Location of levees that act as fish passage barriers throughout the lower Columbia River and estuary. The location of levees and roads that act as levees was digitized from LiDAR derived products such as Hillshade and Topographic Position Index Grids. Field work and participatory mapping techniques were used to verify existence of levees as well as to clarify areas where LiDAR use was limited.
To support the Lower Columbia River Estuary Partnership in its efforts to identify and prioritize potential habitat restoration projects in the region, as well as to support its efforts in floodplain hydraulic modeling and assessment of hydrologic impairment conditions in comparision to restoration efforts.
ground condition
None
800 NE Oregon St., Suite 1145
Questions for LCREP should be directed to Keith Marcoe at KMarcoe@lcrep.org.
Work funded by Bonneville Power Administration and contracted by the Lower Columbia River Estuary Partnership.
The data are all line features.
Only analyzed LiDAR within Reach A of lower Columbia River and estuary floodplain.
Data is based on USACE LiDAR. Processes were designed to achieve a horizontal accuracy for unobscured raw point cloud data of less than 30 cm.
Estimated accuracy: RMSE = 0.049 meters absolute accuracy for ground classified points on hard, flat paved surfaces. Ground model accuracy in other terrain conditions will vary.
Location of levee features was digitized from LiDAR derived products such as Hillshade and Topographic Position Index Grids. See source metadata for DEM accuracy information.
Levees label was used to verify the current or historical existence of digitized levees.
Levees label was used to verify the current or historical existence of digitized levees.
Visual confirmation of on-the-ground conditions on the Oregon side of the Columbia River.
Confirmation of wetland types around diked areas.
Verification of digitized levees found through LiDAR analysis. USACE certification status noted in comments field of data base.
Visual confirmation of on-the-ground conditions on the Washington side of the Columbia River.
Verification of digitized levees found through LiDAR analysis.
Verification of digitized levees found through LiDAR analysis. There is no date for this data because projects are digitized as they are added. Many projects, however, are outdated and have been removed, naturally or non, since their addition.
Visual analysis of LiDAR using spatial analysis tools such as the cross-section profile tool and colorized hillshades resulted in heads-up digitized linear features representing dikes and levee. Aerial photography was used in areas where dense vegatation resulted in a lack of data in the DEM.
Questions for LCREP should be directed to Keith Marcoe at KMarcoe@lcrep.org.
Linear features were verified and their attribute data were filled in using USGS Topo maps, Soil Survey maps, the National Wetland Inventory, and other research reports.
Questions for LCREP should be directed to Keith Marcoe at KMarcoe@lcrep.org.
Field work and participatory mapping techniques were used to verify existence of levees as well as to clarify areas where LiDAR use was limited. Field work was done by boat or car. Participatory mapping was done with local experts found through extensive networking with landowners, Watershed Council members, Conservation District members, relevant departments of local government, and local environmental organizations.
Questions for LCREP should be directed to Keith Marcoe at KMarcoe@lcrep.org.
Internal feature number.
ESRI
Feature geometry.
ESRI
The name and contact information (if available) for the local expert or landowner who verified the structure.
Laura Mattison
Jurisdiction where feature is located.
Laura Mattison
Populated from a list of all watersheds in the lower Columbia River floodplain.
Laura Mattison
Nicolai/Wickiup
Laura Mattison
Youngs Bay
Laura Mattison
Skipanon
Laura Mattison
Lower Columbia
Laura Mattison
Scappoose Bay
Laura Mattison
Columbia Slough
Laura Mattison
Johnson Creek
Laura Mattison
Sandy River Delta
Laura Mattison
Willapa
Laura Mattison
Grays/Elochoman
Laura Mattison
Cowlitz
Laura Mattison
Lewis
Laura Mattison
Salmon-Washougal
Laura Mattison
Connected river or stream.
Laura Mattison
Managing agency, organization, or individual
Laura Mattison
Associated Conservation District.
Laura Mattison
Clatsop
Laura Mattison
Columbia
Laura Mattison
West Multnomah
Laura Mattison
East Multnomah
Laura Mattison
Wahkaiakum
Laura Mattison
Cowlitz
Laura Mattison
Clark
Laura Mattison
Underwood
Laura Mattison
Pacific
Laura Mattison
Associated Diking District.
Laura Mattison
Is the structure used for any other function than flood control?
Laura Mattison
yes
Laura Mattison
No
Laura Mattison
If Dual-Use=yes, then choose 'private road', 'county road', 'state road', or 'railroad'.
Laura Mattison
State Road
Laura Mattison
County Road
Laura Mattison
Private Road
Laura Mattison
Railroad
Laura Mattison
General Comments
Laura Mattison
Primary material structure consists of.
Laura Mattison
Primary source for finding the structure.
Laura Mattison
Classification of the structure
Laura Mattison
man-made dike
Laura Mattison
Natural levee
Laura Mattison
Sidecast of significance
Laura Mattison
Historical/removed dike
Laura Mattison
Natural Levee with man-made enhancements
Laura Mattison
Breached Dike
Laura Mattison
Partial or complete barrier to fish/flow?
LCREP
Partial
Laura Mattison
Complete
Laura Mattison
What types of features provide flow access through levee?
LCREP
Has the feature been reviewed and verified with local experts?
LCREP
yes
Laura Mattison
No
Laura Mattison
Length of feature in internal units.
ESRI
800 NE Oregon St., Suite 1145
Data set is not for use in litigation. While efforts have been made to ensure that these data are accurate and reliable within the state of the art, the Lower Columbia River Estuary Partnership (LRCEP) cannot assume liability for any damages, or misrepresentations, caused by any inaccuracies in the data, or as a result of the data to be used on a particular system. LCREP makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty. When reproducing this data set in the form of a printed product, users should include an appropriate citation acknowledging ownership of the data by the Estuary Partnership.
If you need this data in a format other than geodatabase, e-mail Keith Marcoe at kmarcoe@lcrep.org for a PDF.
800 NE Oregon St., Suite 1145
Questions for LCREP should be directed to Keith Marcoe at KMarcoe@lcrep.org.