Letter of the Secretary of War, communicating, in compliance with the resolution of the Senate of the 5th of December, 1870, in formation relative to the probable cost of the improvement of the Umpqua and Willamette Rivers, in the State of Oregon.

Survey of Umpqua River, Oregon. Letter from the Secretary of War, transmitting report of the survey of Umpqua River, Oregon.
Published: (1890)

[Examination of bar at mouth of Umpqua River, Oregon.].
Published: (1910)

Estuary entrance, Umpqua River, Oregon ; hydraulic model investigation /
by: Fisackerly, G. M.
Published: (1970)

Willamette National Forest, Oregon /
Published: (1967)

Willamette National Forest, Oregon /
Published: (1947)

North Umpqua Ranger District : Umpqua National Forest, Oregon /
Published: (2005)

Land of Umpqua /
Published: (2007)

Profile surveys in 1914 in Umpqua River basin, Oregon /
by: Marshall, R. B. (Robert Bradford), 1867-1949
Published: (1915)

Willamette Pass winter recreation, Willamette and Deschutes National Forests, Oregon /
Published: (2012)

Willamette National Forest, Oregon : forest visitor map /
Published: (1990)

Bridge over the Willamette River, Oregon.
Published: (1886)

Bridges across the Willamette River, Oregon.
Published: (1884)

Environmental setting of the Willamette basin, Oregon /
by: Uhrich, Mark A.
Published: (1999)

Umpqua River. Memorial of the Legislative Assembly of the State of Oregon, praying for an appropriation for the removal of obstructions to the navigation of the Umpqua River.
Published: (1870)

[Erection of light-house on headlands at mouth of Umpqua River, Oregon.].
Published: (1888)

Umpqua River, Oregon. Letter from the Secretary of War, transmitting, with a letter from the Chief of Engineers, report of examination and survey of Umpqua River, Oregon.
Published: (1903)

North Umpqua trail.
Published: (1989)

Yaquina Bay and Willamette and Yamhill Rivers, Oregon.
Published: (1897)

Bridges over the Willamette River, in the State of Oregon.
Published: (1882)

Bridge across the Willamette River, at Portland, in Oregon.
Published: (1883)

Arsenic in ground water of the Willamette Basin, Oregon /
by: Hinkle, Stephen R.
Published: (1999)

Tracking heat in the Willamette River System, Oregon /
by: Rounds, Stewart, et al.
Published: (2022)

Ground-water hydrology of the Willamette basin, Oregon /
Published: (2005)

Willamette Valley National Wildlife Refuges, Oregon.
Published: (1983)

Ground-Water Resources of the Willamette Valley, Oregon.
Published: (1942)

Bridge across the Lower Willamette River, Oregon.
Published: (1905)

Bridge across the Willamette River at Albany, Oregon.
Published: (1890)

Ground-water resources of the Willamette Valley, Oregon /
by: Piper, Arthur M. (Arthur Maine), 1898-1989
Published: (1942)

Improvement of Willamette River between Oregon City and Portland, Oreg.
Published: (1931)

Improvement of Willamette River between Oregon City and Portland, Oreg.
Published: (1932)

Improvement of Willamette River, between Oregon City and Portland, Oreg.
Published: (1931)

Improvement of Willamette River between Oregon City and Portland, Oreg.
Published: (1932)

Willamette Cascades : USFS, Willamette National Forest, BLM northwest Oregon district /
Published: (2017)

Preliminary examination of Umpqua River, Oregon. Letter from the Secretary of War, transmitting, with letter of the Chief of Engineers, report of a preliminary examination of Umpqua River, Oregon.
Published: (1895)

Calvin B. West of the Umpqua : an obscure chapter in the history of southern Oregon /
by: Stuart, Reginald Ray, 1882-
Published: (1961)

Channel change and bed-material transport in the Umpqua River Basin, Oregon /
by: Wallick, J. Rose
Published: (2010)