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7/22/2021 1:58:23 PM
Creation date
3/21/2019 11:19:23 AM
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Reference Library
Title
HYDROGEOLOGY AND WATER RESOURCES OF THE SOUTHERN HIGH PLAINS DESIGNATED GROUND WATER BASIN: PHASE 2 STUDY
Author/Source
MCLAUGHLIN WATER ENGINEERS, LTD.
Keywords
BACA AND PROWERS COUNTIES, SOUTHERN HIGH PLAINS GROUND WATER MANAGEMENT DISTRICT, JOB NO. 99-02800300, HYDROGEOLOGY; BASIN DESIGNATION REPORT
Document Type - Reference Library
Investigations and Studies
Document Date
1/1/2002
Year
2002
Team/Office
Water Supply
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relationship is seen between wells #5154 and #5155 in cross-section C—C'. Thus, Map <br />3 was constructed as a Composite Potentiometric Map. <br />Prior to extensive ground -water development north of Walsh, an upward vertical <br />hydraulic gradient existed between the Cheyenne and overlying Dakota members of the <br />aquifer, as evidenced by artesian wells that were completed in the Cheyenne in which <br />water flowed up -casing, bypassing the Kiowa and Dakota (McLaughlin, 1954). Wells <br />#5056 and #5057, which currently have water levels at the 3770 feet elevation, were <br />drilled upslope from this area in 1951 and had initial water levels of 10 feet below ground <br />level, indicating a ground -water decline of over 150 feet to date. Although some wells <br />are completed in both the Dakota and Cheyenne members, at this location, the water <br />level is currently within the Kiowa Shale, which suggests the entire decline was from the <br />change in artesian head of the Cheyenne member. <br />As shown in Table 6-2, the Kiowa Shale member of the Dakota Aquifer cannot be <br />mapped throughout Baca County and has often been considered part of the Purgatoire <br />Formation. Locally the Kiowa is not an effective aquitard. In the northern part of the <br />District, thicker sequences of the Kiowa may be a partial barrier to flow between the two <br />members of the Dakota Aquifer. For example, in cross-section B -B', monitor wells <br />#5106 and #5103 appear to be measuring ground -water levels in the Dakota and <br />Cheyenne formations, respectively. These wells are about six miles apart and illustrate <br />the water table conditions that are prevalent in the Basin. Some faulting has been <br />mapped in the area (USGS, 1974), which may also have some influence on ground- <br />water flows. <br />The Cheyenne Sandstone is the lowest member of the Dakota Aquifer and retains the <br />highest percentage of saturation. Like the Dakota, this member is widely disbursed <br />across the District and its aquifer characteristics may vary greatly due to lithologic <br />variability. Historically north of Walsh along the Bear, Buffalo and Horse Creeks, the <br />Cheyenne was confined and had artesian flow. A high rate of withdrawal for irrigation <br />has lowered the water table in this area at least 100 feet. <br />6.3.5 Dockum Aauifer <br />The Dockum Aquifer is comprised of the Dockum Group. The Dockum Aquifer includes <br />a porous and permeable red -bed section that has become an important ground -water <br />source in southeastern Baca County and in the adjacent states. The Dockum is <br />exposed only in the canyons in the southwestern part of the District and along the <br />Cimarron River in the southeast. However, its varied characteristics make definitive <br />correlation difficult. Some irrigation wells in the southwest canyon floors are completed <br />VI 10 <br />99-028.003\Phase 2 Report\Hydrogeology <br />
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