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2015-02-26_REPORT - C1981028 (7)
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2015-02-26_REPORT - C1981028 (7)
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Last modified
3/29/2017 10:35:21 AM
Creation date
2/26/2015 12:52:00 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1981028
IBM Index Class Name
Report
Doc Date
2/26/2015
Doc Name
Annual Hydrology and Reclamation Report
From
Coors Energy Company
To
DRMS
Annual Report Year
2014
Permit Index Doc Type
Annual Reclamation Report
Email Name
TNL
DIH
Media Type
D
Archive
No
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Laboratory analysis: <br />The wells are sampled in a sequence that follows the order of least to <br />greatest level of salinity. At the end of 2013 this sequence continued to be: <br />(1) FPW, (2) AMW -1, (3) DH -96, (4) DH -122, (5) SMW -2 and (6) AMW -2. <br />Ash Monitor Well No. 2 (AMW -2) still continues to recharge following the <br />conclusion of the A -Pit reclamation activity. This process has been <br />ongoing since the end of 1999 when A -Pit reclamation was completed, but <br />only since 2004 has it resulted in volumes sufficient to allow sampling. <br />Adequate water volumes were found in this well during each of the semi- <br />annual samplings for 2013, making it possible to obtain samples following <br />the standard three -well volume purge procedure. While the well bore water <br />level recovery following testing remains slower, higher static water levels <br />provide evidence that the highly disturbed zone in the reclaimed overburden <br />area is recharging. The timeline for this recharge is consistent with previous <br />predictions. <br />Copies of the analytical laboratory test results are found in the pages <br />following this text. Each ground water monitoring well was sampled in <br />accordance with the "permit procedure ". The `B" designation following the <br />well identification confirms that the laboratory sample was obtained after <br />initial field sampling, well purging and a subsequent (second) field <br />sampling. The 2014 ground water monitoring test results remain consistent <br />with results from previous year's analyses in that there have been no <br />confirmed statistical exceedences, with but one exception, the samples <br />obtained from the SMW -2 well during 2004. The SMW -2 well is <br />completed in the disturbed spoil material which is being subjected to slow <br />re- saturation by ground water, and appears to be leaching dissolved <br />minerals as the water table rises. This has caused manganese concentrations <br />to somewhat exceed the calculated tolerance limit. CEC addressed this <br />tolerance limit exceedence with CDPHE during 2005, and was granted <br />permission to continue the current detection monitoring program [Doty & <br />Associates letter dated 04108105, "Alternate Source Demonstration, <br />Statistically Significant Increase Over Background Manganese in SMW -2, <br />Fourth Quarter 2004, Keenesburg Disposal Facility"]. <br />The direction of ground water flow, to the extent that it has been <br />documented in the area of the Keenesburg Mine property, trends <br />downgradient to the northeast. Recharge of the aquifer in the "spoil area" <br />continues to be limited to a single source, the localized infiltration of <br />36 <br />
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