2018-12-26_REVISION - M2008078 ‎(29)‎

• Permit No: M2008078
• IBM Index Class Name: Revision
• Doc Date: 12/26/2018
• Doc Name Note: Preliminary - Part 1 of 4
• Doc Name: Adequacy Review Response
• From: J&T Consulting
• To: DRMS
• Type & Sequence: AM1
• Email Name: AME
• Media Type: D
• Archive: No

RE: Prowers Aggregate Operators, LLC. — West Farm Pit—Permit No. M-2008-078
112c Permit Amendment Application (Revision No. AM-01)
Preliminary Adequacy Review Response 12121118
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8) The Exhibit C — Pre-Mining/Mining Plan Map shows a potential future multi-use railroad
corridor located between the North and South Mining Areas. Please provide more details
on this corridor.
Response: The railroad corridor is no longer planned to be used and has been
removed from the map.
9) The Exhibit C — Pre-Mining/Mining Plan Map does not label Co Rd Hh 8/10 which runs
east-west between the North and South Mining Areas. Please label this road on the map.
Response: The map has been revised to include the County Road Hh 8/10 label.
10) The Exhibit C — Pre-Mining/Mining Plan Map identifies existing culverts, bridges, ditches,
roads, and fences located on and within 200 feet of the proposed permit boundary. Please
include on the map the owner's name for all such structures, as required by Rule 6.4.3(g).
Response: An additional Exhibit C-2 Pre-Mining/Mining Plan Map has been added
with this information. All known permanent man-made structures within 200 feet
of the proposed permit boundary have been labeled with structure type and
owner's name. See the attached Exhibit C-2 Pre-Mining/Mining Plan Map.
11) The Exhibit C — Pre-Mining/Mining Plan Map does not include the buildings and other
permanent, man-made structures located within 200 feet of the proposed permit
boundary/affected land boundary south of Parcel A, and east and south of Parcel B. Please
include on the map the locations and owners of all permanent, man-made structures
located within 200 feet of the proposed permit boundary, as required by Rule 6.4.3(g).
Response: See comment to No. 10 above.
Exhibit D— Mining Plan (Rule 6.4.4):
12) Please provide specific details on the construction of the slurry walls. For slurry walls
already installed, please provide the final construction drawings. For proposed slurry walls,
please provide the design specifications, and commit to providing the final construction
drawings after installation is complete. Please provide more details on how the South
Mining Area slurry wall will be installed across the existing irrigation lateral and Co Rd Hh
8/10, as depicted on the Exhibit C — Pre-Mining/Mining Plan Map.
Response: Final construction drawings for slurry walls that have been installed
are attached. A "Soil-Bentonite Slurry Walls"design specification for future slurry
walls is attached. PAO will provide a technical revision to the Division with final
construction drawings for future slurry walls when they are constructed. The
future slurry wall alignment in the south mining area has been revised to not
cross the existing irrigation lateral and Co Rd Hh 8110.
13) Please confirm the proposed mining slope is 3H:1 V. (In the case that pit walls will be mined
at slopes steeper than 3HAV, the Division must hold costs in the reclamation bond for
backfilling pit slopes.)
Response: The proposed mining slope is 3H:1V. No backfilling of slopes will be
required for reclamation.
14) Please clarify the maximum disturbed area at any time. This acreage amount should
include all land currently disturbed and proposed to be disturbed by the operation (covered
by the reclamation bond proposed in Exhibit Q.
V= 305 Denver Avenue—Suite D•Fort Lupton CO 80621 •Ph: 303-857-6222•Fax: [phone]