USGS · 70175650
No abstract available.
Explore connections, maps & timelines
William Young. 1983. Groundwater resources of the Dallas-Monmouth area, Polk, Benton, and Marion counties, Oregon. https://pubs.usgs.gov/publication/70175650
Cite the original work for its findings. Save a collection to share your selection of sources.
KEEP EXPLORING
THE HARRISBURG - HALSEY AREA COVERS ABOUT 350 SQUARE MILES IN THE CENTRAL WILLAMETTE VALLEY , OREG., AND IS PART OF A BROAD ALLUVIAL PLAIN THAT LIES BETWEEN THE CASCADE AND COAST RANGES IN THE CENTRAL PART OF THE WILLAMETTE VALLEY . MOST OF THE DATA FOR THE 506 WELLS IN THIS REPORT WERE OBTAINED FROM WELL DRILLERS' REPORTS. CHEMICAL ANALYSES OF WATER FROM 36 WELLS ARE TABULATED. MOST OF THE HIGH-YIELD WELLS IN THE AREA PRODUCE WATER FROM ALLUVIAL (SAND AND GRAVEL) AQUIFERS THAT UNDERLIE THE VALLEY PLAIN OR THAT ARE COEXTENSIVE WITH THE PRESENT FLOOD PLAIN OF THE WILLAMETTE RIVER. THE WATER 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 .
GROUNDWATER FEATURES OF SIX LOWLAND AREAS IN THE KLAMATH BASIN OF OREGON -- KLAMATH MARSH AREA, AND SPRAGUE RIVER, SWAN LAKE, YONNA, POE, AND LANGELL VALLEYS--ARE DESCRIBED. RUGGED MOUNTAINS AND RIDGES SURROUND AND SEPARATE THESE LOWLANDS WHERE FLOORS RANGE IN ALTITUDE FROM 4,100 FEET IN POE VALLEY TO 4,600 FEET NORTH OF KLAMATH MARSH. THE SIX AREAS EXTEND OVER A NORTH-SOUTH DISTANCE OF 70 MILES, AN EAST-WEST DISTANCE OF 40 MILES, AND INCLUDE AN AREA OF APPROXIMATELY 600 SQUARE MILES. THE AREA IS SEMIARID AND RECEIVED ABOUT 14 TO 18 INCHES OF PRECIPITATION A YEAR. EXTINCT VOLCANOES AND THEIR EXTRUSIONS CHARACTERIZE THE AREA. MOST WELLS TAP PERMEABLE BASALT OR CINDERY RUBBLE BENEATH THE LACUSTRINE BEDS. THE DEPTHS OF WELLS RANGE FROM LESS THAN 50 TO NEARLY 2,000 FEET--MOST ARE BETWEEN 100 AND 1,000 FEET DEEP. FLOWING WELLS OCCUR IN ALL AREAS EXCEPT SWAN LAKE VALLEY. THE MOST EXTENSIVE AREA OF FLOWING WELLS IS IN THE SPRAGUE RIVER VALLEY, WHERE ABOUT 25 WELLS, SOME FLOWING MORE THAN 2,000 GPM, SUPPLY WATER FOR IRRIGATION. WATER LEVELS IN WELLS FLUCTUATE SEASONALLY FROM 1 TO 4 FEET. GROUNDWATER IN THE BASIN IS OF EXCELLENT QUALITY FOR DRINKING, IRRIGATION, AND MOST INDUSTRIAL USES.
THE CORVALLIS-ALBANY AREA IS PART OF THE ALLUVIAL PLAIN THAT LIES BETWEEN THE CASCADE AND COAST RANGES IN THE CENTRAL WILLAMETTE VALLEY IN NORTHWESTERN OREGON. THE ALLUVIAL DEPOSITS (SAND AND GRAVEL) OF THE VALLEY PLAIN CONTAIN THE MOST PRODUCTIVE AQUIFERS IN THE AREA AND ARE CONSIDERED TO BE THE ONLY UNITS FEASIBLE FOR LARGE-SCALE DEVELOPMENT OF GROUNDWATER SUPPLIES. DURING 1971 THE SEASONAL DECLINE OF WATER LEVELS FROM WINTER TO LATE SUMMER AVERAGED ABOUT 10 FEET FOR THE ALLUVIAL DEPOSITS. THE SEASONAL CHANGE OF STORAGE WAS ESTIMATED TO BE ABOUT 130,000 ACRE-FEET. OF THIS VOLUME, ABOUT 14,000 ACRE-FEET WAS PUMPED FROM WELLS; THE REST WAS DISCHARGED THROUGH SEEPS AND SPRINGS BY EVAPOTRANSPIRATION. THE DIFFERENCE BETWEEN PUMPAGE AND NATURAL DISCHARGE INDICATES THAT A GREAT QUANTITY OF ADDITIONAL WATER IS AVAILABLE FOR DEVELOPMENT. THE STORAGE CAPACITY OF THE ALLUVIAL AQUIFERS IS ESTIMATED TO BE ABOUT 750,000 ACRE-FEET BETWEEN DEPTHS OF 10 AND 100 FEET. WATER FROM THE ALLUVIAL DEPOSITS IS CHEMICALLY SUITABLE FOR ALL USES, AS IS MOST OF THE WATER FROM PERCHED-WATER BODIES IN THE OLDER SEDIMENTARY AND VOLCANIC ROCKS.