Identification_Information: Citation: Citation_Information: Originator: Koehler, R.D. Originator: Reger, R.D. Originator: Sicard, K.R. Originator: Spangler, E.R. Publication_Date: 2013 Title: Yukon River bridge landslide: Preliminary geologic and geotechnical evaluation Geospatial_Data_Presentation_Form: ASCII tabular files, report Series_Information: Series_Name: Preliminary Interpretive Report Issue_Identification: PIR 2013-6 Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 69 p. Online_Linkage: http://dx.doi.org/10.14509/25642 Description: Abstract: This report presents the findings of a geologic and geotechnical evaluation of a landslide at the Yukon River bridge (the E.L. Patton Bridge). The Yukon River bridge landslide occurred in fall 2012 between approximately 375 and 575 feet west of the bridge. Although there was no damage to the bridge foundation, the landslide's close proximity to the bridge and concerns over additional failures prompted multiple evaluations, including landslide documentation, drainage assessments, and geotechnical studies. This report was prepared to convey the general characteristics of the rock mass, characteristics of rock discontinuities, and the geomorphic expression of the 2012 landslide in the vicinity of the bridge. We determined that the fractured bedrock and steep slopes in the bridge vicinity are prone to slope failure. However, this assessment should be considered preliminary and should not be used to determine areas of potential future slope instabilities. A significant amount of additional exploration and slope stability analysis is required to fully understand the landslide hazard in the area of the bridge, as well as the potential for reactivation and/or expansion of the 2012 landslide into adjacent slopes. Purpose: This report was prepared to convey the general characteristics of the rock mass, characteristics of rock discontinuities, and the geomorphic expression of the 2012 landslide in the vicinity of the Yukon River bridge. However, this assessment should be considered preliminary and should not be used to determine areas of potential future slope instabilities. A significant amount of additional exploration and slope stability analysis is required to fully understand the landslide hazard in the area of the bridge, as well as the potential for reactivation and/or expansion of the 2012 landslide into adjacent slopes. Supplemental_Information: The geospatial data file provided in this digital data distribution package is a compilation of the manuscript tables 1 and 2. The table headers and data organization have been slightly modified to make the data readily accessible to users who wish to view outcrop locations and descriptions via GIS or other software. The DGGS metadata standard extends the FGDC standard to include elements that are required to facilitate our internal data management. These elements, referred to as "layers," group and describe files that have intrinsic logical or topological relationships and correspond to subdirectories within the data distribution package. The metadata layer provides the metadata, codesets, or other documentation files applicable to all layers. Attribute information for each data layer is described in this metadata file under the "Entity_and_Attribute_Information" section. Data layer contents: >sample-location-details: GPS coordinates and rock mass properties for each outcrop field station. Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2013 Currentness_Reference: ground condition Status: Progress: complete Maintenance_and_Update_Frequency: none planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -149.732431 East_Bounding_Coordinate: -149.720385 North_Bounding_Coordinate: 65.875738 South_Bounding_Coordinate: 65.872301 Keywords: Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: geoscientificInformation Theme: Theme_Keyword_Thesaurus: Alaska Division of Geological & Geophysical Surveys Theme_Keyword: Alluvial Fan Theme_Keyword: Alluvium Theme_Keyword: Coastal and River Hazards Theme_Keyword: Colluvial Deposits Theme_Keyword: Colluvium Theme_Keyword: Drainage Patterns Theme_Keyword: Earthquake Related Hazards Theme_Keyword: Engineering Theme_Keyword: Erosion Theme_Keyword: Fracturing Theme_Keyword: Geological Process Theme_Keyword: Geology Theme_Keyword: Geomorphology Theme_Keyword: Geotechnical Theme_Keyword: Hazards Theme_Keyword: Landslide Theme_Keyword: Loess Theme_Keyword: Permafrost and Periglacial Theme_Keyword: Slope Instability Hazards Theme_Keyword: Surficial Theme_Keyword: Translational Landslide Theme_Keyword: Transportation Corridor Place: Place_Keyword_Thesaurus: Alaska Division of Geological & Geophysical Surveys Place_Keyword: Dalton Highway Place_Keyword: Livengood Quadrangle Place_Keyword: Trans-Alaska Pipeline Place_Keyword: Yukon River 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. Point_of_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: Alaska Division of Geological & Geophysical Surveys Contact_Position: GIS Manager Contact_Address: Address_Type: mailing and physical Address: 3354 College Road City: Fairbanks State_or_Province: AK Postal_Code: 99709-3707 Country: USA Contact_Voice_Telephone: (907)451-5020 Contact_Electronic_Mail_Address: dggsgis@alaska.gov Hours_of_Service: 8 am to 4:30 pm, Monday through Friday, except State holidays Data_Set_Credit: This report presents the findings of a geologic and geotechnical evaluation of a landslide at the Yukon River bridge, conducted by the State of Alaska, Division of Geological & Geophysical Surveys (DGGS) through a reimbursable services agreement with the State of Alaska Department of Transportation & Public Facilities (ADOT&PF). De Anne S. P. Stevens provided a technical review of the report. Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: The attributes listed in this dataset were transcribed from field-data collection sheets. The field-data sheets were also scanned and included as an appendix to the manuscript. The geologic interpretations presented in this report have undergone technical review by a geologist of comparable technical expertise. We incorporated the reviewer's suggestions into the final draft when deemed appropriate. Logical_Consistency_Report: not applicable Completeness_Report: Users should note that this table is a compilation of the information provided in tables 1 and 2 to the manuscript. These tables provide only the outcrop locations and rock mass values. To see all of the outcrop measurements and descriptions, users should refer to the field-data sheets (see Appendix B of the manuscript). Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: We assigned a "station number" to each outcrop discussed in this report. Near the center of each outcrop, we recorded a single GPS waypoint to approximate the location of each "station." A station number (and GPS waypoint) was not recorded for the area between the stations 10 and 11. However, we did record observations in this area. Lineage: Source_Information: Source_Citation: Citation_Information: Originator: Alaska Department of Transportation & Public Facilities (ADOT&PF) Publication_Date: 2003 Title: Alaska field rock classification and structural mapping guide Publication_Information: Publication_Place: Alaska Publisher: State of Alaska Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2003 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Alaska Department of Transportation & Public Facilities (ADOT&PF), 2003 Source_Contribution: geotechnical - geomorphic observations and preliminary interpretation Source_Information: Source_Citation: Citation_Information: Originator: Barton, Nick Publication_Date: 1978 Title: Suggested methods for the quantitative description of discontinuities in rock masses Series_Information: Series_Name: International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts Issue_Identification: v. 15, no. 6, p. 319-368 Publication_Information: Publication_Place: Oxford-New York, International Publisher: Pergamon Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1978 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Barton, Nick, 1978 Source_Contribution: geotechnical - geomorphic observations and preliminary interpretation Process_Step: Process_Description: Geotechnical - geomorphic observations and preliminary interpretation - The Yukon River bridge landslide field review was performed August 25-29, 2013, by Rich Koehler, Karri Sicard, and Eleanor Spangler of DGGS and Richard 'Dick' Reger of Reger's Geologic Consulting. Bedrock outcrops along the base of the Yukon River bluff were inspected for the presence of faults, fractures, shears or weathering zones, and/or other features that could provide information from which to infer subsurface conditions of bedrock farther upslope. Quantitative descriptions of rock mass and discontinuity data are based on the methodology of Barton (1978). Rock mass and discontinuity survey data sheets from the Alaska Field Rock Classification and Structural Mapping Guide (ADOT&PF, 2003) were used to record the field observations. Key rock characteristics that were documented include lithology, color, grain size, field compressive strength, rock mass fabric, block size, and state of weathering. Discontinuity surveys at each outcrop station include information on type of discontinuity, dip, dip direction, persistence, termination, aperture, nature of filling, strength of filling, surface roughness, surface shape, waviness, joint roughness coefficient, and presence of water. Detailed definitions for each of these parameters are provided in ADOT&PF (2003). Discontinuity orientations were measured with a Brunton compass, using standard geologic field techniques. We compiled the field data and LiDAR observations into a preliminary report that summarizes the general characteristics of the rock mass, characteristics of rock discontinuities, and the geomorphic expression of the 2012 landslide and the surrounding area. Source_Used_Citation_Abbreviation: Alaska Department of Transportation & Public Facilities (ADOT&PF), 2003 Source_Used_Citation_Abbreviation: Barton, Nick, 1978 Process_Date: 2013 Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: point Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Geodetic_Model: Horizontal_Datum_Name: World Geodetic System of 1984 Ellipsoid_Name: World Geodetic System of 1984 Semi-major_Axis: 6378137 Denominator_of_Flattening_Ratio: 298.257223563 Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: pir2013-6-sample-location-details Entity_Type_Definition: GPS coordinates and rock mass properties for each outcrop field station. Entity_Type_Definition_Source: Alaska Division of Geological & Geophysical Surveys Entity_Attribute_Layer_Name: sample-location-details Attribute: Attribute_Label: Station_Number Attribute_Definition: Label assigned to identify the station. Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: NULL Enumerated_Domain_Value_Definition: Blank (NULL) field values indicate that this value was not recorded. Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Unrepresentable_Domain: Alphanumeric characters which correlate to field-data collection sheets provided in Appendix B of the manuscript Attribute: Attribute_Label: Latitude Attribute_Definition: Latitude, WGS84 Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: NULL Enumerated_Domain_Value_Definition: Blank (NULL) field values indicate that this value was not recorded. Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 65.87230104 Range_Domain_Maximum: 65.87573804 Attribute_Units_of_Measure: decimal degrees Attribute: Attribute_Label: Longitude Attribute_Definition: Longitude, WGS84 Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: NULL Enumerated_Domain_Value_Definition: Blank (NULL) field values indicate that this value was not recorded. Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -149.732431 Range_Domain_Maximum: -149.720385 Attribute_Units_of_Measure: decimal degrees Attribute: Attribute_Label: Description Attribute_Definition: Description of the station location Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: NULL Enumerated_Domain_Value_Definition: Blank (NULL) field values indicate that this value was not recorded. Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Unrepresentable_Domain: A station number (and GPS waypoint) was not recorded for area between the stations 10 and 11. However, we did record observations in this area. Attribute: Attribute_Label: Lithology Attribute_Definition: Description of the rock type Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Unrepresentable_Domain: Free text, terminology is generally consistent with: Neuendorf, K.K.E., Mehl, J.P., Jr., and Jackson, J.A., ed., 2005, Glossary of Geology: American Geological Institute, 799 p. Attribute: Attribute_Label: Color Attribute_Definition: Color of the rock, a delimited list of options is provided in data sheet template. Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Codeset_Domain: Codeset_Name: Alaska field rock classification and structural mapping guide, rock mass description data sheet Codeset_Source: Alaska Department of Transportation & Public Facilities (ADOT&PF), 2003, Alaska field rock classification and structural mapping guide: State of Alaska, ADOT&PF Geotechnical Procedures Manual, 31 p. Attribute: Attribute_Label: Grain_Size Attribute_Definition: Color of the rock, a delimited list of options is provided in data sheet template. Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Codeset_Domain: Codeset_Name: Alaska field rock classification and structural mapping guide, rock mass description data sheet Codeset_Source: Alaska Department of Transportation & Public Facilities (ADOT&PF), 2003, Alaska field rock classification and structural mapping guide: State of Alaska, ADOT&PF Geotechnical Procedures Manual, 31 p. Attribute: Attribute_Label: Compressive_Strength Attribute_Definition: General assessed compressive strength of rock at the station, classification parameters and a delimited list of options are provided in data sheet template. Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Codeset_Domain: Codeset_Name: Alaska field rock classification and structural mapping guide, rock mass description data sheet Codeset_Source: Alaska Department of Transportation & Public Facilities (ADOT&PF), 2003, Alaska field rock classification and structural mapping guide: State of Alaska, ADOT&PF Geotechnical Procedures Manual, 31 p. Attribute: Attribute_Label: Weathering Attribute_Definition: State of weathering, a delimited list of options is provided in data sheet template. Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Codeset_Domain: Codeset_Name: Alaska field rock classification and structural mapping guide, rock mass description data sheet Codeset_Source: Alaska Department of Transportation & Public Facilities (ADOT&PF), 2003, Alaska field rock classification and structural mapping guide: State of Alaska, ADOT&PF Geotechnical Procedures Manual, 31 p. Attribute: Attribute_Label: Fabric Attribute_Definition: General pattern of discontinuities throughout the outcrop, a delimited list of options provided is in data sheet template. Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Codeset_Domain: Codeset_Name: Alaska field rock classification and structural mapping guide, rock mass description data sheet Codeset_Source: Alaska Department of Transportation & Public Facilities (ADOT&PF), 2003, Alaska field rock classification and structural mapping guide: State of Alaska, ADOT&PF Geotechnical Procedures Manual, 31 p. Attribute: Attribute_Label: Block_Size Attribute_Definition: General size of the rock blocks that are defined by outcrop fabric; classification parameters and a delimited list of options are provided in data sheet template. Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Codeset_Domain: Codeset_Name: Alaska field rock classification and structural mapping guide, rock mass description data sheet Codeset_Source: Alaska Department of Transportation & Public Facilities (ADOT&PF), 2003, Alaska field rock classification and structural mapping guide: State of Alaska, ADOT&PF Geotechnical Procedures Manual, 31 p. Attribute: Attribute_Label: Num_Discontinuity_Sets Attribute_Definition: Discontinuity is a collective term used here to describe breaks in the outcrop surface; these may include: joints, fractures, bedding planes, rock cleavage, foliation, shear zones etc. This value provides a count of intersecting discontinuities found at each outcrop. Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Codeset_Domain: Codeset_Name: Alaska field rock classification and structural mapping guide, rock mass description data sheet Codeset_Source: Alaska Department of Transportation & Public Facilities (ADOT&PF), 2003, Alaska field rock classification and structural mapping guide: State of Alaska, ADOT&PF Geotechnical Procedures Manual, 31 p. Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: Alaska Division of Geological & Geophysical Surveys Contact_Address: Address_Type: mailing and physical Address: 3354 College Road City: Fairbanks State_or_Province: AK Postal_Code: 99709-3707 Country: USA Contact_Voice_Telephone: (907)451-5020 Contact_Facsimile_Telephone: (907)451-5050 Contact_Electronic_Mail_Address: dggspubs@alaska.gov Hours_of_Service: 8 am to 4:30 pm, Monday through Friday, except State holidays Contact_Instructions: Please view our website (http://www.dggs.alaska.gov) for the latest information on available data. Please contact us using the e-mail address provided above when possible. Resource_Description: PIR 2013-6 Distribution_Liability: 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. Standard_Order_Process: Non-digital_Form: DGGS publications are available as free online downloads or you may purchase paper hard-copies or digital files on CD/DVD or other digital storage media by mail, phone, fax, or email from the DGGS Fairbanks office. To purchase this or other printed reports and maps, contact DGGS by phone (907-451-5020), e-mail (dggspubs@alaska.gov), or fax (907-451-5050). Payment accepted: Cash, check, money order, VISA, or MasterCard. Turnaround time is 1-2 weeks unless special arrangements are made and an express fee is paid. Shipping charge will be the actual cost of postage and will be added to the total amount due. Contact us for the exact shipping amount. Fees: Contact DGGS for current pricing Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: ASCII tabular files Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://dx.doi.org/10.14509/25642 Fees: Free download Metadata_Reference_Information: Metadata_Date: 20131029 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: Alaska Division of Geological & Geophysical Surveys Contact_Position: Metadata Manager Contact_Address: Address_Type: mailing and physical Address: 3354 College Road City: Fairbanks State_or_Province: AK Postal_Code: 99709-3707 Country: USA Contact_Voice_Telephone: (907)451-5020 Metadata_Standard_Name: FGDC Content Standard for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Use_Constraints: If the user has modified the data in any way they are obligated to describe the types of modifications they have performed in the supporting metadata file. User specifically agrees not to imply that changes they made were approved by the Alaska Department of Natural Resources or Division of Geological & Geophysical Surveys. Metadata_Extensions: Online_Linkage: http://www.dggs.alaska.gov/metadata/dggs.ext Profile_Name: dggs metadata extensions