Eklutna River at Glenn Highway Bridge, Alaska Cross-Section Survey, 2016 and 2017

Identification_Information:

Citation:

Citation_Information:

Originator: Curran, Janet H. ORCID 0000-0002-3899-6275
Originator: Beebee, Robin A. ORCID 0000-0002-2976-7294
Publication_Date: 2017
Title:

Geospatial_Data_Presentation_Form: spreadsheet
Publication_Information:

Publication_Place: Anchorage, AK
Publisher: U.S. Geological Survey, Alaska Science Center

Other_Citation_Details:

Suggested citation: Curran, J.H. and Beebee, R.A., 2017, Eklutna River at Glenn Highway Bridge, Alaska Cross-Section Survey, 2016 and 2017: U.S. Geological Survey data release, https://doi.org/10.5066/F7TT4PGD.

Online_Linkage: https://doi.org/10.5066/F7TT4PGD
Larger_Work_Citation:

Citation_Information:

Originator: Conaway, Jeff S.
Publication_Date: Unknown
Title: Hydrologic Data
Geospatial_Data_Presentation_Form: website
Series_Information:

Series_Name: none
Issue_Identification: none

Publication_Information:

Publication_Place: Anchorage, AK
Publisher: U.S. Geological Survey, Alaska Science Center

Online_Linkage: https://alaska.usgs.gov/portal/project.php?project_id=44

Description:

Abstract:

This dataset consists of survey data, plots, photos, and a photo index from a cross section survey of the Eklutna River at the Glenn Highway bridge in Alaska. The cross sections were surveyed in 2016 and 2017 using a total station, then adjusted to match datums for a Municipality of Anchorage orthophoto and Alaska Department of Transportation and Public Facilities bridge as-built elevations.

Purpose:

The purpose of the dataset is to provide a baseline for future comparison of changes in channel elevation in Eklutna River. This dataset supports USGS miscellaneous hydrologic investigations at bridges in Alaska.

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 20160720
Ending_Date: 20170509

Currentness_Reference: ground condition

Status:

Progress: Complete
Maintenance_and_Update_Frequency: None planned

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -149.375746553
East_Bounding_Coordinate: -149.373394115
North_Bounding_Coordinate: 61.450932045
South_Bounding_Coordinate: 61.45016547

Keywords:

Theme:

Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:ASC138

Theme:

Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: inlandWaters

Theme:

Theme_Keyword_Thesaurus: Biocomplexity Thesaurus
Theme_Keyword: Flood plains
Theme_Keyword: Monitoring
Theme_Keyword: Rivers
Theme_Keyword: Stream sedimentation

Place:

Place_Keyword_Thesaurus: Geographic Names Information System
Place_Keyword: Eklutna
Place_Keyword: Eklutna River
Place_Keyword: Lower Eklutna Dam

Place:

Place_Keyword_Thesaurus: None
Place_Keyword: Glenn Highway

Stratum:

Stratum_Keyword_Thesaurus: USGS Biocomplexity Thesaurus
Stratum_Keyword: streams

Access_Constraints: None
Use_Constraints:

It is requested that the authors and the USGS Alaska Science Center be cited for any subsequent publications that reference this dataset. It is strongly recommended that careful attention be paid to the contents of the metadata file associated with these data to evaluate data set limitations, restrictions or intended use.

Point_of_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Janet Curran
Contact_Organization: U.S. Geological Survey, Alaska Science Center

Contact_Address:

Address_Type: mailing and physical
Address: 4210 University Drive
City: Anchorage
State_or_Province: AK
Postal_Code: 99508
Country: USA

Contact_Voice_Telephone: 907-786-7000
Contact_Electronic_Mail_Address: ascweb@usgs.gov

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report: No formal attribute accuracy tests were conducted.

Logical_Consistency_Report: No formal logical accuracy tests were conducted.
Completeness_Report: None
Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

Relative Horzontal and Vertical Accuracy: The accuracy of the survey data relative to other points within the same survey is less than 0.1 ft in the vertical and about 0.1 ft in the horizontal, on the basis of survey instrument accuracy, survey procedures, and field conditions. For comparison between surveys, relative accuracy is reduced to about 0.2 ft in the vertical and 0.5 ft in the horizontal to account for error in adjusting surveys to a common datum. Absolute Horizontal and Vertical Accuracy: The absolute horizontal accuracy of the survey data accounts for errors from estimation of coordinates from an orthophoto and is estimated to be 2 ft. The absolute vertical accuracy of the elevation as adjusted to the as-built datum is about 0.4 ft, which accounts for errors in surveying, survey adjustment, and estimation of bridge deck elevation at the guard rail post relative to published elevations.

Lineage:

Source_Information:

Source_Citation:

Citation_Information:

Originator: Municipality of Anchorage
Publication_Date: 2015
Title: Municipality of Anchorage orthophoto
Geospatial_Data_Presentation_Form: remote-sensing image
Publication_Information:

Publication_Place: Anchorage, AK
Publisher: Municipality of Anchorage

Type_of_Source_Media: online
Source_Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 2015

Source_Currentness_Reference: ground condition

Source_Citation_Abbreviation: Municipality of Anchorage orthophoto
Source_Contribution:

This orthophoto served as the reference dataset for adjusting points that were surveyed in an arbitrary datum to the horizontal datum of the orthophoto. In particular, the location of guard rail posts surveyed in the field were visually estimated from this orthophoto for the purpose of obtaining a best-fit match during the adjustment process.

Process_Step:

Process_Description:

Survey data were collected using a Trimble total station from various instrument locations on July 22, October 20, October 25, and November 3, 2016, and May 9, 2017. Cross section monuments were established near the ends of each cross section to serve as reference marks for future repeat surveys. Detailed descriptions of these and additional monuments are described in the data. Cross section data were obtained in three separate survey files, each including data from one or more instrument locations (TS0; TS1, TS2, TS3; TS4, TS5, TS6).

Process_Date: 2017

Process_Step:

Process_Description:

Survey data was exported from the proprietary Trimble job file to a spreadsheet. To adjust coordinates from the arbitrary datum of each survey to established horizontal and vertical datums, survey data were translated and rotated (horizontal) or translated (vertical) with no scaling or skewing. Survey data from total station instrument locations TS4, TS5, and TS6 as a group were translated and rotated about the downstream bridge left-most guard rail post point using a spreadsheet and the ESRI ArcGIS Rotate tool until they visually matched the 2015 Municipality of Anchorage orthophoto. Surveyed bridge deck elevations were used to adjust the survey to match the Alaska Department of Transportation and Public Facilities bridge as-built elevations. Survey data from TS0, and from TS1, TS2, and TS3 as a group, were each adjusted to match the adjusted TS4 survey using a point in common.

Process_Date: 2017

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Point

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Planar:

Grid_Coordinate_System:

Grid_Coordinate_System_Name: State Plane Coordinate System 1983
State_Plane_Coordinate_System:

SPCS_Zone_Identifier: 5004
Transverse_Mercator:

Scale_Factor_at_Central_Meridian: 0.9999
Longitude_of_Central_Meridian: -150
Latitude_of_Projection_Origin: 54
False_Easting: 1640416.66667
False_Northing: 0

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:

Abscissa_Resolution: 0.001
Ordinate_Resolution: 0.001

Planar_Distance_Units: Foot_US

Geodetic_Model:

Horizontal_Datum_Name: D_North_American_1983
Ellipsoid_Name: GRS_1980
Semi-major_Axis: 6378137
Denominator_of_Flattening_Ratio: 298.257222101

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: Eklutna River at Glenn Highway Bridge USGS Monuments
Entity_Type_Definition:

Table of locations and description of points from a survey of monuments marking cross sections and other reference points at Eklutna River, Alaska.

Entity_Type_Definition_Source: Author defined

Attribute:

Attribute_Label: Point_ID
Attribute_Definition:

Point identfication. Unique identifier that indicates the order in which survey points were collected.

Attribute_Definition_Source: Author defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 193
Range_Domain_Maximum: 611

Attribute:

Attribute_Label: Point_Name
Attribute_Definition:

The point name is an identifier that also provides categorical information about the point. Although the point name may be repeated from different instrument locations, it is a unique identifier within points from a single instrument location. The point name consists of one or more descriptive terms that may be followed by a sequential numbers. Descriptive terms: lb is left bank; rb is right bank; riprap is riprap, or large angular boulders placed for bank protection; xs### is cross section, where ## is cross-section number; us is upstream; ds is downstream; gr is guard rail; nail is nail or screw monument in tree.

Attribute_Definition_Source: Author defined
Attribute_Domain_Values:

Unrepresentable_Domain: Unknown

Attribute:

Attribute_Label: Instrument_ID
Attribute_Definition:

The instrument ID is an identifier for the total station setup number, which uniquely identifies the location of the total station and survey date. Instrument ID consists of the abbreviation "ts" or "TS" for total station, followed by a sequential number.

Attribute_Definition_Source: Author defined
Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: TS1
Enumerated_Domain_Value_Definition: Total station setup 1, used in October 20, 2016 survey
Enumerated_Domain_Value_Definition_Source: Author defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: ts4
Enumerated_Domain_Value_Definition: Total station setup 4, used in November 3, 2016 survey
Enumerated_Domain_Value_Definition_Source: Author defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: TS5
Enumerated_Domain_Value_Definition: Total station setup 5, used in May 9, 2017 survey
Enumerated_Domain_Value_Definition_Source: Author defined

Attribute:

Attribute_Label: Northing_ft
Attribute_Definition:

Northing indicates northward distance from datum origin. Northing is provided as a raw value.

Attribute_Definition_Source: Author defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 2722503.907
Range_Domain_Maximum: 2722771.22
Attribute_Units_of_Measure: feet

Attribute:

Attribute_Label: Easting_ft
Attribute_Definition:

Easting indicates eastward distance from datum origin. Easting is provided as a raw value.

Attribute_Definition_Source: Author defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 1749652.893
Range_Domain_Maximum: 1750042.705

Attribute:

Attribute_Label: Elevation_ft
Attribute_Definition:

Elevation above bridge as-built datum. Elevation is rounded to reflect vertical accuracy.

Attribute_Definition_Source: Author defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 75.91
Range_Domain_Maximum: 98.3
Attribute_Units_of_Measure: feet

Attribute:

Attribute_Label: Point_Description
Attribute_Definition: Narrative describing the monument materials and location.
Attribute_Definition_Source: Author defined
Attribute_Domain_Values:

Unrepresentable_Domain: Unknown

Attribute:

Attribute_Label: Monument_purpose
Attribute_Definition: Categorical term describing the survey point.
Attribute_Definition_Source: Author defined
Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: reference mark
Enumerated_Domain_Value_Definition:

Monument is a general marker used to establish survey instrument location

Enumerated_Domain_Value_Definition_Source: Author defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: XS###marker
Enumerated_Domain_Value_Definition:

Cross section marker, where ### denotes the cross section number

Enumerated_Domain_Value_Definition_Source: Author defined

Detailed_Description:

Entity_Type:

Entity_Type_Label:

Figure 1, Eklutna River at Glenn Highway USGS Monument and Cross Section Locations

Entity_Type_Definition:

Map showing location of survey monuments used in 2016 and 2017 USGS surveys. Background is from a 2015 Municipality of Anchorage orthophoto. Lines connecting cross section monuments are simple straight lines and do not reflect actual points surveyed.

Entity_Type_Definition_Source: Author defined

Detailed_Description:

Entity_Type:

Entity_Type_Label: Eklutna River at Glenn Highway Bridge Cross-Section Survey
Entity_Type_Definition:

Table of locations and description of points from a survey of cross sections of Eklutna River, Alaska.

Entity_Type_Definition_Source: Author defined

Attribute:

Attribute_Label: XS_ID
Attribute_Definition:

Cross section identification. Unique identifier for cross section; consists of abbreviation "XS" for cross section followed by a number. Numbers are ordered from upstream (smallest) to downstream (largest) but do not have a physical meaning.

Attribute_Definition_Source: Author defined
Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: XS10
Enumerated_Domain_Value_Definition: Cross section 10
Enumerated_Domain_Value_Definition_Source: Author defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: XS100
Enumerated_Domain_Value_Definition: Cross section 100
Enumerated_Domain_Value_Definition_Source: Author defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: XS190
Enumerated_Domain_Value_Definition: Cross section 190
Enumerated_Domain_Value_Definition_Source: Author defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: XS200
Enumerated_Domain_Value_Definition: Cross section 200
Enumerated_Domain_Value_Definition_Source: Author defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: XS90
Enumerated_Domain_Value_Definition: Cross section 90
Enumerated_Domain_Value_Definition_Source: Author defined

Attribute:

Attribute_Label: Point_ID
Attribute_Definition:

Point identfication. Unique identifier that indicates the order in which survey points were collected.

Attribute_Definition_Source: Author defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 4
Range_Domain_Maximum: 649

Attribute:

Attribute_Label: Point_Name
Attribute_Definition:

The point name is an identifier that also provides categorical information about the point. Although the point name may be repeated from different instrument locations, it is a unique identifier within points from a single instrument location. The point name consists of one or more descriptive terms that may be followed by a sequential numbers. Descriptive terms: lb is left bank; rb is right bank; xs### is cross section, where ## is cross-section number; us is upstream; ds is downstream; gr is guard rail; nail is nail or screw monument in tree.

Attribute_Definition_Source: Author defined
Attribute_Domain_Values:

Unrepresentable_Domain: Unknown

Attribute:

Attribute_Label: Instrument_ID
Attribute_Definition:

Attribute_Definition_Source: Author defined
Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: ts0
Enumerated_Domain_Value_Definition: Total station setup 0, used in July 20, 2016 survey
Enumerated_Domain_Value_Definition_Source: Author defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: TS1
Enumerated_Domain_Value_Definition: Total station setup 1, used in October 20, 2016 survey
Enumerated_Domain_Value_Definition_Source: Author defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: ts4
Enumerated_Domain_Value_Definition: Total station setup 4, used in November 3, 2016 survey
Enumerated_Domain_Value_Definition_Source: Author defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: TS5
Enumerated_Domain_Value_Definition: Total station setup 5, used in May 9, 2017 survey
Enumerated_Domain_Value_Definition_Source: Author defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: TS6
Enumerated_Domain_Value_Definition: Total station setup 6, used in May 9, 2017 survey
Enumerated_Domain_Value_Definition_Source: Author defined

Attribute:

Attribute_Label: Station
Attribute_Definition:

The station indicates the distance in feet along a measuring tape stretched between cross section monuments, where used. Station was obtained for selected cross sections with monuments that were convenient for attaching a tape and is provided to facilitate re-occupying survey point locations during future surveys

Attribute_Definition_Source: Author defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0
Range_Domain_Maximum: 78
Attribute_Units_of_Measure: feet

Attribute:

Attribute_Label: Northing_ft
Attribute_Definition:

Northing indicates northward distance from datum origin. Northing is provided as a raw value.

Attribute_Definition_Source: Author defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 2722494.89
Range_Domain_Maximum: 2722771.22
Attribute_Units_of_Measure: feet

Attribute:

Attribute_Label: Easting_ft
Attribute_Definition:

Easting indicates eastward distance from datum origin. Easting is provided as a raw value.

Attribute_Definition_Source: Author defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 1749652.893
Range_Domain_Maximum: 1750061.898

Attribute:

Attribute_Label: Elevation_ft
Attribute_Definition:

Elevation above bridge as-built datum. Elevation is rounded to reflect vertical accuracy.

Attribute_Definition_Source: Author defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 72.8
Range_Domain_Maximum: 98.3
Attribute_Units_of_Measure: feet

Attribute:

Attribute_Label: Horz_dist_ft
Attribute_Definition:

Horizontal distance along cross section from left monument. Negative values indicate points left of the monument. Horizontal distance is rounded to refect horizontal accuracy.

Attribute_Definition_Source: Author defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: -10.7
Range_Domain_Maximum: 110.3
Attribute_Units_of_Measure: feet

Attribute:

Attribute_Label: Feature
Attribute_Definition: Categorical term describing the survey point.
Attribute_Definition_Source: Author defined
Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: cross section
Enumerated_Domain_Value_Definition:

Cross section perpendicular to the primary direction of streamflow (except at bridges where it is aligned with the bridge drip line).

Enumerated_Domain_Value_Definition_Source: Author defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: monument
Enumerated_Domain_Value_Definition:

A physical object placed to serve as a marker for location and elevation. Coordinates for points with feature "monument" may be inserted as reference points for cross-section surveys that do not resurvey the monument. Monuments consist of the head of nails or screws placed in trees or marks made on the top of bridge guard rail posts. Monuments are described in a separate file.

Enumerated_Domain_Value_Definition_Source: Author defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: monument, resurveyed
Enumerated_Domain_Value_Definition:

A resurveyed monument. Coordinates for points with feature "monument, resurveyed" were used for computing the horizontal distance along the cross section when the cross section was surveyed using a different survey file than the monument survey. These coordinates should not be inserted as reference points for cross-section surveys that do not resurvey the monument. Monuments are described in a separate file.

Enumerated_Domain_Value_Definition_Source: Author defined

Attribute:

Attribute_Label: Water_surf_ID_and_date
Attribute_Definition:

Designation that survey point was collected at the left or right edge of water (LEW and REW, respectively), followed by date surveyed. Multiple water surfaces are present where bars separate channels.

Attribute_Definition_Source: Author defined
Attribute_Domain_Values:

Unrepresentable_Domain: Unknown

Detailed_Description:

Entity_Type:

Entity_Type_Label:

Figure 2, Eklutna River at Glenn Highway Cross Sections, 2016 and 2017

Entity_Type_Definition:

Plot of Eklutna River at Glenn Highway cross sections surveyed in 2016 and 2017. Scale is consistent between plots. All plots use 4x vertical exaggeration.

Entity_Type_Definition_Source: Author defined

Detailed_Description:

Entity_Type:

Entity_Type_Label:

Ground Photos of Eklutna River at Glenn Highway USGS Monuments and Cross Sections

Entity_Type_Definition:

Photographs of USGS monuments and cross section conditions at the time of survey. Additional metadata detailing date and other information are stored in the metadata associated with each photo.

Entity_Type_Definition_Source: Author defined

Detailed_Description:

Entity_Type:

Entity_Type_Label: Eklutna River at Glenn Highway Bridge Ground Photo Index
Entity_Type_Definition:

Table of filenames and descriptions of ground photos taken during a stream survey at Eklutna River, Alaska.

Entity_Type_Definition_Source: Author defined

Attribute:

Attribute_Label: Photo filename
Attribute_Definition:

The filename is an identifier that also provides categorical information about the photo. The filename consists of "Eklutna_Glenn" followed by the photo date in YYYYMMDD format and a sequential number.

Attribute_Definition_Source: Author defined
Attribute_Domain_Values:

Unrepresentable_Domain: Unknown

Attribute:

Attribute_Label: Cross section identification for photo taken from cross section
Attribute_Definition:

Cross section identification in form of XS###, where ### is the cross section number, for a photo taken from the cross section. Blanks indicate photo was not taken from a cross section.

Attribute_Definition_Source: Author defined
Attribute_Domain_Values:

Unrepresentable_Domain: Unknown

Attribute:

Attribute_Label: Cross section identification for photo taken of cross section
Attribute_Definition:

Cross section identification in form of XS###, where ### is the cross section number, for a photo showing the cross section. Blanks indicate the photo does not show a cross section.

Attribute_Definition_Source: Author defined
Attribute_Domain_Values:

Unrepresentable_Domain: Unknown

Attribute:

Attribute_Label: Monument identification for photo taken from monument
Attribute_Definition:

Monument identification for a photo taken from a monument. Blanks indicate the photo was not taken from a monument.

Attribute_Definition_Source: Author defined
Attribute_Domain_Values:

Unrepresentable_Domain: Unknown

Attribute:

Attribute_Label: Monument identification for photo taken of monument
Attribute_Definition:

Monument identification for a photo showing the monument. Blanks indicate photo does not show a monument.

Attribute_Definition_Source: Author defined
Attribute_Domain_Values:

Unrepresentable_Domain: Unknown

Attribute:

Attribute_Label: View direction
Attribute_Definition: Direction in which photograph was taken
Attribute_Definition_Source: Author defined
Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: left
Enumerated_Domain_Value_Definition:

View is toward left bank as viewed by observer looking downstream

Enumerated_Domain_Value_Definition_Source: Author defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: right
Enumerated_Domain_Value_Definition:

View is toward right bank as viewed by observer looking downstream

Enumerated_Domain_Value_Definition_Source: Author defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: upstream
Enumerated_Domain_Value_Definition: View is looking upstream
Enumerated_Domain_Value_Definition_Source: Author defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: downstream
Enumerated_Domain_Value_Definition: View is looking downstream
Enumerated_Domain_Value_Definition_Source: Author defined

Attribute:

Attribute_Label: Feature shown
Attribute_Definition: Categorical term describing the feature photographed.
Attribute_Definition_Source: Author defined
Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: cross section
Enumerated_Domain_Value_Definition:

photo shows a surveyed cross section of the Eklutna River at the Glenn Highway bridge

Enumerated_Domain_Value_Definition_Source: Author defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: monument
Enumerated_Domain_Value_Definition:

Photo shows a monument established by the USGS for surveying cross sections of the Eklutna River at the Glenn Highway bridge

Enumerated_Domain_Value_Definition_Source: Author defined

Eklutna River at Glenn Highway Bridge, Alaska Cross-Section Survey, 2016 and 2017

Metadata: