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Map showing location and general features of the HarrisburgHalsey
Principal rock units and their general hydrologic properties
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acre-ft alluvial aquifers alluvial deposits Altitude aquifer average basal blue Butte Volcanic Series chemical quality chloride concentration Clay computed contamination diam drill-stem tests Drilled estimated feet figure Flow period flow pressure gal/min geohydrologic geohydrologic units geophysical logs ground water Harrisburg-Halsey area Hawaii hydraulic hydrologic indicate irrigation island Kauai Lanai lb/in limestone Little Butte Volcanic logs Madison Group Maui mean annual runoff minutes Mission Canyon Molokai monitoring Montana MSNC Oahu Ohio River Ohio River basin older alluvium Oregon percent permeable plate pond porosity potentiometric Powder River basin precipitation pumping range ratios recharge recovery began sampling Sand and gravel Sandstone saturated siltstone sources of pollution specific capacities specific yield storage streams study area Survey Water-Supply Paper Thickness Depth Materials tion transmissivity U.S. Geol U.S. Geological Survey upper Ohio River valley plain W.—Continued water levels water table water-bearing water-table Willamette River Willamette Valley younger alluvium zone