PERMFILE113581

• Permit No: M1997089
• IBM Index Class Name: Permit File
• Doc Date: 1/28/1998
• Doc Name: RATIONALE FOR APPROVAL RECOMMENDATION REGULAR 112 CONSTRUCTION MATERIALS APPLICATION DAREN STONE
• Media Type: D
• Archive: No

Rationale for Approval Recommendation Page 8
Application for Stone Gravel Pit
Permit No. M-97-089
location will be surrounded by spill containment berm of sufficient capacity to ensure
containment of 1 50% of the stored fluids and lined with 80 mil impermeable liner;
Commitment to not utilize any acid forming chemicals and not produce or expose any toxic
chemicals or substances;
Reconstruction of stable intermittent drainage channel to convey upland drainage through
affected and reclaimed areas; and
Utilization of 2 tons/acre mulch for reclaimed areas to reduce speed and volume of runoff,
control erosion and encourage establishment of vegetative cover.
Response - 6.h., i., j., and k. -Application indicates that water, necessary to support
project requirements, shall be purchased from off-site water sources. Application indicates
that approximately 10,000 gpd may be necessary to support crushing operation and up to
50,000 gpd for dust suppression, total water consumption is estimated at 60,000 gpd
during active crushing operations.
Response - 6.c, and I. -Applicant has indicated that groundwater was not encountered in
the exploration test pits excavated to 12' depths throughout the proposed site. Applicant
has indicated that evidence of groundwater exposure is absent for the un-reclaimed
excavations located in the immediate area and which were excavated to similar depths.
Additionally, comment received from Office of State Engineer, Division of Water
Resources, has not indicated potential conflict with groundwater issues. DMG review of
the application has not identified potential adverse impacts to performance of private wells.
Response - 6.c. -BLM is the surface management agency, has reviewed the application,
and has completed an Environmental Analysis for the proposed operation. BLM
Environmental Analysis states:
"Water Quality, Surface or Ground: From the description of the mining plan submitted by Mr.
Stone, no impacts to water quality would be expected. The general slope of the site is around
3%. However, possible silt and turbidity from thunder showers to areas immediately adjacent
and downstream of the mining operation could cause minimal impacts to public and private
land. It may be prudent to place berms or dams in small intermittent drainages downstream
from mining operation areas (including stockpiling areas) to protect from local surface runoff
effects. Since these drainages are essentially headwater, the area drained is relatively small."
7. Exhibit H -- Wi/dlife /nformation -- is inadequate tBel% MPC, Stills)
a. Meaningful description of wildlife resources is absent /stills)
b. Description of operations effect to wildlife is absent (Stills!
c. Location provides winter range and migration route for deer and Mtn. lion /Srllisl
d. Description of effect to wildlife from increased human activity, including noise and traffic from
material haul trucks and water trucks is absent /Stills!
e. Effect on listed threatened and endangered species not addressed /Brats/