Results
2426 - 2450 of 5942 Items << < 93 94 95 96 97 98 99 100 101 102 > >>
2426 - 2450 of 5942 Items << < 93 94 95 96 97 98 99 100 101 102 > >>
|
East fish trap and upper part of fish ladder at the Rock Island Dam
1939-07-31
|
|
Putting water in fish truck showing hatch on fish tank at the Rock Island Dam
1938-11-30
|
|
Master scanned with Epson 1640XL at 800 dpi. Image manipulated with Adobe Photoshop 7.0.
|
|
Plan provides a building block leading to site-specific recreation development decisions. It serves as an
illustration, or graphic representation of the recreation plan goals and policies, giving them spatial reality on the ground.
Two...
|
|
Releasing marked fish above Bonneville Dam with the anal and right vental removed
1940-06-17
|
|
Wood trestle used in driving west cofferdam. Lower right corner is contractor's catwalk across Columbia River
1935-01-30
2024-11-02 |
|
1. Six major types of commercial gear have been used to take salmon and steelhead on the Columbia River; namely, gill nets, set nets, seines, traps, fish wheels and dip nets. 2. The five important commercial species in the Columbia River are...
1948 (iso8601)
|
|
Recent research conducted throughout the Northern California Current (NCC) on the ecology of Pacific salmon (Oncorhynchus spp.) indicates that variable ocean conditions affect the community composition of zooplankton in the nearshore environment...
2012-05-29 (iso8601)
|
|
A major challenge in drafting the legislation concerned the relative roles of the federal, state, and local governments. Another was what constituted fair treatment of the many private landowners in the Gorge.
In response to these many...
|
|
Master scanned with Epson 1640XL at 800 dpi. Image manipulated with Adobe Photoshop 7.0.
1936-07-31
2003-01-01 |
|
difficult to get off nets when wet and nearly impossible to remove when dry as it hardens to a substance resembling putty or plastic wood.
b. Biological masses with a heavy content of plant trash and leaf and grass fragments which adhere to nets...
|
|
Holocene hemipelagic deposition of terrigenous silts and clays
dominates sedimentation on most of the Oregon and Washington continental
slope. The sources of these sediments, the mechanisms causing sediment
dispersal, and the relative...
1982-04-13 (iso8601)
|
|
The thesis area includes 54 square miles of the southeastern
Cuddy Mountains in west-central Idaho. The oldest rocks within the
area are plutonic phases of the Jurassic Cuddy Mountain complex.
These and Cretaceous (?) intrusive and associated (?)...
1970-05-20 (iso8601)
|
|
Document: "Snake-Colorado Project, A Plan to Transport Surplus Columbia River Basin Water to the Arid Southwest", October, 1963, table 5
1963-10-01
|
|
Document: Statement presented by Senator Len B. Jordan To Senate Irrigation and Reclamation Subcommittee During Hearings on Central Arizona Project (S. 1658) In discussion of Pacific Southwest Water Plan, April 17, 1964, page 5
1964-04-17
|
|
finally proved impossible for him to get away from business, and asking me to go ahead and see the Big Bend trip through without him. In the event I decided to continue on down the river he would be glad to have his cameraman accompany me as long...
2004-08-05
|
|
A photographic postcard that has been hand-tinted. The legend in red at the top reads "Tonging for Toke Point Oysters, near mouth of the Columbia River". More than a dozen men are each standing a wooden boat. The boats are flattened in profile and...
2004-08-05
|
