Basic data report for drillholes H-17 and H-18 (Waste Isolation Pilot Plant-WIPP)

Drillholes H-17 and H-18 were drilled at the WIPP site to assess uncertainties in site hydrologic parameters and to serve as monitoring points for planned hydrologic tests. H-17 was drilled south of H-11 and east of P-17 to evaluate the existence of a high-permeability region in the Culebra Dolomite Member that had been indicated by groundwater-flow modeling and surface geophysical surveys. H-18 was drilled north of H-2 to help reduce the uncertainties of boundaries between high and low transmissivities and fluid density that had been identified by drilling and by modeling. 1 ref., 4 figs., 6 tabs.