Actions for Hydrologic and drill-hole data for test wells UE-29a No. 1 and UE-29a No. 2, Fortymile Canyon, Nevada Test Site

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Hydrologic and drill-hole data for test wells UE-29a No. 1 and UE-29a No. 2, Fortymile Canyon, Nevada Test Site

Author
Waddell, Jr, R. K.
Published
United States : [publisher not identified], 1985
Springfield, Va.: National Technical Information Service, [approximately 1985]
Physical Description
microfiche : negative ; 11 x 15 cm

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Summary
Test wells UE-29a No. 1 and UE-29a No. 2 were drilled in Fortymile Canyon, Nevada Test Site, as part of the US Department of Energy`s program to study the feasibility of constructing a high-level nuclear-waste repository beneath Yucca Mountain. The wells were designed to obtain data pertinent to characterizing the regional ground-water flow system near Yucca Mountain. Drilling of test well UE-29a No. 1 began September 25, 1981, and reached a total depth of 65.5 meters before being abandoned because of an irretrievable drill bit and collar down the hole. A second well, UE-29a No. 2, was drilled 8.9 meters from the first and reached a depth of 421.5 meters before caving problems stopped the drilling. Hydrologic testing of UE-29a No. 1 consisted of three short-term pumping tests, with pumping rates ranging from 0.61 to 1.64 liters per second. These tests were stopped when the water level inside the test well declined to the pump intake. A water sample was collected in a separate episode of pumping; that water had a carbon-14 content of 75.3% of modern. Test well UE-29a No. 2 was tested in two episodes of pumping. Temperature and tracejector logs were obtained during pumping. Water samples collected during the first episode had a carbon-14 content of 62.3% of modern. The second episode of testing involved pumping the upper part of the hole and obtaining temperature and tracejector logs. The second episode of pumping was complicated by generator failure and clogging of the pump intake by debris from the perforating charges. The water sample had a carbon-14 content of 60.0% of modern. Predominant ions in all samples were sodium, calcium, and bicarbonate. 10 figs., 7 tabs.
Report Numbers
DE85018283; USGS-OFR-84-142
Other Subject(s)
Collection
NTIS collection.
Note
DOE contract number: AI08-78ET44802
OSTI Identifier 59703
Research organization: US Geological Survey, Denver, CO (United States).
View MARC record | catkey: 47357892