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REV91096
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REV91096
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Entry Properties
Last modified
8/25/2016 3:12:42 AM
Creation date
11/21/2007 11:08:54 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1981041
IBM Index Class Name
Revision
Doc Date
2/13/1995
Doc Name
ROADSIDE PORTALS PN C-81-041 TR 20 CHANGE IN MINE PLAN
From
DMG
To
POWDERHORN COAL CO
Type & Sequence
TR20
Media Type
D
Archive
No
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5. Baseline water quality and water level data do not appear to <br />be available for the North Portal Area. Page 41 of the PAP <br />states, "all of the formation units in the Roadside southern <br />permit area are above the river level and are recharged only <br />in response to local precipitation, and are, therefore, <br />relatively dry." No mention is made of the Roadside North <br />permit area. <br />However, page 60 of the PAP states, "where the sandstone and <br />coal beds dip below the Colorado River, they receive recharge <br />from it, are saturated, and therefore are considered aquifers. <br />Where these beds occur higher than the river level, they are <br />not completely saturated, and receive recharge only from local <br />precipitation events. In this case, the strata are not <br />considered aquifers." Exhibit 24 shows that, in the Cameo <br />permit area, the Rollins Sandstone, which immediately <br />underlies the Cameo B seam, dips below the elevation of the <br />Colorado River. Therefore, it would seem logical ,in infer <br />that the Rollins Sandstone is an aquifer beneath the Cameo <br />mine workings. <br />In accordance with Rules 2.05.6(3)(b) and 4.05.13(1)(b), <br />monitoring of groundwater quality and quantity should be <br />conducted at the Roadside North Portal Area. Please <br />incorporate a monitoring plan into this revision. <br />6. Exhibit 5 depicts that Roadside will be undermining Coal Creek <br />and Jerry Creek within this permit term. Please provide the <br />Division with surface water information for Coal Creek and <br />Jerry Creek locating all springs in accordance with Rule <br />2.04.7(2)(a). Please provide the Division with a spring and <br />seep monitoring plan in this technical revision application. <br />7. Please provide the Division with the minimum, maximum and <br />average flows which identify critical low flow and peak <br />discharge rates for Coal Creek and Jerry Creek in accordance <br />with Rule 2.04.7(2)(b). Surface monitoring flumes should be <br />placed upstream and downstream in Coal and Jerry Creeks with <br />continuous flow monitors. Please provide the Division with <br />the location of the surface monitoring flumes on Coal Creek <br />and Jerry Creek and a proposed surface water monitoring plan <br />in this technical revision application. <br />8. Page 55 of the permit states that the inflow of groundwater at <br />the Roadside South Portal mine has been monitored. The mine <br />inflow monitoring should be carried over to the Roadside North <br />Portal area. The mine inflow survey is a simple mapping and <br />recording of localized inflows and sump accumulation. Please <br />incorporate monitoring of the inflow of groundwater at the <br />Roadside North mine .in the permit text. <br />
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