Tiller Reservoir
In an average year the reservoir is capable of holding
water temperatures in South Umpqua River below 70° F.
for a wide range of regulation schedules. In a year of
maximum temperature, it will also hold temperatures
below 700 F. but flexibility of operation will be restricted.
Regulations...
To determine if squirrels (Sciurus douglasii var.) cut cones before the seeds are ripe, a series of collection points was established in the Willamette Valley and the Cascade Mountains in the summer of 1954. The areas were inspected at intervals during August, September and October of 1954, and freshly cut...
Urban areas currently cover a small fraction of Oregon’s landscape but will expand to accommodate an increasingly large proportion of the state’s growing population and economic activity. Residential developments on rural lands now cover more than twice the area occupied by Oregon’s urban developments and are growing rapidly. Oregon urban...
Several generations of Oregonians carry memories of a series of forest fires so sweeping that they spurred an entire state into action. These fires created what was for a long time called the "Tillamook Burn" -- a wide swath of devastation cut through old growth forests in the Coast Range....
Exceptional data are available for the study of the salmon runs of the Columbia River in 1938. Detailed figures on catch were supplied by Oregon and Washington in such form that they could readily be combined with the counts at Bonneville Dam to provide a basis for estimating the escapement....
The salmon of the Columbia River have supported an intensive fishery for over seventy years but are now showing unmistakable signs of depletion, and various factors are contributing to the rapid progress of this condition. Five species of fish enter into the commercial fishery on the Columbia River itself. These...
The Oceanbook focuses on the ocean environment from the coastline to roughly 200 miles offshore, the limit of U.S. jurisdic-tion, and from Cape Mendocino, California, to Vancouver Island, British Columbia. We excluded the intertidal area of interest to low-tide beachcombers from the Oceanbook because this area is well covered in...
The Oregon Conservation Strategy is an ambitious effort to synthesize the best available data, science, and knowledge into a broad vision and conceptual framework for long-term conservation of Oregon’s native wildlife. It is intended to be a dynamic, living approach that will be adjusted as new information and insights are...
The salmon runs of the Columbia River constitute one of the most important natural resources of the states of Oregon and Washington. Thousands of people are dependent, wholly or in part, upon these resources for their livelihood; and their welfare is dependent upon the maintenance of the salmon runs. It...
"One of the basic problems of forest management is that of restoring to
productivity denuded areas which cannot be expected to restock through natural means.
The most efficient method of regenerating such lands is that method which
provides adequate restocking in the shortest time with the least expense. Successful
direct...
Memorandum from the Division of State Lands giving the history of physical changes in Yaquina Bay relating to state ownership of tidal lands. "The following information on tideland sales, dredging filling, etc., is a comprehensive picture of these changes from 1895 to the present in order to determine the state...