The Cross Section, Volume 34, Number 2, February 1988 Page: 3
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Revised hydrologic atlases update ground
water availability
When the time comes to drill a
new irrigation well, many land-
owners wonder where the best site
is and how far they must drill to
reach the thickest portion of the
water-bearing formation. Others may
wonder which direction the water
table slopes under their land.
Newly-revised county hydrologic
atlases constructed and published by
the High Plains Underground Water
Conservation District No. 1 give land-
owners answers to these questions.
Each atlas packet contains a de-
scriptive text and four county maps.
Contour lines on the maps depict thealtitude of the base of the Ogallala
Formation, the water table altitude,
the land surface altitude and the
approximate saturated thickness of
the Ogallala Formation.
Subtracting the altitude of the base
of the formation from the altitude of
the land surface gives a landowner
the approximate depth to which a
well must be drilled.
The land surface altitude minus
the altitude of the water table gives
the approximate depth at which
water will be encountered. The dif-
ference in the elevation of the water
table and the elevation of the base ofthe formation is the saturated thick-
ness. Knowing the saturated thick-
ness helps landowners estimate the
expected yield from a well.
Revised hydrologic atlases now
available to the public include the
portions of Bailey, Castro, Cochran,
Crosby, Floyd, Hale, Hockley, Lamb,
Lubbock and Lynn counties located
within the Water District service
area.
Atlases for Armstrong, Deaf Smith,
Parmer, Potter and Randall counties
are in the final production stages and
will be ready in early 1988, according
to Don McReynolds, GeohydrologicDivision Director.
"The original hydrologic atlases
were printed in 1981. We have now
revised these atlases to include
updated water table elevation and
saturated thickness maps reflecting
1985 groundwater conditions. We
feel this has enhanced the estimation
of groundwater availability in these
counties," McReynolds says.
Atlases may be obtained by
visiting the High Plains Under-
ground Water Conservation District
No. 1 office, 2930 Avenue Q. Lub-
bock, Texas 79405 or calling (806)
762-0181.D E A F
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CASTRO COUNTY CENTER PIVOTS MAPPED - Engineer Technicians Obbie Goolsby and Arnold Husky have continued to plot the
Plains Underground Water Conservation District No. 1 service area. In Castro County, 336 center pivot systems are in operation.
$30,000 each, represent a $10 million dollar investment by county farmers. More than 90 percent of the center pivot systems are ec
water application efficiency of 80 to 90 percent. Most of these systems were installed on previously furrow-irrigated land, where
congratulations to Castro County landowners for their involvement with this tremendous water conservation and energy saving ilocations of center pivot sprinklers in the High
These sprinklers, assuming an average cost of
quipped with drop lines, which have an average
efficiency ratings were about 60 percent. Our
management tool.S
IH A L E
CO U UNTYr
February 1988
THE CROSS SECTION
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High Plains Underground Water Conservation District No. 1 (Tex.). The Cross Section, Volume 34, Number 2, February 1988, periodical, February 1988; Lubbock, Texas. (https://texashistory.unt.edu/ark:/67531/metapth1533155/m1/3/?rotate=90: accessed July 16, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu; crediting UNT Libraries Government Documents Department.