2021-10-29_PERMIT FILE - M2021064 ‎(6)‎

• Permit No: M2021064
• IBM Index Class Name: Permit File
• Doc Date: 10/29/2021
• Doc Name: Application
• From: C & J Gravel Products, Inc
• To: DRMS
• Email Name: LJW
• Email Name: THM
• Media Type: D
• Archive: No

COMPLIANCE WITH RECLAMATION STANDARDS (6.4.5.(2)c.)
The following is provided in demonstration of compliance with state standards(Rule 3.1). Please refer to Exhibit F.
Grading (3.1.50))and Backfilling(3.1.5(2))
(This plan is based on an average depth of extraction of 23 feet: 3 feet of soil/overburden(to be replaced)and 20
feet of actual removal, resulting in a 20-foot reduction in post-reclamation elevations as compared to pre-mining
surface elevations. Some long natural slopes are as steep as 2H:1V. Actual depth of backfill may vary. Slope
widths and heights will vary from area to area based on total depth of mining accomplished. All final slopes of
21­1:1 V or flatter will be covered with stockpiled soil.)
Until nearing the outer edge, most active mining faces will be vertical. All working faces will have soil stripped at
least 10 feet to the rear of the face. Excess fines may also be stored in stockpiles on the final floor of the pit, until
placed in final reclamation areas for backfill. All backfill will be placed as engineered fill and compacted to
approximately 75%Proctor density or better, as field-determined. Exterior(perimeter)faces of pits will be mined
at a taper, backfilled,or left sufficiently distant from the permit boundary or buffer zone boundary to cut and fill to
2H:1 V slope or flatter, OR where adjacent natural slopes are steeper than 21­1:1 V,to match adjacent slopes within
20%+/-. On the eastern permit boundary, at the edge of the total affected area, efforts will be made to provide a
slope matching the adjacent off-site terrain but ensuring that surface water infiltrates into undisturbed permeable
material and has no surface discharge with less than 100-year-frequency storm events. There are some areas,
which may be left at a permanent steeper slope of 1 V:1 H or vertical, based on exposed basement rock conditions
as evaluated by an engineer at the time of mining, and stabilized as necessary. See cross-sections in Exhibit F.
Grading to control erosion, siltation and prevent damage(3.1.5(3))
Grade the surface so that erosion and sediment is controlled on affected land and so that there is no damage to
unaffected land. Eliminate all highwalls(mining faces)except as noted above. Where highwalls of 1V:1H or
steeper(vertical)are left, use temporary and permanent storm water management and erosion control features
on the uphill side as part of stabilization and reclamation. Locate any slopes steeper than 21­1:1 V at least 50 feet
from all exterior property boundaries and a horizontal distance equal to or greater than the height of the cut slope
and any natural change in elevation between the back of the cut slope and the permit boundary.This prevents
off-property damage due to slope failure, and prevents potential slides or other damage on affected lands or
outside the permit boundary. No mining,disturbance,or reclamation is planned within delineated wetlands or
floodplains. No surface discharge is planned; all precipitation either infiltrates or evaporates. If unanticipated
conditions determine that surface discharge of water is necessary,employ detention basins, outfall armoring,
and other techniques to prevent discharge of sediment and siltation off-site.
Performance as soon as feasible(3.1.5(4))
For most of the affected area,the time between initial disturbance and final reclamation will be approximately two-
three years. Because of the size and the post-reclamation uses,the time to meet reclamation standards will vary.
Internal roads across areas already backfilled and put at final grade which are needed for areas to be minded in
the future will not have soil replaced immediately.The plant and stockpile area,expanded around the pre-mining
areas, will not be reclaimed until all planned excavation, processing, and shipment of materials is completed, at
the end of the project. Backfilling, grading, and placement of soil should be accomplished within one year of
completion of extraction of construction materials, with seeding to follow as soon as possible based on
recommendations, seasons, and weather conditions (See Exhibit J). Again, a portion of the site (estimated total
5.5 acres)will not have overburden or soil placed as part of reclamation to leave this area for ranch operations in
the future.Some areas used for haul and access roads and storm water controls will not be immediately reclaimed.
Refuse and acid-forming or toxic producing materials(3.1.5(5))
There is no reason to believe that toxic or acid-forming,or toxic producing materials are found or will be brought
on site. Therefore no special action is necessary to prevent leaching, protect the drainage system, or prevent
unauthorized release of pollutants to surface water or groundwater, beyond that necessary for erosion control
and prevention and control of spills and leaks from vehicles and equipment. Fines will be almost immediately
moved to final locations for final reclamation surfaces and slopes. Normal municipal solid waste generated
during operations will be hauled off-site for disposal at permitted solid waste facilities and will not be buried or
burned on-site. There will be some use of various wastes, including wood waste(sawdust, bark,similar
C&J Gravel Products, Inc. Page 21 of 93 20 OCT 2021
Application for Permit: Oakbrush Hill Gravel M-2021- C&J-DPR-V5-001