Nyra A. Johnson F. J. Frank 1975 <p><span class="EXLDetailsDisplayVal">THE <span class="searchword">HARRISBURG</span>-<span class="searchword">HALSEY</span> <span class="searchword">AREA</span> COVERS ABOUT 350 SQUARE MILES IN THE <span class="searchword">CENTRAL</span> <span class="searchword">WILLAMETTE</span> <span class="searchword">VALLEY</span>, OREG., AND IS PART OF A BROAD ALLUVIAL PLAIN THAT LIES BETWEEN THE CASCADE AND COAST RANGES IN THE <span class="searchword">CENTRAL</span> PART OF THE <span class="searchword">WILLAMETTE</span> <span class="searchword">VALLEY</span>. MOST OF THE <span class="searchword">DATA</span> FOR THE 506 WELLS IN THIS REPORT WERE OBTAINED FROM WELL DRILLERS' REPORTS. CHEMICAL ANALYSES OF <span class="searchword">WATER</span> FROM 36 WELLS ARE TABULATED. MOST OF THE HIGH-YIELD WELLS IN THE <span class="searchword">AREA</span> PRODUCE <span class="searchword">WATER</span> FROM ALLUVIAL (SAND AND GRAVEL) AQUIFERS THAT UNDERLIE THE <span class="searchword">VALLEY</span> PLAIN OR THAT ARE COEXTENSIVE WITH THE PRESENT FLOOD PLAIN OF THE <span class="searchword">WILLAMETTE</span> RIVER. THE <span class="searchword">WATER</span> TABLE IN THE ALLUVIAL AQUIFER IS GENERALLY ONLY A FEW FEET BELOW LAND SURFACE. PUMPING LIFTS ARE RELATIVELY SMALL, AND WELLS PRODUCE MODERATE TO LARGE QUANTITIES OF GROUNDWATER OF GOOD CHEMICAL QUALITY</span>.</p> application/pdf en U.S. Geological Survey Ground-water data in the Harrisburg-Halsey area, central Willamette Valley, Oregon reports