2016-07-14_PERMIT FILE - M2016010

• Permit No: M2016010
• IBM Index Class Name: Permit File
• Doc Date: 7/14/2016
• Doc Name: Adequacy Review Response
• From: Transit-Mix Concrete Co.
• To: DRMS
• Email Name: AME
• Media Type: D
• Archive: No

Jerry Schnabel, Bob Stabo
July 11, 2016
Page 10
analysis of well impacts for Transit Mix, however, focuses on existing wells and does not opine
on potential future development in the area. In addition, little to no impact is expected to the
existing wells identified through the research and analysis for these efforts and little to no impact
would be expected for additional future wells constructed near the existing wells.
All well permits within approximately 1 mile of the proposed quarry were included in the previous
research and analysis effort, but only existing wells with valid well permits, based on the State's
well database, were included in our summary table and mapping as nearby wells.
As presented in the mapping and well inventory,there is only one well(Permit No. 179279)located
to the east of the north-south oriented high angle thrust faults that is reported to be completed in
granitic material. The previous text misidentified "some of the existing wells" located to the east
of the faulting, as there is only one granitic well located to the east of the faulting. The presence
of this well does indicate structural complexity which likely suggests additional fault blocks and
faulting below the ground surface that is not observed in the geologic mapping.
The majority of the wells located to the west of the north-south oriented high angle thrust faults
are completed in the faulted areas associated with Little Turkey Creek. The wells located further
north of the creek are likely intercepting fractures that provide water to the wells outside of the
faulting that controls the creek. It is more likely that operations at the mine would impact these
wells, compared to the wells to the east of the thrust faulting, because they are constructed in the
same geologic material as the mine. Interception of water within the mine area would potentially
reduce water levels across the fractured aquifer to a well if the same saturated fracture was
encountered by both the mine and a well in this granite material,but because the evidence indicates
that ground water will not be intercepted by the mine, there should be no impacts to the ground
water system or the neighboring wells.
Monitoring Plan
Comment: The CDRMS has recommended that Transit Mix install monitoring wells in the
fractured bedrock areas associated with Little Turkey Creek and Deadman's Creek to identify
existing ground water conditions before mining begins including monitoring wells located both up
and down gradient from the proposed mining. CDRMS has also recommended that Transit Mix
consider the installation of monitoring wells outside the fractured areas associated with the creeks
as recommended in our February 18, 2016 summary.
Response: Transit Mix is planning for the installation of monitoring wells that intercept the
fractured areas associated with Little Turkey Creek and Deadman's Creek, as described in the
Monitoring Plan for the proposed mining. This monitoring plan will include monitoring wells in
each drainage both up and down gradient from the proposed mining. Monthly investigation of the
monitoring wells will include the measurement of water levels, field parameter measurement and
the collection of water quality samples for analysis.
With the requirement to install monitoring wells in the productive fractured areas,there is less of
a need for deeper monitoring wells outside of the fractured areas. Ground water is not expected
to be encountered outside of the fractured areas, actual impacts of mining will be monitored with