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2011-04-22_REVISION - C1981019
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2011-04-22_REVISION - C1981019
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Last modified
8/24/2016 4:32:47 PM
Creation date
4/26/2011 1:21:48 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1981019
IBM Index Class Name
REVISION
Doc Date
4/22/2011
Doc Name
2nd Adequacy Review Letter
From
DRMS
To
Colowyo Coal Company
Type & Sequence
PR3
Email Name
JHB
KAG
RDZ
TAK
MLT
Media Type
D
Archive
No
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Colowyo, C1981-019, PR3 adequacy No. 2 22 April 22, 2011 <br />a) The Area-Capacity table does not match the Elevation-Capacity-Discharge table in <br />Exhibit 7, Item 23. Please confirm which table is correct and that the contours on <br />the figure are correct and match the correct table. <br />b) One of the construction notes has text that has been truncated. <br />c) This figure has references to the floating siphon that must be removed. <br />Rule 4.05.7 Discharge Structures <br />1. Please provide documentation that energy dissipation is not required at the downstream end of <br />the lower clear water diversion or provide the design detail. <br />Rule 4.05.12 Protection of Ground Water Recharge Capacity <br />The application is adequate with regard to this Rule. <br />Rule 4.05.13 Surface Water and Ground Water Monitorin <br />1. Map I OB does not show proper annotation for the ground water monitoring wells. Please refer <br />to the legend and correct the ground water well annotation for the wells included in the water <br />monitoring plan. <br />The response is adequate. <br />2. To monitor and measure the development of a spoil aquifer, which the Division believes is <br />likely in the Collom Lite pit, please locate a future spoil water monitoring well on the map to <br />be added post-reclamation. Brief permit text narrative committing to the installation of this <br />well is also required. <br />The response is adequate. <br />3. In the groundwater lab parameter table in Section 4.05.13, please change the analysis for iron <br />from "total" to "dissolved". Although DRMS Rule 2.04.7(1) specifies analysis for "total" iron <br />in baseline data collection, the standards for iron in the Basic Standards for Groundwater <br />(Colorado Water Quality Control Commission Rule 41) are for the "dissolved" concentration. <br />Response is adequate <br />4. DRMS proposes that well MLC-04-01be established as an alluvial groundwater point of <br />compliance, based on a) the probable discharges of spoil leachate to Collum Gulch after mining <br />is completed, and b) the discharges can be expected to have a high dissolved solids content
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