2022-11-22_REVISION - M2015030 ‎(2)‎

• Permit No: M2015030
• IBM Index Class Name: Revision
• Doc Date: 11/22/2022
• Doc Name: Request For Amendment To Permit
• From: Asphalt Specialties CO
• To: DRMS
• Type & Sequence: AM2
• Email Name: ECS
• Email Name: MAC
• Email Name: AWA
• Media Type: D
• Archive: No

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Chavers Mining Resource
DRMS Permit No.M-2015-030
Amendment No.2(AM-02)
November 2022
Page 3
back to the initial sedimentation pond to be re-used by the wash plant. Settled fines from
used wash plant process water sedimentation pond will be excavated and used as backfill.
■ Industrial Well: In addition to sand and gravel pit mining, a concrete production plant is
located on Cell 1 at the Site. The concrete production plant utilizes groundwater from the
on-site industrial alluvial well (Well Permit No. 80120-F)located near the southeast
corner of the Site.
ASCI maintains replacement water lease(s) and approved Substitute Water Supply Plan(SWSP)
through the Division of Water Resources(DWR)annually to account for out-of-priority depletions
resulting from the water diversions and impoundments.
6.4.4 (D) SIZE OF AREA(S) TO BE WORKED ON AT ANY ONE TIME
The maximum size of pit areas to be worked on at any one-time is approximately 20 acres.
6.4.4 (E) APPROXIMATE TIMETABLE FOR MINING OPERATION
Of the 95-acre permit area for the Chavers Mining Resource, approximately 75 of the acres are
mineable. The±75 mineable acres has been divided into six(6)mining cells (Cell 1 through Cell
6). Cell 1 (approx. 4 acres) has already been mined and backfilled. The mining operation is
estimated to last for another 8 years; however, this could vary depending upon market conditions.
Multiple cells may be exposed at one-time for concurrent mining and backfilling operations.
Mining Cell Size of Mining Cell Approximate Time Until
Mining Complete
Cell 1 4 acres Complete
Cell 2 8 acres 2 Years(in 2024)
Cell 3 32 acres 1 Year(in 2023)
Cell 4 23 acres 6 Years(in 2028)
Cell 5 4 acres 8 Years(in 2030)
Cell 6 4 acres 8 Years(in 2030)
Total 75 acres 8 Years(in 2030)
6.4.4 (F) STRATIGRAPHY
6.4.4 (F)(i) Nature of Deposit
The average overburden thickness is approximately 3.5 to 4.0 ft. The topsoil portion of the
overburden typically ranges from 12 to 24-inches in depth. The sand and gravel deposit varies in
thickness,but the average thickness is approximately 28 feet. It varies from sandy lean clay in the