- The objective of this study is to
answer four questions concerning the transportation
network on the Willamette National Forest. These
questions are 1) how many and what kind of roads
exist on the forest, 2) how much annual traffic
can these existing roads handle, 3) can the
existing system handle projected traffic volumes
and 4) if not, how many miles of new road are
needed to complete the transportation system.
Road logs were collected on the existing
transportation system. This data was then
synthesized and coded for computer storage.
Question one was answered by interpreting the
road log data, Questions two through four were
answered by running the road log data through
different computer programs designed for each
The results of answering these four questions
was a transportation model, which can predict the
average yearly traffic volume for every road in
the forest based on predicted timber harvest and
can also predict the number of miles of new road
needed for each new timber sale.
Since 1972 personnel on the Willamette National Forest
of western Oregon have been developing a long range land use
and timber management plan. Development of a plan that will
effectively deal with the variety of uses and wealth of
resources within the forest is a difficult and intense
activity moreover, a plan for any National Forest must
consider a host of laws and regulations including the
Wilderness Act of 1964, the Multiple Use-Sustained Yield
Act of 1960 and the National Environmental Policy Act of
1969. Also involved are U.S. Forest Service policies,
plus regional and statewide planning efforts.
The National Forests of the Pacific Northwest are
divided into six planning areas. The Willamette National
Forest is included in the Columbia-Willamette Planning Area
with three other National Forests (Map 1) An area guide
was prepared, establishing target outputs for major uses
of these Forests which share common issues, objectives,
and management directions.
With this background, the Willamette National Forest
started a planning process that developed a planning
organization, a public involvement program, forest coordinating
requirements, an inventory and analysis of data, and assumptions
concerning the future uses of the forest.