2020-08-09_PERMIT FILE - M2020041

• Permit No: M2020041
• IBM Index Class Name: Permit File
• Doc Date: 8/9/2020
• Doc Name: Application
• From: Kilgore Companies
• To: DRMS
• Email Name: ECS
• Email Name: MAC
• Media Type: D
• Archive: No

Peak Ranch Resource
August 5, 2020
All material mined from Phase 1 will be dry mined using loaders and dozers. The material mined from Phase
1 areas will be loaded onto haul trucks and taken to Maryland Creek Ranch. The excavation site will then be
regraded in preparation for replacing the overburden and topsoil.
2.2 Phase 2 Mining Plan (depicted on Exhibit C, Sheet C-213)
A dragline or similar piece of equipment will be used to wet mine Phase 2. Phase 2 will be mined as shown on
Exhibit C, Sheet C-2B. Phase 2 will expose groundwater as it mines into the floor of Phase 1 South.As the
dragline excavates the material, it will be placed on the bank of the groundwater lake above the water table to
drain prior to being loaded by the front-end loader into highway haul trucks for transportation to Maryland
Creek Ranch. The material placed next to the dragline will remain in this location only for the time it takes to
dewater. Operations will continue until the ultimate depth or final grade of the mine is reached; at which time
all excavation will cease. The entire footprint of Phase 2 mining is entirely contained within the Phase 1 South
footprint. No new horizontal disturbance will be created by Phase 2.
2.3 Mining Buffers and Limitations
During both Phase 1 and Phase 2, the following criteria will apply to the operation:
• No disturbance will occur within the Federal Emergency Management Agency(FEMA) designated
100-year flood plain.
• There will be a minimum 200-foot buffer between the mining area and the Blue River.
• There will be a 25-foot buffer between the mining area and the wetland located in the northeast
quadrant of the permit area.
• A minimum of 100-foot setbacks will be maintained between the edge of mining and the property lines
to the north and south.
• A minimum of 50-foot setbacks will be maintained between the edge of mining and the property lines
to the west and east.
• No mining will take place within the drainage easement that bisects the site.
• No blasting will be conducted.
• No processing will take place on-site.
• All out-of-priority water depletions will be replaced pursuant to an approved SWSP or augmentation
plan.
• The site will not be dewatered; Phase 2 will be wet mined.
• All resource material extracted from the site will be loaded onto on-highway haul dump trucks and
transported to the Maryland Creek Ranch facility for processing.
• No office buildings will be on-site.
3.0 OVERBURDEN AND TOPSOIL HANDLING
Initial earthmoving will consist of stripping up to 6 inches of topsoil and 6-12 inches of overburden from areas
to be disturbed. These stripping thicknesses are based on the soil survey for the operation. For the purpose of
the material balance,the maximum thicknesses are assumed. All earthmoving will be done using mining
equipment suitable for this type operation including the following:front end loader, dozer, excavator, dragline,
and water trucks. Topsoil and overburden will be direct placed, as much as possible,with stockpiling as
needed in the designated stockpile area (Exhibit C, Sheet C-2A). Stockpiles to be in place longer than 90
days will be seeded with the permanent seed mix to prevent erosion (see Exhibit E for seed mix information).
Table D-2 details a breakdown of the overall material balance of the project during mining. Topsoil stripping
volumes are based on six-inch topsoil depth. Since there will be a 26-acre lake at the conclusion of Phase 2
mining,overburden and topsoil will be replaced at approximately twice the salvage depth. Therefore, at the
completion of reclamation, there will be a thicker soil profile than what currently exists on site. The table
below outlines the anticipated topsoil and overburden material balances during mining.
O Y TETRA TECH
t;ri�;L ewicRi nd a Assex�ia4s, LL C D-4 �',