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• 11. [Image] Oregon Willamette Valley, sheet no. 6; Historic topo[topographic] map of the Willamette Valley

  	Surveyed in 1909-1911. Contour interval 5 feet. Scale 1/31680
  	Citation × Citation Citation Abstract Copy Title: Oregon Willamette Valley, sheet no. 6; Historic topo[topographic] map of the Willamette Valley Author: Geological Survey (U.S.) Year: 1911 Surveyed in 1909-1911. Contour interval 5 feet. Scale 1/31680 Title: Oregon Willamette Valley, sheet no. 6; Historic topo[topographic] map of the Willamette Valley Author: Geological Survey (U.S.) Year: 1911 Surveyed in 1909-1911. Contour interval 5 feet. Scale 1/31680 Close

• 12. [Image] Oregon Willamette Valley, sheet no. 8; Historic topo[topographic] map of the Willamette Valley

  	Surveyed in 1911 and 1914.
  	Citation × Citation Citation Abstract Copy Title: Oregon Willamette Valley, sheet no. 8; Historic topo[topographic] map of the Willamette Valley Author: Geological Survey (U.S.) Year: 1911 Surveyed in 1911 and 1914. Title: Oregon Willamette Valley, sheet no. 8; Historic topo[topographic] map of the Willamette Valley Author: Geological Survey (U.S.) Year: 1911 Surveyed in 1911 and 1914. Close

• 13. [Image] Oregon Willamette Valley, sheet no. 3; Historic topo[topographic] map of the Willamette Valley

  	Surveyed in 1908 and 1909. Contour interval 5 feet. Scale 1/31680
  	Citation × Citation Citation Abstract Copy Title: Oregon Willamette Valley, sheet no. 3; Historic topo[topographic] map of the Willamette Valley Author: Geological Survey (U.S.) Year: 1911 Surveyed in 1908 and 1909. Contour interval 5 feet. Scale 1/31680 Title: Oregon Willamette Valley, sheet no. 3; Historic topo[topographic] map of the Willamette Valley Author: Geological Survey (U.S.) Year: 1911 Surveyed in 1908 and 1909. Contour interval 5 feet. Scale 1/31680 Close

• 14. [Image] Oregon Willamette Valley, sheet no. 2; Historic topo[topographic] map of the Willamette Valley

  	Surveyed in 1908 and 1909. Contour interval 5 feet and 10 feet changing on the 450 foot contour. Scale 1/31680
  	Citation × Citation Citation Abstract Copy Title: Oregon Willamette Valley, sheet no. 2; Historic topo[topographic] map of the Willamette Valley Author: Geological Survey (U.S.) Year: 1911 Surveyed in 1908 and 1909. Contour interval 5 feet and 10 feet changing on the 450 foot contour. Scale 1/31680 Title: Oregon Willamette Valley, sheet no. 2; Historic topo[topographic] map of the Willamette Valley Author: Geological Survey (U.S.) Year: 1911 Surveyed in 1908 and 1909. Contour interval 5 feet and 10 feet changing on the 450 foot contour. Scale 1/31680 Close

• 15. [Image] Oregon Willamette Valley, sheet no. 9; Historic topo[topographic] map of the Willamette Valley

  	Surveyed in 1913 and 1914. Contour interval 5 feet and 25 feet, changing on the 450 foot contour. Scale 1/31680
  	Citation × Citation Citation Abstract Copy Title: Oregon Willamette Valley, sheet no. 9; Historic topo[topographic] map of the Willamette Valley Author: Geological Survey (U.S.) Year: 1919 Surveyed in 1913 and 1914. Contour interval 5 feet and 25 feet, changing on the 450 foot contour. Scale 1/31680 Title: Oregon Willamette Valley, sheet no. 9; Historic topo[topographic] map of the Willamette Valley Author: Geological Survey (U.S.) Year: 1919 Surveyed in 1913 and 1914. Contour interval 5 feet and 25 feet, changing on the 450 foot contour. Scale 1/31680 Close

• 16. [Article] Review of Estimates of ground-water recharge, base flow, and stream reach gains and losses in the Willamette River Basin, Oregon

  1 p. Review produced for HC 441: Science Colloquium: Willamette River Environmental Health, Robert D. Clark Honors College, University of Oregon, Spring term, 2004.

  Citation × Citation Citation Abstract Copy Title: Review of Estimates of ground-water recharge, base flow, and stream reach gains and losses in the Willamette River Basin, Oregon Author: Gordon, Eleanor, Lee, Karl K., Risley, John C., Geological Survey (U.S.) Year: 2006, 2004 1 p. Review produced for HC 441: Science Colloquium: Willamette River Environmental Health, Robert D. Clark Honors College, University of Oregon, Spring term, 2004. Title: Review of Estimates of ground-water recharge, base flow, and stream reach gains and losses in the Willamette River Basin, Oregon Author: Gordon, Eleanor, Lee, Karl K., Risley, John C., Geological Survey (U.S.) Year: 2006, 2004 1 p. Review produced for HC 441: Science Colloquium: Willamette River Environmental Health, Robert D. Clark Honors College, University of Oregon, Spring term, 2004. Close

• 17. [Article] Major-ion, nutrient, and trace-element concentrations in the Steamboat Creek Basin, Oregon, 1996

  This report presents the concentrations of major ions, nutrients, and trace elements in water and bottom sediments collected in the four-tributaries during the low-flow condition of September 9-13, 1996. ...

  Citation × Citation Citation Abstract Copy Title: Major-ion, nutrient, and trace-element concentrations in the Steamboat Creek Basin, Oregon, 1996 Author: Rinella, Frank A., Douglas County (Or.), United States. Forest Service, Geological Survey (U.S.) This report presents the concentrations of major ions, nutrients, and trace elements in water and bottom sediments collected in the four-tributaries during the low-flow condition of September 9-13, 1996. Stream-water chemistry results are contrasted, and trace-element concentrations compared with U.S. Environmental Protection Agency chronic aquatic life toxicity criteria. Bottom -sediment trace-element results also are constrasted and compared with concentrations considered to be enriched in streams of the nearby Willamette River Basin and to interim Canadian threshold effect level (TEL) concentrations established for the protection of aquatic life. Title: Major-ion, nutrient, and trace-element concentrations in the Steamboat Creek Basin, Oregon, 1996 Author: Rinella, Frank A., Douglas County (Or.), United States. Forest Service, Geological Survey (U.S.) This report presents the concentrations of major ions, nutrients, and trace elements in water and bottom sediments collected in the four-tributaries during the low-flow condition of September 9-13, 1996. Stream-water chemistry results are contrasted, and trace-element concentrations compared with U.S. Environmental Protection Agency chronic aquatic life toxicity criteria. Bottom -sediment trace-element results also are constrasted and compared with concentrations considered to be enriched in streams of the nearby Willamette River Basin and to interim Canadian threshold effect level (TEL) concentrations established for the protection of aquatic life. Close