WORKING PAPER NO. 27
COLUMBIA RIVER BASIN PROJECT
For Water Supply and Water Quality Management
MIDDLE WILLAMETTE BASIN (OREGON)
PRELIMINARY ECONOMIC RECONNAISSANCE
AND ESTIMATE OF GROWTH, 1960-2010
DATE; August 10, 1962
Prepared by EES
Reviewed by
Approved by
DISTRIBUTION;
Project Staff
Cooperating Agencies
.General
U. S. DEPARTMENT OF HEALTH, EDUCATION, AND WELFARE
Public Health Service
Region IX
Division of Water Supply and Pollution Control
Room 570 Pittock Block
Portland 5, Oregon
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This working paper contain! preliminary data and information
primarily intended for internal use by the Columbia River
Basin Project staff and cooperating agencies. The material
presented in this paper has not been fully evaluated and
should not be considered as final.
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MIDDLE WILLAMETTE BASIN (OREGON)
PRELIMINARY ECONOMIC RECONNAISSANCE
AND ESTIMATE OF GROWTH. 1960-2010
Table of Contents
INTRODUCTION 1
Purpose of This Analysis 1
Definition of the Area 1
Study Period 1
Limitations of This Analysis 2
PRESENT ECONOMIC BASE 2
Population 2
Industry 5
Agricultural Land Use 9
ESTIMATED FUTURE GROWTH 10
Factors Influencing Future Growth 10
Future Employment 11
Future Population 15
Prepared by: Economic Studies Group
Water Supply and Pollution Control
Program, Pacific Northwest
August 1962
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MIDDLE WILLAMETTE BASIN (OREGON)
PRELIMINARY ECONOMIC RECONNAISSANCE
AND ESTIMATE OF GROWTH. 1960-2010
INTRODUCTION
Purpose of This Analysis
This analysis is intended to provide a preliminary estimate of the economic
potentials and anticipated growth of the subject area.
Definition of the Area
The Willamette River Basin divides conveniently into three parts: (1)
the Lower Portion, comprising the Portland Metropolitan Area (Clackamas,
Multnomah, and Washington Counties); (2) the Middle Portion, comprising
Benton, Linn, Marion, Polk, and Yamhill Counties; and (3) the Upper Portion,
comprising Lane County. This report is an analysis of the economy of the
Middle Portion.
Physically, the western part of Benton County, comprising the Alsea River
drainage, lies outside the Willamette River Basin, draining directly into
the ocean. However, because basic statistics are available on a county
basis, all of Benton County is included in the study area. Since the Alsea
portion of Benton County comprises less than one-half of one per cent of
Middle Willamette Basin population, no significant distortion is involved.
With this exception, the boundaries of the five-county area conform
approximately to the Willamette Basin boundaries.
Study Period
The study period is the SOTyear period 1960-^2010, with an interim point at
1985.
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Limitations of This Analysis
Two limitations apply to this study. The first is that it is intended only
as a preliminary estimate of the outlook for the subject area's growth.
Subsequently, in connection with the Columbia River Basin Project for
Water Supply and Water Quality Management, an analysis will be made on an
industry-by-industry basis of the growth potential in the various sub-basins.
At that time, this preliminary estimate will be reviewed, and revised if
necessary.
The second limitation is that this study is intended for use particularly in
assessing future water needs. Emphasis has been placed on the analysis of
those industries which make heavy demands upon the water resource. Other
industries have been considered only insofar as they may have a significant
effect on future population. For this reason, this study is not submitted
as a detailed industrial forecast.
PRESENT ECONOMIC BASE
Population
Total population in the five counties of the Middle Willamette Basin, as of
April 1960, was 278,000. Table I shows how this population was distributed
among the cities and sub-basins of the Middle Basin in 1960, and also the
comparable figures for 1950. The Middle Basin has boon divided among 15
"sub-basins." One of these is the."Salem Urban Area," which includes not
only the City of Salem but also the built-up, but as yet unincorporated,
areas around it. The 1950 figure for the "Salem Urban Area" is an estimate
of the population within the same boundaries used for the I960 definition.
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03
Table:I '
POPULATION, BY SUB-BASIN AND INCORPORATED PLACES^ MIDDLE WILLAMETTE BASINS/
Estimated Pop'n.
Population of of Sub-Basin,
Incorporated Place Nearest thousand
Sub-Basin or Incorporated Place
SALEM URBAN AREA^/
Salem city
WILLAMETTE MAIN STEM
Albany
Corvallis
Dundee
Harrisburg
Independence
Monmouth
Newberg
Sti Paul
YAMHILL
Amity
Carlton
Dayton
Lafayette
McMinnville
Sheridan
Willamina
Yamhill
PUDDINGS/
Aurora
Donald
Gervais
Hubbard
Mt. Angel
Scotts Mills
Silverton
Woodburn
NORTH SANTIAM
Detroit
Gates
Idanha
Lyons
Mill City
Stayton
1930
43,140
242
187
457
493
1,315
217
3,146
2,395
274
422
442
1,792
1,507
1960
49,142
57
73
10,115
16,207
308
862
1,987
1,956
3,946
226
12,926
20,669
318
939
1,930
2,229
4,204
254
28
26
672
1,081
719
662
6,635
1,922
1,082
539
620
959
673
553
7,656
1,763
960
407
25
25
274
201
438
526
1,428
155
3,081
3,120
206
189
295
463
1,289
2,108
10
(continued).
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Table I (cont'd)
Sub-Basin or Incorporated Place
SOUTH SANTIAM
Lebanon
Scio
Sweet Home
Waterloo
SANTIAM, MAIN STEM BELOW FORKS
Jefferson
MILL CREEK
Aumsville
Sublimity
Turner
RICKREALL
Dallas
LUCKIAMUTE
Falls City
MARYS
Philomath
CALAPOOYA
Brovmsville
Sodaville
MUDDY GREEKS''
Halsey
LONG TOM£/
Monroe
TUALATIN^
TOTAL, MIDDLS WILLAMETTE RIVER BASIN DRAINAGE
ALSEA RIVER DRAINAGE (COASTAL), BENTON COUNTY
TOTAL, 5 COUNTIES OF MIDDLE BASIN
Population of
Incorporated Place
Estimated Pop'n.
of Sub-Basin,
Nearest thousand
1950
5,873
448
3,603
180
636
281
367
610
4,793
853
1,289
1,175
157
388
362
DRAINAGE
iN COUNTY
1960
5,858
441
3,353
151
716
300
490
770
5,072
653
1,359
875
145
404
374
1950
25
2
5
8
6
7
8
2
1
1
246
1
247
1960
26
2
6
8
5
8
8
1.5
1
1
277
1
278
a/ Includes Benton, Linn, Marion, Polk and Yamhill Counties.
b/ Defined as the area included within the following 1960 Census County
Divisions: Four Corners, Hayesville, Keizer, Salem, and Salem Heights.
c/ These figures include only that portion of the basin within the 5-county
Middle Willamette Basin area.
d/ Unincorporated in 1950. Figure shown is an estimate.
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Industry
The economy of the Middle Basin is more diversified than that of Lane County.
Lumber and wood products manufacturing employment constituted 55 per cent of
the total labor force in the Middle Basin in 1960, as compared to 80 per cent
in Lane County. Ten per cent of the Middle Basin labor force is.in agricul-
ture, compared to about three per cent in Lane County. Table II shows
employment, by industry, in the Middle Basin in 1960, with comparable
figures for 1950, and the percentage distribution of the total labor force.
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06
Table II
EMPLOYMENT, BY INDUSTRY, MIDDLE WILLAMETTE BASIN, 1950 and 1960s'
Employment, Change in Distribution
nearest Employment, of Employment,
Industry
Total Labor Force
Military
Unemployed
Industry not reported
Classifiable employed
civilian labor force
Agriculture
Forestry and fisheries
Mining
Manufacturing, total
Lumber, wood products
Primary metals
Fabricated metals
Machinery, incl. electric
All other durables
Food and kindred
Textiles and apparel
Printing and publishing
Pulp and paper
Other non-durables and n.e.c,
Construction
Education, government
Education, non-government
Public administration
All other services
1950
941
2
61
12
866
165
2
3
199
136
1
1
4
3
23
4
11
10
6
64
51
8
46
328
1960
1,014
6
68
21
919
102
5
2
202
110
7
3
10
7
30
3
14
14
4
63
79
15
65
386
1950-1960,
hundreds
per cent-
+73
+ 4
+ 7
+ 9
+53
-63
+ 3
- 1
+ 3
-26
+ 6
+ 2
+ 6
+ 4
+ 7
- 1
+ 3
+ 4
- 2
- 1
-:-28
+ 7
+19
+58
1950
100.0
.2
6.5
1.3
92.0
17.5
.2
.3
21.2
14.5
.1
.1
.5
.3
2.4
.5
1.1
1.0
.7
6.8
5.4
.9
4.8
34.9
1960
100.0
.6
6.7
2.1
90.6
10.1
.5
.2
19.9
10.9
.7
.3
1.0
.7
2.9
.3
1.4
1.3
.4
6.2
7.8
1.5
6.4
38.0
&/ Includes entire labor forrce of Benton, Linn, Marion, Folk and Yamhill
Counties. Sf.uce employment figures axe not available on a less-than-county
basis, the AJ.cea (coastal drainage) portion of Benton County has not been
excluded. However, the Alsea portion's population is less than 0.3% of total
5-county popx;lation, so that no significant distortion is introduced.
b/ Based on unrounded figures.
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An indication of the economic base of the Middle Basin, that is, the type
and degree of specialization in its economy, can be drawn from a comparison
of the distribution of employment there with the distribution in the Portland
Region as a whole. This is shown in Table III. Like the Portland Region,
the Middle Basin has a high percentage of total manufacturing employment
in lumber and wood products, even though the concentration is less than in
the more highly specialized economy of Lane County. The Middle Basin also
has some specialization in food processing, with 2.9 per cent of its labor
force in that industry, as compared to 2.6 per cent in the Portland Region
as a whole. Aside from these two manufacturing activities (lumber and wood
products and food processing), the economic base of the Middle Basin depends
significantly on two service industries--education and public administration.
The concentration of employment in educational services is due to the
location within the Middle Basin of Oregon State University, at Corvallis;
Willamette University, at Salem; and Oregon College of Education, at
Monmouth. The concentration of employment in public administration is due
to the location of the state capital at Salem. In addition to lumber and
wood products and food manufacturing and education and public administration,
agriculture is an important part of the economic base of the Middle Basin.
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Table III
LABOR FORCE DISTRIBUTION, BY. INDUSTRY
MIDDLE WILLAMETTE BASIN AND PORTLAND REGION, APRIL 1960
Middle
Willamette Portland
Basin Region
Industry %
Total Labor Force
Military ;
Unemployed
Industry not reported
Classifiable employed
civilian labor force
Agriculture
Forestry and fisheries
Mining
Manufacturing, total
Lumber, wood products
Primary metals
Fabricated mstals
Machinery, incl. electric
All other durables
Food and kindred
Textiles and apparel
Printing and publishing
Pulp and paper
Other non-durables and n.e.c.
Construction
Education, government
Education. rum-government
Public Administration
All other services
100.0
.6
6.7
2.1
90.6
10.1
.5
.2
19.9
10.9
.7
.3
1.0
.7
2.9
.3
1.4
1.3
.4
6.2
7.8
1.5
6.4
38.0
100.0
.8
6.0-
2.4
90.8
6.6
.6
.2
22.9
11.1
.9
.7
1.6
1.5
2.6
.9
1.3
1.7
.6
5.9
4.9
1.0
4.4
44.3
Sourc-a: U,S. Census of Population, April 1950
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Agricultural Land Use
Table IV shows how the land in farms in the Middle Basin was divided among
the various uses in 1954 and 1959. The type of use employing the greatest
number of acres is harvested cropland. Total land in farms declined slightly
during the five-year period from 1954 to 1959.
Table IV
AGRICULTURAL LAND USE, MIDDLE WILLAMETTE BASIN, 1954 and 19592'
Thousands of Acres
Type of Use 1954 1959
Land in farms, total 1602 1540
Cropland harvested 699 679
Cropland in fallow, etc. 65 97
Land used for pasture:
Cropland uaed for pasture 129 117
Woodland used for pasture 378 271
Pasture land 140 171
Woodland 107 128
Other (roads, house lots, etc.) 84 77
Irrigated acres (included in
above uses) 91 100
_£/ Ii.clud;2s all of Bent on, Linn, Marion, Polk and Yamhill Counties,
Source: U.S. Census of Agriculture, 1959
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The types of crops raised on the "cropland harvested" acres in 1959 are
shown in Table V.
Table V
ACRES OF CROPLAND, BY TYPE OF CROP, MIDDLE WILLAMETTE BASIN, 19595'
Acres,
Type of Crop Thousands
Grains 247
Field seeds 248
Hay 83
Corn for feed 16
Sweet corn 12
Mint for oil 10
Beans (snap) 7
Potatoes 2
Broccoli 1
Dry onions 1
Carrots 1
Hops 4
Berries 11
Orchards 34
Misc. vegetables and other crops 2
Total, Cropland harvested 679
af Includes all of Benton, Linn, Marion, Polk
and Yamhill Counties.
Source: U.S. Census of Agriculture, 1959
ESTIMATED FUTURE GROWTH
Factors Influencing Future Growth
Future growth in the Middle Willamette Basin is likely to be built upon
the following factors:
(1) Agricultural production is expected to increase, due to increased
irrigation and increased productivity, and this will provide the resources
for an increase in food processing manufacturing.
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(2) More complete use can be made of the timber resource. While it is not
anticipated that the total timber harvest will increase, diversification
of secondary manufacturing can increase the value of the products and also
offset declines in employment that might otherwise occur due to rising
labor productivity. It is estimated that wood resources will permit
expansion of pulp and paper capacity to 1,100 tons per day by 1985 and
1,750 tons per day by 2010. Capacity in 1960 was 650 tons per day.
(3) Education and public administration employment are expected to grow
at a somewhat faster rate than the population of the state during 1960-85
and at about the same rate as state population during 1985-2010.
(4) The nucleus of a primary metals industry is well established at Albany
and it is expected that this industry will grow in the future.
(5) As population and the local and regional markets increase, it is
expected that diversified "all other" manufacturing will increase during
the study period. This category increased 4.2 per cent per year in
employment during the period 1950^60 and it is assumed that that rate will
continue during the study period.
Future Employment
On the basis of the preceding assumptions, Table VI shows an illustrative
distribution of future employment, by industry, in the Middle Basin. It
should be emphasized that these are somewhat hypothetical figures, and
are presented in order to show how the labor force would grow if the changes
assumed do occur.
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Table VI
ILLUSTRATIVE DISTRIBUTION OF FUTURE EMPLOYMENT, BY INDUSTRY, MIDDLE WILLAMETTE BASIN
Employment, thousands
Industry
Agriculture
Forestry, fish., mining
Manufacturing
Lumber, wood products
Primary metals
Food and kindred
Printing and publishing
Pulp, paper & allied
All other manufacturing
TOTAL MANUFACTURING
iducation and Public Admin.
x'otal, "Basic" industries
Construction as 7, of Basic
Construction, employment
Total, Construction 4- Basic
All other services as % of
Construction + Basic
All other Services, Employed
TOTAL, EMPLOYED CIVILIAN
LABOR FORCE
Unemployed as % of Emp.C.L.F.
Unemployed, thousands
Military, thousands
Industry not reported as % of
Employed Civilian L.F.
Industry not reported, thous.
1950
16.5
.5
13.6
.1
2.3
1.1
1.0
1.8
19.9
10.5
47.4
13%
6.4
53.8
61%
32.8
86.6
7.0%
6.1
.2
1.4%
1-2
1960
10.2
.7
11.0
.7
3.0
1.4
1.4
2.7
20.2
15.9
47.0
13%
6.3
53.3
72%
38.6
91.9
7.4%
6.8
.6
2.3%
2.1
1985
10
2
11
2
6
3
2
8
32
40
84
13%
11
95
92%
87
182
5.9%
11
2
1.7%
3
2010
10
4
11
4
11
5
3
21
55
68
137
13%
18
155
118%
183
338
5.9%
20
3
1.7%
6
Basis for Projection
No change in number
1950-60 rate—3.4%/yr.
No change in number
1950-60incr .--i-600/dec.
1950-60 rate--2.7%/yr.
1950-60 rate^-2.5%/yr.
Limits of resources
1950-60 rate--4,2%/yr.
Composite of above
For 1960-85, 3.7%=rate
of growth in this
group in U.S. during
1950-60; for 1985-
2010, 2.2%=prejected
rate of growth in
Oregon state pop.
Composite of above
Same ratio as in '50
and '60
Rate of change in this
ratio in U.S. during
1950-60, i.e.,1.070/yr.
Same as US rate in '60
1950-60incr.—+400/dec.
Ave.ratio for '50&'60
TOTAL LABOR FORCE
94.1 101.4 198
367
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On the basis of existing information, it is difficult to anticipate the future
composition of the labor force of the Middle Basin in more detail than that
given in Table VI. However, as an indication of where growth might be expected
to occur, the distribution of the labor force in the Middle Basin in 1960 is
compared with that in the Lower Willamette Basin, the Shenandoah Valley, and
the United States as a whole, in Table VII. The Shenandoah was selected as
being a valley with comparable dimensions in a more mature area. While it
should not be assumed that the employment distribution in a relatively small
s'.-ea such as the Middle Willamette Basin will ever be the same as the distri-
bution in any other discrete area or in the U.S. as a whole, it is nevertheless
noteworthy that employment in the Middle Willamette Basin is far below propor-
tionate employment in the U.S. in the following categories: all durable goods
manufacturing except lumber and wood products; textiles and apparel and .
chemical manufacturing; and military.
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Table VII
COMPARATIVE DISTRIBUTION. OF LABOR :,FORCE, BY INDUSTRY, APRIL 1960
(Per cent of;: Total: Labor^Fp.rce)
Industry
Agri culture
Forestry, fish., mining
Manufacturing, Total
Lumber , wood products
Primary metals
Fabricated metals
Machinery , .n.onrelectr ic
F.lectric machinery
Cther durab les^'
I'cod and kindred
V.'exti.les
Apparel ' and fab . textiles
Print ing-\ anid' publishing
Chemicals '
.Other non-dur. and n.e. c.-='
Construction
Emp. Civilian Labor Forc^
Unemployed
Military
Total Labor Force
Middle
Willamette
Basin !§/
10.1
.7
19.9
10.9
.7
.3
.7
.3
.7
2.9
.2
,1
1.4
.1
1.6S/
6.2
53.7
92_. 7
6.7
.6
100.0
. Lower
Willamette
Basing/
3.0
.4
19.6
3.3
1.3
1.4
1.6
1.4
2.5
2.8
.7
.9
1.6
.5
1.6S/
5.9
65.6
94.5
5.0
.5
100.0
Shenandoah
Valley .£/
15t8
.8
27.7
2.3
.2
.8
.8
.8
2.2
4.6
2.2
4.5
.8
7-P
1.3
8.1
42.6
95.0
4.8
.2
100.0
United
States
6.1
1.0
25.1
1.6
1.8
1.8
2.2
2.1
4.5
2.6
1.4
1.7
1.7
1.2
5.5
54.8
92,5
5.0
2.5
100.0
al Includes all of Benton, Linn, Marion, Polk and Yamhill Counties.
b/ Includes all of Clackamas, Multnomab and Washington Counties.
c/ Includes all of Augusta, Clarke, Frederick, Page, Rockingham, Shenandoah and
Warren Counties. •-..-,
d/ Includes motor vehicles and equipment; other transportation equipment, including
ship building and repair; cement, pottery, glass, concrete, gypsum,, plaster, stone,
and structural clay and their products; professional and photographic equipment and
supplies; and watches and clocks. : j .
&l Included in the 1.6% in the Middle Willamette Basin are 1.3% in pulp and paper.
Included in the 1.67» in the Lower Willamette Basin are 1.3% in pulp and paper.
fj Includes pulp and paper and their products, petroleum refining, footwear, and
petroleum, coal, tobacco, rubber and •leather products. Also in this total is the
"not elsewhere classified" manufactur-ingjA.a. smaljL miscellaneous category.
£/ Includes "industry not reported" category:, representing about 2 or 3 per cent
of the labor force.
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Future Population
Two methods were used to arrive at an estimate of Middle Willamette Basin
population in 1985 and 2010. One method was to allocate to the various basins
of Oregon the population forecast for the state in terms of national population
trends, assuming that past trends in relative growth and in resource develop1-
ment would continue. The other method was to examine the growth trends within
the Middle Basin, including the industries basic to that area and the relation-
ships between the basic and service industries in the Middle Basin, and to
extend those trends into the future. Both of these methods yielded approx-
imately the same result, which suggests not so much that these figures are
reliable forecasts of future population as that they are reasonable figures
to use for design purposes. The figures are 530,000 for 1985 and 980,000 for
2010. In using the first method of estimating, mentioned above, it was
assumed that Oregon population would be 3.05 million in 1985 and 5.26 million
in 2010. In using the second method of estimating, it was assumed that the
labor force, as projected in Table VI, would represent 37.4 per cent of the
population, the average ratio for the years 1940, 1950 and 1960.
An estimated allocation of Middle Basin population among the various sub-basins
is necessary for design purposes. Predictions of future population of such a
small area as a sub-basin could be made with more confidence after detailed
economic base studies of the areas concerned. Such studies are not available at
this time. However, an illustrative and hypothetical distribution of population
which may be adequate for certain design purposes and which is based on what
are regarded as reasonable assumptions is given in Table VIII. The assumptions
underlying this table are as follows:
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016
1. Inasmuch as the projected rate of increase for the entire Middle Basin
during the period 1960-2010 is about twice the growth rate during 1950-60, it
is assumed that all parts of the Middle Basin will participate to some extent
in the population growth. However, it is assumed that those sub-basins which
grew more rapidly than others during 1950-60 will continue to have above^average
growth, and that those which increased at a lower-than-average rate or declined
in population will continue to lag behind the Middle Basin average rate of
growth.
2. Because of the increased rate of growth projected for the entire Basin,
it is assumed that sub-basins which declined in population during 1950-60
will not have a further population decline but will stabilize at about the
1960 level during the 1960-70 decade and then begin to participate in the
Basin's over-all growth. If it is assumed that growth in these areas after 1970
will be at about half the rate for the entire Middle Basin, the growth rate for
1960-85 would average 0.8% per year and for 1985^-2010 1.2% per year. These
rates have been used in Table VIII for the Yamhill, North Santiam, Luckiamute
and Muddy Creek sub-basins, which experienced a population decline during
1950-60.
3. It is assumed that those sub-basins which had no population change or
which grew at a rate of less than 0.5% per year during 1950-60 will grow
during 1960-2010 at a rate equal to half the Basin average, 1.3% per year
during 1960-85 and 1.2% during 1985^2010. This rate has been used in Table VIII
for the Pudding, South Santiam, Santiam Main Stem, Rickreall, Calapooya,
Long Tom, Tualatin and Alsea sub-basins.
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4. It is assumed that those sub-basins which grew during 1950-60 at rates
above the 1950-60 Basin average but substantially below the Basin average
rate projected for 1960-2010 will increase their rates of growth sufficiently
to equal the rate projected for the Basin as a whole, 2.6% for 1960-85 and
2.5% for 1985-2010. These rates have been used in Table VIII for Mill Creek
and Marys sub-basins.
5. The remainder of projected Middle Basin population has been assigned to
the Salem Urban Area and the Willamette Main Stem. The Salem Urban Area had
77 thousand population in 1960, compared with 73 thousand in the area defined
as the Willamette Main Stem. However, the latter grew slightly more rapidly
than the Salem Urban Area during 1950-60. It is assumed that that relative
trend will continue and that by 2010 the populations of the two areas will
be about equal.
In Table VIII, the estimated 1985 and 2010 population of each sub-basin is
given not only in thousands of population but also in terms of the growth
factor which that population would represent over the 1960 population.
Until detailed economic studies are made of specific cities within the
Middle Basin, it may also be assumed that the cities in each sub-basin will
grow at about the same rate as the sub-basin in which they are located. On
this basis, the growth factors in Table VIII may also be applied to the
individual cities in each sub-basin.
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C-18
Table VIII
ILLUSTRATIVE DISTRIBUTION OF ESTIMATED FUTURE MIDDLE WILLAMETTE BASIN POPULATION;
GROWTH FACTORS BY SUB-BASIN, 1985 and 2010
Sub-Basin
Salem Urban Area^'
Willamette Main Stem
Yamhill
Pudding-''
North Santiam
South Santiam
Santiam, main stem
Mill Creek
Rickreall
Luckiamute
Marys
Calapooya
Muddy Creek^/
Long Torn^'
Tualatin^/
Alsea
1985
Population,
thousands
178
174
32
35
11
36
3
11
11
6
15
11
2
1.5
1.5
1.5
Multiple
of 1960
Population
2.3
2.4
1.2
1.4
1.2
1.4
1.5
1.8
1.4
1.2
1,9
1.4
1.3
1.5
1.5
1.5
2010
Population,
thousands
363
364
43
47
15
49
. 4
20
15
8
28
15
3
2
2
2
Multiple
of 1960
Population
4.7
5.0
1.6
1.9
1.6
1.9
2.0
3.3
1.9
1.6
3.5
1.9
2.0
2.0
2.0
2.0
a/ For definition, see footnote to Table I.
b_/ These figures include only the portion of the sub-basin within the
boundaries of the 5-county area defined as the Middle Willamette Basin.
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