Field station locations and magnetic susceptibility data for the Yukon River Crossing Project, Alaska, collected June-July 2016

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Frequently anticipated questions:


What does this data set describe?

Title:
Field station locations and magnetic susceptibility data for the Yukon River Crossing Project, Alaska, collected June-July 2016
Abstract:
Field station locations and magnetic susceptibility data for the Yukon River Crossing Project, Alaska, collected June-July 2016, Raw Data File 2025-22, provides field observations from bedrock and surficial stations, as well as magnetic susceptibility measurements collected from bedrock samples. In June and July 2016, geologists from the Alaska Division of Geological & Geophysical Surveys (DGGS) conducted fieldwork for the Yukon River Crossing Capital Improvement Project. The work focused on a geologically complex and vulnerable segment of the Trans-Alaska Pipeline and the Dalton Highway. The objective of this work was to better understand the geology and potential for slope instability near the highway crossing of the Yukon River, where a 2012 landslide occurred on a slope west of the bridge's south abutment slope. The study area spans approximately 567 mi2 (1,458 km2) across the Livengood quadrangles D-6, C-6, and the northern portion of B-6. These data are provided as a Raw Data File under an open end-user license and are available on the DGGS website: http://doi.org/10.14509/31726.
Supplemental_Information:
yukon_crossing_stations_data:    Field station data spreadsheet and accompanying data dictionary
  1. How might this data set be cited?
    Hubbard, T.D., Koehler, R.D., Twelker, Evan, Jose, Aleena Merin, Walser, S.L., Crawford, N.E., and Barefoot, J.D., 2025, Field station locations and magnetic susceptibility data for the Yukon River Crossing Project, Alaska, collected June-July 2016: Raw Data File RDF 2025-22, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 2 p.
  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -149.991777
    East_Bounding_Coordinate: -149.155661
    North_Bounding_Coordinate: 65.988161
    South_Bounding_Coordinate: 65.366099
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
    Calendar_Date: 2016
    Currentness_Reference:
    ground condition
  5. What is the general form of this data set?
    Geospatial_Data_Presentation_Form: spreadsheet
  6. How does the data set represent geographic features?
    1. How are geographic features stored in the data set?
      This is a point data set.
    2. What coordinate system is used to represent geographic features?
      Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitudes are given to the nearest 0.0000001. Longitudes are given to the nearest 0.0000001. Latitude and longitude values are specified in decimal degrees. The horizontal datum used is WGS84.
      The ellipsoid used is WGS 84.
      The semi-major axis of the ellipsoid used is 6378137.
      The flattening of the ellipsoid used is 1/298.257223563.
  7. How does the data set describe geographic features?
    rdf2025-022-yukon_crossing_stations_data.csv, rdf2025-022-yukon_crossing_stations_data_dictionary.csv
    Field station data spreadsheet and accompanying data dictionary (Source: DGGS)

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
  2. Who also contributed to the data set?
    This work was made possible through funding from a capital improvement project sponsored by the State of Alaska. We gratefully acknowledge the U.S. Bureau of Land Management, Doyon Limited, Ban O Yeel Kon Corporation, and the U.S. Fish & Wildlife Service for providing the necessary permits to carry out this fieldwork.
  3. To whom should users address questions about the data?
    Alaska Division of Geological & Geophysical Surveys
    Metadata Manager
    3354 College Road
    Fairbanks, AK
    USA

    (907)451-5020 (voice)
    (907)451-5050 (FAX)
    dggspubs@alaska.gov
    Hours_of_Service: 8 am to 4:30 pm, Monday through Friday, except State holidays
    Contact_Instructions:
    Please view our website (https://www.dggs.alaska.gov) for the latest information on available data. Please contact us using the e-mail address provided above when possible.

Why was the data set created?

Alaska depends on the highway crossing of the Yukon River as a vital transportation and infrastructure link that connects remote northern regions and supports both community and industrial operations. To protect the long-term safety and reliability of this strategic corridor, DGGS carried out geologic mapping to evaluate the bedrock and surficial geology near the crossing. Our work helps identify geologic conditions that influence slope stability, anticipate potential hazards, and guide future infrastructure planning, maintenance, and risk mitigation efforts.

How was the data set created?

  1. From what previous works were the data drawn?
  2. How were the data generated, processed, and modified?
    Date: 2016 (process 1 of 1)
    Geologic mapping - DGGS geologists conducted field mapping through direct observation and interpretation at individual stations. They recorded lithologic descriptions, surficial morphology, material characteristics, and geographic coordinates. Magnetic susceptibility measurements were taken at bedrock stations using Terraplus KT handheld meters (models 5, 6, 9, and 10), with each value representing a single SI unit reading from a representative rock surface. Staff used WAAS-enabled Trimble Juno T41/5 GPS devices running ArcGIS for Windows Mobile to record coordinates, typically accurate to within 1 meter. All location data are referenced to the WGS84 coordinate system.
  3. What similar or related data should the user be aware of?
    Koehler, R.D., 2020, Assessment of potentially active faults in the northwestern Livengood Quadrangle, Alaska: Report of Investigation RI 2020-4, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 35 p
    Koehler, R.D., Reger, R.D., Sicard, K.R., and Spangler, E.R., 2013, Yukon River bridge landslide: Preliminary geologic and geotechnical evaluation: Preliminary Interpretive Report PIR 2013-6, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 69 p
    Wolken, G.J., and Wikstrom Jones, K.M., 2019, Photogrammetry-derived digital surface model and orthoimagery of areas near the Dalton Highway, Yukon River Crossing, Alaska: Raw Data File RDF 2019-4, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 5 p

How reliable are the data; what problems remain in the data set?

  1. How well have the observations been checked?
    The accompanying report and data tables provide a comprehensive discussion of processing methods, with errors reported in the tables where applicable. This data is being released as part of the DGGS RDF series, which includes content describing approved techniques and methods for the collection, storage, visualization, analysis, and interpretation of scientific data. While the information has been reviewed by several geologists familiar with the study area, the data and report have not undergone formal review for technical content or conformity to DGGS editorial standards. For inquiries regarding analytical values or procedures, the originating lab is the best point of contact.
  2. How accurate are the geographic locations?
    Staff used Trimble Juno T41/5 WAAS-enabled GPS devices running ArcGIS for Windows Mobile to record geographic coordinates at sample stations. These devices typically report a positional error of about 1 meter. Latitude and longitude values are based on the WGS84 coordinate system.
  3. How accurate are the heights or depths?
  4. Where are the gaps in the data? What is missing?
    This data release is complete.
  5. How consistent are the relationships among the observations, including topology?
    Not applicable

How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?
Access_Constraints:
This report, map, and/or dataset is available directly from the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys (see contact information below).
Use_Constraints:
Any hard copies or published datasets utilizing these datasets shall clearly indicate their source. If the user has modified the data in any way, the user is obligated to describe the types of modifications the user has made. The user specifically agrees not to misrepresent these datasets, nor to imply that changes made by the user were approved by the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys. The State of Alaska makes no express or implied warranties (including warranties for merchantability and fitness) with respect to the character, functions, or capabilities of the electronic data or products or their appropriateness for any user's purposes. In no event will the State of Alaska be liable for any incidental, indirect, special, consequential, or other damages suffered by the user or any other person or entity whether from the use of the electronic services or products or any failure thereof or otherwise. In no event will the State of Alaska's liability to the Requestor or anyone else exceed the fee paid for the electronic service or product.
  1. Who distributes the data set? (Distributor 1 of 1)
    Alaska Division of Geological & Geophysical Surveys
    Metadata Manager
    3354 College Road
    Fairbanks, AK
    USA

    (907)451-5020 (voice)
    (907)451-5050 (FAX)
    dggspubs@alaska.gov
    Hours_of_Service: 8 am to 4:30 pm, Monday through Friday, except State holidays
    Contact_Instructions:
    Please view our website (https://www.dggs.alaska.gov) for the latest information on available data. Please contact us using the e-mail address provided above when possible.
  2. What's the catalog number I need to order this data set? RDF 2025-22
  3. What legal disclaimers am I supposed to read?
    The State of Alaska makes no expressed or implied warranties (including warranties for merchantability and fitness) with respect to the character, functions, or capabilities of the electronic data or products or their appropriateness for any user's purposes. In no event will the State of Alaska be liable for any incidental, indirect, special, consequential, or other damages suffered by the user or any other person or entity whether from the use of the electronic services or products or any failure thereof or otherwise. In no event will the State of Alaska's liability to the Requestor or anyone else exceed the fee paid for the electronic service or product.
  4. How can I download or order the data?

Who wrote the metadata?

Dates:
Last modified: 03-Nov-2025
Metadata author:
Alaska Division of Geological & Geophysical Surveys
Attn: Simone Montayne
Metadata Manager
3354 College Road
Fairbanks, AK
USA

(907)451-5020 (voice)
(907)451-5050 (FAX)
dggspubs@alaska.gov
Hours_of_Service: 8 am to 4:30 pm, Monday through Friday, except State holidays
Metadata standard:
FGDC Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)
Metadata extensions used:

Generated by mp version 2.9.50 on Mon Nov 03 18:02:23 2025