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GENERAL51166
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Last modified
8/24/2016 8:37:35 PM
Creation date
11/23/2007 6:35:26 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1981014
IBM Index Class Name
General Documents
Doc Date
6/21/2007
Doc Name
Midterm Review Findings Document
Permit Index Doc Type
Findings
Media Type
D
Archive
No
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primarily on exploration drilling, records of ground water use, information on regional <br />groundwater characteristics, monitoring information, inflow into underground workings at the <br />Southfield Mine and historic information on abandoned workings. <br />There are three categories of potential groundwater aquifers that occur in the permitted area. <br />These are 1) the Trinidad Sandstone, 2) coals of the Vermejo/Raton Formations and 3) <br />localized river alluvium. For a detailed analysis of each of these aquifers please refer to the <br />Probable Hydrologic Consequences of Section B. All ground water flow into these three <br />aquifers is the direct result of recharge collected from the Wet Mountains to the west. The <br />water flow is structurally controlled by the Chandler Syncline and runs along the axis north to <br />the Arkansas River where it discharges. <br />Surface Water <br />Surface water in the area flows from the Wet Mountains on the west to the plains on the east <br />then bends northward toward the Arkansas River valley. Most of the streams in the area are <br />ephemeral, flowing in response to snowmelt and intense rainfall events. Much of the <br />precipitation received is surficially absorbed into the colluvial material or is lost to evaporation <br />and transpiration. Local towns divert most of the remaining surface waters from the <br />mountain drainages for municipal use. The towns of Coal Creek, Rockvale and Florence all <br />have extensive water lines that utilize most of the water from Oak, Magpie and Newlin <br />Creeks. Water quality information taken from these districts show elevated levels of calcium- <br />bicarbonate, magnesium and barium. Metals such as cadmium, lead and zinc are slightly <br />elevated due to inactive and abandoned metal mines in the area. Severe channel erosion by <br />the downcutting action of the stream's headwaters into the pre-Cambrian metamorphic rocks <br />of the Wet Mountains, lend to increased levels of TSS in the streams. As these high-energy <br />streams proceed eastward, they encounter the softer more erodible rocks of the basin, which <br />continue to add to the TSS levels. <br />Additional information on the surface water for the permitted area can be found in Section <br />2.04.7 of the permit application and in Section B, "Probable Hydrologic Consequences" <br />section of this findings document. <br />Climatology <br />The climate is directly influenced by the topography, with heavier rainfall and cooler <br />temperatures in the mountains and less rainfall and~warmer temperatures in the basin. <br />Annual precipitation in the area is approximately 12.9 inches, with most of the precipitation <br />occurring during the spring and summer months. Average annual temperature for the area is <br />54 degrees with extremes of -20 to 100 degrees Fahrenheit. Prevailing wind direction is from <br />the west except during summer months when the wind originates from the southeast. Refer <br />to Section 2.04.8 of the permit for further information. <br />Veoetation and Soils <br />Information on vegetation is found in Section 2.04.10 of the permit application. Maps 14, 15 <br />and 16 show the vegetative and soil communities present in the mine permitted area. In <br />brief, the vegetative community consists of three types: riparian woodland, grassland and <br />
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