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GENERAL53629
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Last modified
8/24/2016 8:39:07 PM
Creation date
11/23/2007 8:47:26 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
M1999002
IBM Index Class Name
General Documents
Doc Date
1/19/1999
Doc Name
MEMO DRAFT ENVIRONMENTAL IMPACT STATEMENT
From
STEIGERS CORP
To
DMG
Media Type
D
Archive
No
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' Executtue Summary <br />' impacts of Accelerated Development Altemative would be similar, and would involve a slightly <br />larger azea of disturbance, and a shorter period of mining operations. <br />Surface Water and Surface Water Resources - No significant long-term impacts to surface <br />' water resources aze anticipated. Short-term increases of sedimentation would result from <br />constmction activities at all three project sites which would be minimized with the effective <br />implementation of Best Management Practices (BMPs) and reclamation efforts. The only <br />' dischazges to surface water drainages would be of hydrostatic test water from the natural gas <br />pipeline and product pipelines. The water would be tested prior to discharge to assure no water <br />quality violations would occur. Approximately 1,158 acre-feet per yeaz (1.6 cubic feet per <br />' , second [cfs]) of water from the Colorado River and alluvial groundwater wells would be <br />consumed by production and processing activities. The effects of depletion and mitigation <br />' measures would be developed in consultation with the U.S. Fish and Wildlife Service (refer to <br />Threatened and Endangered Species). Water would also be taken in priority from Piceance <br />Creek for a short term for hydrostatic testing of the natural gas pipeline. Under the Accelerated <br />Development Alternative, potential effects would be similar to the Proposed Action. Temporary <br />increases in sedimentation from ground disturbing activities would be more pronounced due to <br />the greater azea of exposed soil at any given time period. The water usage would increase to <br />' 3,475 acre-feet per year (4.8 cfs). <br />Groundwater. The Proposed Action and Accelerated Development Altemative would not affect <br />' groundwater quantities, but may degrade groundwater quality from accidental release of <br />production fluids or from migration of poorer quality groundwater from the Lower Aquifer to the <br />Upper Aquifer. The Alluvial Aquifer could be degraded ifthere were a liner failure at the <br />evaporation ponds. Any potential releases to groundwater would be minimized by the project <br />design and leak detection monitoring and response procedures. Monitoring would be used to <br />determine whether releases have occurred, to evaluate the impacts of a release, and to design <br />' corrective actions. <br />Air Quality. The Proposed Action would cause increases in the emission of fugitive dust, PM~o, <br />nitrogen oxides (NOr) and carbon monoxide (CO) during construction and operation from <br />vehicles, heavy equipment, well-drilling, processing facilities, and well field operation. <br />Maximum ground level concentrations of air pollution (including background and interacting <br />' sources) predicted, are well below the applicable standazds (National Ambient Air Quality <br />Standazds [NAAQS]/Colorado Ambient Air Quality Standards [CAAQS]). The cumulative <br />impact analysis performed for emissions of nitrogen dioxides (NOz) and PM~o from the <br />' processing facilities demonstrated that impacts would be less than the Class II significant impact <br />levels. Results from the Class I increment analysis indicate that the project would cause impacts <br />less than the Class I significant impact levels. A Leve[ 1 regional haze visibility analysis <br />indicates no significant effects to the visibility at the Flat Tops Wildemess Area. An analysis <br />performed for the deposition of sulfates and nitrates (i.e., acidification process) indicates the <br />Proposed Action would not have a significant effect on the lake water chemistry at the Flat Tops <br />' Wildemess Area. <br />The Accelerated Development Alternative would result in increasing emissions by a factor of <br />' two to three. This would also result in increasing the level of impact due to the air pollutant <br />emissions. A screening level review indicates that the Accelerated Development Altemative <br />ES-3 <br />
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