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
-10-
sprinkling systems applying the appropriate amount of water to the crops being
produced, with the crops using most of the water applied to them, and with less
infiltration into the underlying water table. This is a normal result of changes to
irrigation methods of this type, and provides the most efficient way for all water
users in the area to utilize the available water resources. PAO does not currently
submit groundwater level measurement data to the Division, but can do so if the
Division desires to have this data for their records. PAO proposes to submit the
groundwater measurement data to the Division on an annual basis, and commits
to notifying the Division if groundwater levels change significantly from historic
seasonal levels.
33) Please specify what criteria would require implementation of the groundwater mitigation
plan. Please provide a timeline for response and notification to the Division in the case of
suspected off-site groundwater impacts.
Response: The attached Figure Exhibit G-1 shows the permitted wells within 600
feet of the mining limits. Note that the Rasmussen well is outside the 600 foot
buffer around the mining limit. The well information and locations were obtained
from the Division of Water Resources online mapping well permit locator. Well No.
1 is a monitoring well owned by the City of Lamar and as such will not be
adversely affected should groundwater levels fluctuate as a result of the mining
activities or post mining reclaimed use. Well No. 2 is a GP Resources well and has
a decreed use allowing GP Aggregates use of the well for the West Farm Pit
operations. All wells within 600 feet of the mining limits are either allowed to be
used by GP Aggregates, LLC, or are monitoring wells, therefore groundwater
fluctuations in these wells do not need to be addressed.
If PAO is notified that their mining and/or reclamation activities may have caused
a material impact on a surrounding well, PAO will investigate the situation within
24 hours, notify the Division at that time, and commits to providing any
investigation, engineering design, and construction of mitigation measures
required to mitigate the impact if the impact is found to be caused by the mining
and/or reclamation activities. Temporary and/or permanent mitigation measures
could include installing recharge ponds/ditches to raise groundwater levels,
perimeter drain piping or ditches to lower groundwater levels, new wells to
replace wells that cannot be rehabilitated, or providing an alternate source of
water.
As mentioned above PAO measures the groundwater levels in the monitoring
wells around the site on a monthly basis. A change in groundwater levels of
greater than 2 feet from the seasonal average indicates that the surrounding wells
or water rights could be affected. However, as mentioned above, there are no
wells within 600 feet of the mining limits so active monitoring of off-site wells is
not being conducted by PAO, and at this time PAO is not aware of any adverse
impacts to the surrounding wells. Should PAO be notified of a possible impact on
a surrounding well they will follow the procedure outlined above to investigate
and mitigate the impact.
34) The proposed lined reservoirs are at least partially located within the 100-year flood plain of
the Arkansas River. Please provide a flood analysis and flood control plan addressing how
the operation will safely convey the expected 100-year flood event throughout the life of
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