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Oregon Digital
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Willamette-Cowlitz lowland as well as a tidewater channel from the sea to the lowland.
LOWER COLUMBIA
EMPLOYED WORKERS IN RELATION TO
NATURAL RESOURCES
1940
* Employment in Service and in Manufacturing activities other .than production...
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JEWELL
ANN. PREC. 71.29 IN.
YALE
ANN. PREC. 94.47 IN.
SALEM
ANN. PREC. 37.17 IN.
CASCADIA
ANN. PREC. 63.55 IN.
LOWER COLUMBIA PRECIPITATION AND
TEMPERATURE DATA
SELECTED STATIONS
Image caption: DATA FROM : WEATHER BUREAU, U.... |
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problems and impedes drainage of agricultural lands.
Rising in the Cascades and discharging from relatively narrow, steep gorges into the flat-floored valley, the three upper main tributaries of the Willamette—the Coast Fork, Middle Fork, and...
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dale, Oreg., about 15 miles east of the Willamette. The greater part of its 520 square miles of drainage area is mountainous and heavily timbered, and only limited areas in the steeply rolling hill country along the lower reaches of the river have...
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Ground Waters
Variation in subsurface materials results in marked local differences in ground-water supplies.
Ground water is reasonably abundant in the alluvial fans which fringe the floor of the Willamette Valley. In the southern part of the...
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blocks of more productive agricultural lands in the Cowlitz and Lewis basins. The bottom lands along the lower courses of these streams are similar to the new alluviums of the Willamette Valley but are less extensive.
Red soils comparable to...
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muskrat, skunk, bobcat, mink, and otter. The numbers of beaver are steadily increasing.
Suitable habitats for waterfowl still of importance have been greatly reduced by the diking and draining of lands along the lower Columbia River. Parts of...
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Image captions: Looking east across city of Portland, Oreg., to Mount Hood. Cargo of lumber out-bound down the Willamette River, Portland, Oreg.
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earning capacity of the land. State holdings, especially those in Oregon, are small because State policies resulted in the early disposal of school land.
Land ownership and administration—Lower Columbia
Description or ownership Acres
Area...
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Image captions: Typical view of rolling farm lands in Willamette Valley, Oreg.
New farm clearing cut-over lands, cast side Willamette Valley, in Molalla River drainage area.
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and small grains characterize this area. Field crops are reported as the major source of farm income on nearly 13 percent of all farms. Stock farms, for which an average size of about 300 acres is considered desirable, are found in the southern...
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IRRIGATED AREAS NON-IRRIGATED AREAS
ADAPTED FROM MAPS BY BUREAU OF AGRICULTURAL ECONOMICS, U.S. DEPARTMENT OF AGRICULTURE
LOWER COLUMBIA
CROP LAND
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SOURCE: FOREST SERVICE, U.S. DEPARTMENT OF AGRICULTURE
LEGEND
FORESTS OF SAWTIMBER SIZE.
FORESTS LESS THAN SAWTIMBER SIZE.
RECENT AND NONRESTOCKED CUTOVERS, DEFORESTED BURNS.
NONCOMMERCIAL FOREST.
TOTAL SAWMILL CAPACITY *. IDLE...
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and wind throw, is estimated to be about three times the annual growth.
The situation, although serious, is not as critical as this ratio between annual depletion and growth suggests. More than half of the forest lands of this area are primeval,...
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Image captions: Forested western slopes of Cascade Mountains, Oreg. Loading point for logging operations in Douglas fir region, Oregon. (Men in foreground provide scale.)
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deposits near Molalla, Clackamas County, and Cottage Grove, Lane County.
Sands of the Columbia delta and the present and ancient beaches of Oregon contain heavy minerals—magnetite, titaniferous iron, ilmenite, chromite, garnet, sircon, and...
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providing connections with all parts of the world, Portland is a leading seaport. There are 67 piers, wharves, and docks along the 27 miles of deep-water frontage on the Willamette in Portland and vicinity. The annual volume of shipping on the...
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small-scale undertakings for the irrigation of special crops.
Power.—About two-thirds of the power plants established in the lower basin are hydroelectric. Most of the plants are located within the Willamette Basin. The two larger plants are...
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IRRIGATED LAND
POTENTIAL IRRIGATION PROJECT
EXISTING RESERVOIR RESERVOIR SITE
SUBDIVISION BOUNDARY
WATER POWER PLANT(I,000 H.P CAP., OR MORE)
POTENTIAL POWER PLANT
WATER RESOURCES DEVELOPMENT
LOWER COLUMBIA SUBDIVISION
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watt-hours. On tributaries of the Willamette not affected by enlargement of the 3 flood-control reservoirs, there are 21 potential power developments, and on the Lewis and Cowlitz Rivers, 25. The 46 latter potential developments have not been...
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The bulk (43,000 acres) of the area now irrigated in the Willamette Basin is served by several small pumping plants operated mainly for the irrigation of special crops by sprinkler methods. The bottom lands are, in general, too rough for flood...
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Flood control.—A comprehensive plan of water resource development in the Willamette River Basin has been prepared by the War Department and issued as House Document No. 544, Seventy-Fifth Congress, third session. Their plan sets forth storage...
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flooding is not considered practical. It is proposed, therefore, to provide irrigation for these lands by pumping and sprinkler methods.
Another area that has promising possibilities for irrigation development is the Marys River project,...
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