2019-08-29_PERMIT FILE - M2019028 ‎(3)‎

• Permit No: M2019028
• IBM Index Class Name: PERMIT FILE
• Doc Date: 8/29/2019
• Doc Name: Adequacy Review Response
• From: J&T Consulting
• To: DRMS
• Email Name: AME
• Media Type: D
• Archive: No

RE: J-2 Contracting Company—DPG Pit—Permit No. M-2019-028
I I2(c)Permit Application
Adequacy Review No. 1 Response 8126119
-4-
Response: Yes the maximum mining depth is 114 feet.
17) The operator proposes a designated concrete truck washout area consisting of a 30 foot
by 20 foot three-cell concrete structure. The Division was unable to locate this proposed
structure on the mining plan maps submitted. Please show the anticipated location for the
concrete washout area(s) on the appropriate mining plan map(s). Additionally, please be
sure to describe the proposed reclamation plan for this structure in Exhibit E, including
whether it will need to be demolished or backfilled under the proposed maximum
disturbance and bonding scenario. For example, if the operator is proposing to post a
bond that covers disturbances in only particular phases at this time, during which the
concrete washout structure will still be in use, then the reclamation plan (Exhibit E) and
bond estimate (Exhibit L) must account for reclamation of this structure.
Response: The concrete truck washout will be located at the west end of the recycled
concrete/asphalt stock pile area shown on the north side of Phase 3. The location has
been updated and labeled on the attached Exhibit C-5 map.
18) The operator proposes a 50 foot by 100 foot designated excess concrete product dumping
area with an exterior berm. The Division was unable to locate this proposed area on the
mining plan maps submitted. Please show the anticipated location for the excess concrete
dumping area(s) on the appropriate mining plan map(s). Additionally, please be sure to
describe the proposed reclamation plan for this feature in Exhibit E and include any costs
for its reclamation in Exhibit L for the proposed maximum disturbance and bonding
scenario.
Response: The excess concrete product dumping area is at the location of the recycled
concrete/asphalt stockpile. The location has been updated and labeled on the attached
Exhibit C-5 map. The reclamation costs have been included in Exhibit L for the proposed
maximum disturbance for the initial mining phase and areas.
19) The operator states that all local, State, and Federal rules and regulations will be followed
for the storage and handling of any fuel, asphalt, cement, flyash, and admixtures required
for the batching facilities. Given the location of the proposed operation within the 100-year
floodplain of the Cache La Poudre and South Platte Rivers (and 100 feet from the Cache
La Poudre River), it is especially important the operation practice proper storage and
handling procedures for the above listed materials. Please provide a spill prevention,
control, and countermeasure plan for the proposed operation.
Response: All local, State, and Federal rules and regulations will be followed for the
storage and handling of any fuel, asphalt, cement, flyash, and admixtures required for
the batching facilities if the facilities are ever utilized at the mine. The batching facilities
will be temporary and portable facilities. It is not known at this time when the temporary
portable batching facilities will be in place. Proper storage and handling procedures will
be followed if the facilities are put in place, there will be a specific SPCC plan provided to
the DRMS prior to the facilities being brought to the site. All SPCC plans will conform to
the EPA's rules and regulations. Best management practices will be utilized for
secondary containment and spill prevention.
20) The operator states that since reclamation will occur concurrently with mining, it is not
anticipated that overburden material will be stockpiled long-term prior to use in production
of road base and potentially backfilling of pit areas that are not lined with a slurry wall.
However, it is the Division's understanding the operator is proposing to construct a slurry
wall enclosure around an area/phase prior to mining out the pit. Please clarify what is
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