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2002-07-03_PERMIT FILE - M2002004 (2)
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2002-07-03_PERMIT FILE - M2002004 (2)
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Last modified
8/24/2016 2:18:41 PM
Creation date
11/3/2010 9:58:11 AM
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Template:
DRMS Permit Index
Permit No
M2002004
IBM Index Class Name
PERMIT FILE
Doc Date
7/3/2002
Doc Name
Responses to Adequacy Issues
From
Rio Grande Portland Cement
To
DRMS
Media Type
D
Archive
No
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• CONCLUSIONS AND RECOMMENDATIONS <br />The existing water quality in the Saint Charles River where the mine is located, and the water <br />quality of the Arkansas River just downstream of Pueblo have suffered degradation due to <br />irrigation return flows, municipal and industrial discharges, and effects of consumptive use for <br />both surface and ground waters. Groundwater utilized on-site would be from the Dakota <br />Sandstone aquifer, classified as non-tributary groundwater, which has better or similar quality <br />water when compared to the Saint Charles River or the Arkansas River. Precipitation would <br />absorb into the soil as initial abstraction and soil moisture or lost through evaporation. With only <br />12 inches of precipitation a year, annual runoff at the mine site would not be significant, with <br />measurable runoff only occurring during intense, longer-duration storm events. <br />All waters affected by mining operations or draining on the mine site would be conveyed to the <br />northern in-pit, sediment detention pond near the location of the one to five-year mining block. <br />The pond would be pumped within 5 days of storm events, and the discharge will be permitted <br />through the National Pollutant Discharge Elimination System (NPDES) program with the <br />Colorado Department of Public Health and Environment (CDPHE). Mandatory water quality <br />standards must be met in order to meet the designated uses of the receiving stream, and regular <br />sampling would be required for compliance. <br />Due to the scenario described above, it is unlikely that the water quality of the adjacent arroyos, <br />the Saint Charles River and ultimately the Arkansas River would be impacted by the mining <br />operations proposed. The permitted discharge outfall would serve as the point of compliance for <br />the mine. Water quality parameters would be monitored on a regular basis as deemed necessary <br />• by the CDPHE. <br />REFERENCES CITED <br />Aiken, A., E. Anderman, E. Harmon, S. Paschke, D. Plazak, and M. Riemann, eds. 2000. <br />Colorado Ground-Water Atlas. Colorado Ground-Water Association, Lakewood, CO. 127 p. <br />Cain, Doug. 1985. Quality of the Arkansas River and Irrigation-Return Flows in the Lower <br />Arkansas River Valley, Colorado. USGS Water-Resources Investigations Report 84-4273. <br />Lakewood, Colorado. <br />Cain, Doug and Duaina, Baldridge, Patrick, Edelmann. 1980. Waste-Assimilation Capacity of the <br />Arkansas River in Pueblo County, Colorado, as it Relates to Water-Quality Guidelines and <br />Stream Classification. USGS Water-Resources Investigations 80-82. Lakewood, Colorado. <br />Colorado Division of Water Resources (CDWR). 2001. Adjudicated Surface Water Rights <br />Database on CD-ROM. <br />Colorado Division of Water Resources, Office of the State Engineer (OSE). 2002. Permitted <br />Groundwater Wells Database on CD-ROM. <br />Colorado Division of Water Resources, Office of the State Engineer. 2002. Well Permit Nos. <br />057033, 057034, and 057035. <br />Colorado Department of Public Health and Environment (CDPHE), Water Quality Control <br />9
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