needed if the amount of sloping depth increase. If we use the current area being mined, the maximum depth of the overburden will be about 11 feet. 6.4.5 Exhibit E -Reclamation Plan Common since should prevail here. Considering the estimated amount of average production, wildlife will be minimally af- fected. Replacing trees was not deemed necessary since the mine will develop slowly and natural invasion of woody plants, as all ready experienced, will occur. We will commit to helping this natural invasion by spreading Juniper and Pinon Pine seeds when the grass is planted. I discuss our tree planting plan under (f)(iv) below. There will be some disruption of surface drainage in the immediate area of active mining, but that can be handled as development progresses. If and when the entire area is mined the site could be lowered 15 feet overall, and drainage on the site will have to be directed into the existing canyons so the his- toric flows will remain. A simple way to do this would be to daylight out the canyon side so only slopes would exist on the