PERMFILE119279

• Permit No: C1984065
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Section_Exhibit Name: 3.3 Hydrology and Geology
• Media Type: D
• Archive: No

three major joint sets: N76W 58SW, N25E 85NW, and N7772W 24NE.
Joint spacing ranges from a few feet and divides the rock mass into
rectangular blocks.
3.3.2.2 Surface-Facilities Area
Detailed geologic description, maps, and cross sections are
provided in Section 5.2 for the surface facilities area.
3.3.3 Recrional Ground Water
The regional bedrock ground water is of limited quality and
quantity. Geologic units which are water-bearing in the region,
generally have low overall permeability and lithologies which
degrade water quality. Also, geologic structures, such as deep
basins, inhibit ground water development in much of the area
because of the associated high drilling and pumping costs.
• Existence of relatively abundant surface water and shallow alluvial
ground water limits demand on deeper ground water; therefore,
knowledge of these systems is also limited.
The limited information on the regional hydrogeologic system
suggests that the predominant flow direction is towards the
Piceance basin from the upturned edge of the Grand Hogback mono-
cline. In the vicinity of the proposed NCEC underground hydraulic
mine, the regional flow would, therefore, be toward the south from
the exposed water-bearing zones. Local variations in this flow
regime would be expected near faults and certain topographic
features.
Alluvial deposits along the Colorado River provide abundant,
relatively good quality water to an east-west strip along the
river. Tributaries to the Colorado River also provide significant
quantities of water for irrigation, stock, municipal, and domestic
. purposes (Refer to Table 3.3-1 and Figure 3.3-5).
NCSC - Coal Ridge #1 3-17 AeC/1145/900301