REV93669

• Permit No: M1980183
• IBM Index Class Name: Revision
• Doc Date: 10/1/2001
• Doc Name: PIT 29 PN M-80-183 TR 002 ADEQUACY QUESTIONS
• From: DMG
• To: BRANNAN SAND & GRAVEL
• Type & Sequence: TR2
• Media Type: D
• Archive: No

III IIIIIIIIIIIIIIII
999
STATE OF COLORADO
DIVISION OF MINERALS AND GEOLOGY
Department of Natural Resources
1313 Sherman St., Room 215
Denver, Colorado 80203
Phone: [phone]
FAx: [phone]
October 1, 2001
Mr. Fred Marvel
Brannan Sand & Gravel
4800 Brighton Blvd.
Denver. CO 80216
RE: Pit No. 29, Permit No. M-80-183
Technical Revision 002; Adequacy Questions
Dear Mr. Marvel,
DIVISION OF
MINERALS
GEOLOGY
RECLAMATION
MINING•SAFETY
Bill Owens
Governor
Greg E. Walther
E~ecutwe Drreclor
Michael 8. Long
Division Director
The Division received your Technical Revision 002 (TR-2) for Pit No. 29, Permit No. M-80-183.
Listed below are adequacy review comments regazding the revision. The Division is required to
make an approval or denial decision no later than Octoberl5, 2001, therefore, your response to
the following adequacy review concerns should be submitted to the Division as soon as possible.
1. The operator provided a map locating all permitted water wells and surface water features on
Exhibit 2. The operator will need to state the owner of each well, the depth of each well, the
aquifer associated with each well and a description of how the well was completed.
2. In the application the operator states that the "neighbor's well" will be monitored to evaluate
potential impacts to the groundwater level. The operator must specify which wells will be
monitored, the frequency of the monitoring, the associated pazameters to be monitored and
commit to obtaining a series of baseline monitoring samples prior to dewatering any portion
of the pit. In addition, the operator will need to submit an agreement signed between the
operator and all owners of the wells to be sampled to ensure legal right of entry.
3. The operator states that suitable mitigation procedures will be instituted if water rights are
materially injured. Please explain the mitigation measures in further detail. In addition, at
what point is the water right considered injured? At what point will the mitigation plan be
implemented? Please explain in further detail.
4. Please explain how [he sttvctural integrity of the wells in the surrounding azea will be
impacted due to the rapid drawdown of groundwater associated with the pit.