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2018-03-26_REPORT - C1981008
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2018-03-26_REPORT - C1981008
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Last modified
3/27/2018 8:43:27 AM
Creation date
3/27/2018 7:11:13 AM
Metadata
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Template:
DRMS Permit Index
Permit No
C1981008
IBM Index Class Name
Report
Doc Date
3/26/2018
Doc Name Note
2011 Thru 2017 Year Report
Doc Name
Annual Hydrology Report Adequacy Review
From
Tabetha Lynch
To
Brock Bowles
Annual Report Year
2011
Email Name
TNL
BFB
Media Type
D
Archive
No
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Page 3 <br />Requirement Regulation Comment <br />20. Prevention of adverse <br />impacts to ground water <br />systems outside permit area <br /> <br />CDRMS regulation <br />4.05.11(1) <br /> <br />Well series GWN-N16P, GWN-N17P1 , GWN- <br />N18P1. (underburden, coal, overburden respectively) <br />Maximum levels of TDS, sulfate, calcium, sodium, <br />and magnesium occurred at GWN-N16P1 <br />(underburden). Maximum levels for TDS, calcium, <br />iron, manganese, and magnesium occurred at GW- <br />N17P1 (Dakota coal aquifer). Calcium appears to be <br />trending down. Iron is trending up and measured a <br />steep increase in 2016 and 2017 at GW-N17P1. <br />These are expected to continue to increase before <br />concentrations level off. pH is remaining stable. <br /> <br />GW-N3 (underburden within Tuttle draw) <br />Appears stable. <br /> <br />GW-N36, GW-N37, and GW-N38 (Up gradient <br />overburden, Dakota coal, and underburden <br />respectively) Up gradient maximums for Iron were <br />reached in 2010 and 2011. Parameters appear to be <br />decreasing in up gradient wells. <br /> <br /> GW-N39, GW-N40 (alluvial aquifer Calamity draw, <br />up and down gradient respectively) <br />Parameters appear stable with Iron tending up in the <br />up gradient GW-N39 and sodium and Magnesium <br />increasing in the down gradient GW-N40 <br /> <br />GW-N41, GW-N42, GW-N43 (Up gradient <br />underburden, coal, overburden respectively) <br />parameters appear stable and mostly decreasing. <br /> <br />GW-N44, GW-N45, GW-N46 (Down gradient <br />underburden, coal, overburden respectively) <br />Parameters are increasing within the Dakota coal <br />aquifer down gradient and mostly stable in the under <br />and overburden at this time. <br /> <br />21. Prevention of impacts to <br />ground water that adversely <br />impact post-mining land use <br /> <br />CDRMS regulation <br />4.05.11(2) <br /> <br /> <br />22. Minimize disturbance to <br />hydrologic balance within and <br />adjacent to the permit area <br /> <br />CDRMS regulation <br />4.05.1(1) <br /> <br /> <br />23. Prevention of material <br />damage to the hydrologic <br />balance outside the permit <br />area <br /> <br />CDRMS regulation <br />4.05.1(1) <br /> <br />Impacted are as predicted in the PHC.
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