The Lower Coast Fork of the Willamette River is the southern-most part of the Willamette. Much of the land is used for agriculture. Damming the river has changed the river. Habitats have changed and flow volume has decreased.

1
Lower Coast Fork Willamette River Lane County,
Oregon
Prepared by Rachel Johnson Patrick Ferrari ES
341
INTRODUCTION The Lower Coast Fork of the
Willamette River is the southern-most part of the
Willamette. Much of the land is used for
agriculture. Damming the river has changed the
river. Habitats have changed and flow volume has
decreased.
Physiography The vegetation in this area is
mostly agricultural. Other common vegetation
types include Douglas Fir, White Oak Forests, and
Regenerating Young Forests. It has an elevation
range of 110 ft at the northern end to 1125 ft in
the southeast. Precipitation ranges from 36- 70
inches per year, but the majority of the
watershed gets 40-52 inches per year. Figures 4.
Quad DRGs 5. Quad DOQs 6. Quad DEMs 7.
Precipitation map 8. Vegetation map

• Watershed Location
• The Lower Coast of the Willamette is located in
  central Lane County. Statewide, it located
  roughly in the middle part of the Willamette
  Valley.
• Figures
• 1. Map of Oregon with watershed location

You can insert images throughout poster
Figure 10 Lower Coast Fork of Willamette River
near Creswell
Figure 7 Precipitation Map

• Conclusions
• The Lower Coast of the Willamette is located in
  central Lane County.
• It contains a total drainage area of 360 sq km.
• The majority of the watershed gets 40-52 inches
  per year.
• The vegetation in this area is mostly
  agricultural. Other common vegetation types
  include Douglas Fir, White Oak Forests, and
  Regenerating Young Forests.
• It has an elevation range of 110 ft at the
  northern end to 1125 ft in the southeast.
• The bedrock of the watershed mostly consists of
  recent alluvium (Qal) and rocks from the Fisher
  or Eugene Formation (Tfe). Other types of
  bedrock include basaltic rock (Tfeb), sedimentary
  and volcaniclastic rocks (Tus), and Marine Eugene
  Formation (Tfee).

Figure 4 Quad DRGs
Figure 8 Vegetation Map
Figure 1 - Map of Oregon with watershed location
General Geology The bedrock of the watershed
mostly consists of recent alluvium (Qal) and
rocks from the Fisher or Eugene Formation (Tfe).
Other types of bedrock include basaltic rock
(Tfeb), sedimentary and volcaniclastic rocks
(Tus), and Marine Eugene Formation
(Tfee). Figures 2. Geologic Map 3. Soil Map
Figure 11 Side channel of the Lower Coast Fork
Figure 6 Quad DEMs
Figure 5 Quad DOQs

• Hydrologic Summary
• The Lower Coast Fork of the Willamette River
  contains a total drainage area of 360 sq km. It
  has a total length of 22.8 km and a total width
  of 22.5 km. The watershed includes 13 subbasins,
  which have an average area of 27 sq km. 1248
  stream segments and tributaries are included in
  the watershed, 632 are first order stream
  segments and 323 are second order stream
  segments.
• Figures
• 9. Watershed outlines and stream overlays

References Cited DRG REO Oregon 7.5-Minute
DRG's Sorted by Quad Name http//www.reo.gov/r
eo/data/DRG_Files/indexes/orequadindex.asp
DEM State of Oregon Geospatial Data
Clearinghouse http//gis.oregon.gov/DAS/EISPD/
GEO/data/dems.shtml WebGIS Resource (7.5 Min
DEMs available) http//www.webgis.com/terr_pag
es/OR/dem75/lane.html Bedrock Geology State
Geologic Maps from the USGS
http//tin.er.usgs.gov/geology/state/state.php?sta
teOR Annual Rainfall/Precipitation USGS
Seamless Data Distribution System (continuous DEM
coverages of US) http//sagemap.wr.usgs.gov/S
earchData.aspx Soils NRCS Soil Data Mart (soil
surveys) http//soildatamart.nrcs.usda.gov/
Vegetation State of Oregon Geospatial Data
Clearinghouse http//gis.oregon.gov/DAS/EISPD/
GEO/alphalist.shtml Roads State of Oregon
Geospatial Data Clearinghouse
http//gis.oregon.gov/DAS/EISPD/GEO/alphalist.shtm
l Streams State of Oregon Geospatial Data
Clearinghouse http//gis.oregon.gov/DAS/EISPD/
GEO/alphalist.shtml DOQs State of Oregon
Geospatial Data Clearinghouse
http//gis.oregon.gov/DAS/EISPD/GEO/data/doq.shtml
DOQ_Downloads OTHER Oregon USGS DRGs from the
Libre Map Project http//libremap.org/data/sta
te/oregon/drg/ Interactive USGS Quad Index Code
Locator Map http//ferm.forestry.oregonstate.e
du/research/gis/t_dem.htm Pictures http//www.wi
llamette-riverkeeper.org/nww1.htm http//www.willa
mette-riverkeeper.org/images/DSCN0675.JPG
Figure 9 Watershed Outline Stream
Overlay