Metadata: Identification_Information: Citation: Citation_Information: Originator: Reger, R.D. Originator: Solie, D.N. Publication_Date: 200812 Title: Engineering-geologic map, Alaska Highway corridor, Delta Junction to Dot Lake, Alaska Geospatial_Data_Presentation_Form: vector digital data Series_Information: Series_Name: Preliminary Interpretive Report Issue_Identification: PIR 2008-3B Publication_Information: Publication_Place: Fairbanks, Alaska - USA Publisher: State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys Other_Citation_Details: 2 sheets, scale 1:63,360 Online_Linkage: http://dx.doi.org/10.14509/17981 Description: Abstract: The engineering-geologic map, on two sheets, is derived electronically from the surficial-geologic map of the initial segment of the proposed natural gas pipeline corridor through the upper Tanana valley (Reger and others, PIR 2008-3a) using Geographic Information System (GIS) software. Surficial-geologic units were initially identified by interpretation of false-color ~1:63,000-scale infrared aerial photographs taken in July 1978, August 1980, and August 1981 and locally verified by field checking in 2006 and 2007. The map shows the distribution of surficial-geologic and bedrock units grouped genetically with common properties that are typically significant for engineering applications. Purpose: This map is a part of ADGGS's Alaska Natural Gas Pipeline Geology and Geohazards project, mapping the geology, geohazards and resources along the the Alaska Highway between Delta Junction and Dot Lake. The study was done in anticipation of the proposed natural gas pipeline along the Alaska Highway corridor, to further the geologic understanding of the area andas a basis for evaluating geohazards and resources for proposed infrastructure. Supplemental_Information: The layers listed below are present as ArcGIS shape files. To enhance print quality, this publication utilized a vector topography data set. The topography data set is not included with this release. Attribute information for the following layers (entities) is included in this metadata file under the "Entity_and_Attribute_Information" section. A codeset file titled, PIR2008-3B_codeset.pdf, contains the table explaining the properties of each engineering-geologic unit. There are two layers. Each layer is listed and described in detail under its own heading starting "Entity_Type_Label. "Layers include: >eng_geology polygons of surficial-geologic map units >outline outline shape of the study area Time_Period_of_Content: Time_Period_Information: Multiple_Dates/Times: Single_Date/Time: Calendar_Date: 1978 Single_Date/Time: Calendar_Date: 2007 Single_Date/Time: Calendar_Date: 1980 Single_Date/Time: Calendar_Date: 1981 Single_Date/Time: Calendar_Date: 2006 Single_Date/Time: Calendar_Date: 2007 Currentness_Reference: ground condition Status: Progress: Complete Maintenance_and_Update_Frequency: Unknown Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -145.947285 East_Bounding_Coordinate: -143.936074 North_Bounding_Coordinate: 64.126215 South_Bounding_Coordinate: 63.497248 Keywords: Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: Alluvial Deposits Theme_Keyword: Avalanche Theme_Keyword: Colluvial Deposits Theme_Keyword: Construction Materials Theme_Keyword: Crushed Gravel Theme_Keyword: Crushed Rock Theme_Keyword: Engineering Geology Theme_Keyword: Erosion Theme_Keyword: Floodplain Theme_Keyword: Floods Theme_Keyword: Gasline Theme_Keyword: Geologic Hazards Theme_Keyword: Geologic Map Theme_Keyword: Geologic Materials Theme_Keyword: Glacial Deposits Theme_Keyword: Icings Theme_Keyword: Land Subsidence Theme_Keyword: Landslide Theme_Keyword: Liquefaction Theme_Keyword: Materials Site Theme_Keyword: Permafrost Theme_Keyword: Proposed Natural Gas Pipeline Theme_Keyword: Sand & Gravel Theme_Keyword: Subsidence Theme_Keyword: Surficial Geology Theme_Keyword: Unconsolidated Deposits Place: Place_Keyword_Thesaurus: None Place_Keyword: Alaska Highway Corridor Place_Keyword: Big Delta Place_Keyword: Big Delta Quadrangle Place_Keyword: Delta Junction Place_Keyword: Delta River Place_Keyword: Lake George Place_Keyword: Mount Hayes Quadrangle Place_Keyword: Tanana River Place_Keyword: Dot Lake Temporal: Temporal_Keyword_Thesaurus: None Temporal_Keyword: Holocene Temporal_Keyword: Quaternary Temporal_Keyword: Pleistocene Temporal_Keyword: Cenozoic Temporal_Keyword: Tertiary Access_Constraints: This map and/or dataset are 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. 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. Point_of_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys Contact_Position: GIS Data Manager/Cartographer Contact_Address: Address_Type: mailing and physical Address: 3354 College Road City: Fairbanks State_or_Province: AK Postal_Code: 99709-3707 Contact_Voice_Telephone: (907) 451-5029 Contact_Voice_Telephone: (907) 451-5020 Contact_Facsimile_Telephone: (907) 451-5050 Contact_Electronic_Mail_Address: dggspubs@alaska.gov Contact_Instructions: You may view our web site at http://www.dggs.alaska.gov for the latest information on available data. Please e-mail your questions and data requests when possible since our web site and e-mail address will remain current even if our phone number and mailing address change. Data_Set_Credit: This research was supported by Alaska State Capital Improvement Projects funding. The authors gratefully acknowledge the helpful review by De Anne Stevens, and able cartographic assistance by Kyle Obermiller. Native_Data_Set_Environment: ArcGIS 9.+, Adobe Acrobat Reader, and any text editor. Cross_Reference: Citation_Information: Originator: Reger, R.D. Originator: Solie, D.N. Publication_Date: 200809 Title: Reconnaissance interpretation of permafrost, Alaska Highway corridor, Delta Junction to Dot Lake, Alaska Geospatial_Data_Presentation_Form: vector digital data Series_Information: Series_Name: Preliminary Interpretive Report Issue_Identification: PIR 2008-3C Publication_Information: Publication_Place: Fairbanks AK Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 10 p., 2 sheets, scale1:63,360 Cross_Reference: Citation_Information: Originator: Carver, G.A. Originator: Bemis, S.P. Originator: Solie, D.N. Originator: Obermiller, K.E. Publication_Date: 200812 Title: Active and potentially active faults in or near the Alaska Highway corridor, Delta Junction to Dot Lake, Alaska Geospatial_Data_Presentation_Form: tabular digital data Series_Information: Series_Name: preliminary interpretive report Issue_Identification: PIR 2008-D Publication_Information: Publication_Place: Fairbanks AK Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 32 p. Cross_Reference: Citation_Information: Originator: Solie, D.N. Originator: Werdon, M.B. Originator: Newberry, R.J. Originator: Freeman, L.K. Originator: Lessard, R.R. Publication_Date: 200802 Title: Major-oxide, minor-oxide, trace-element and geochemical data from rocks collected in the Alaska Highway corridor, Mount Hayes quadrangle, Alaska in 2006 and 2007 Geospatial_Data_Presentation_Form: tabular digital data Series_Information: Series_Name: Raw-data File Issue_Identification: RDF 2008-2 Publication_Information: Publication_Place: Fairbanks AK Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 23 p. Cross_Reference: Citation_Information: Originator: Reger, R.D. Originator: Stevens, D.S.P. Originator: Solie, D.N. Publication_Date: 200812 Title: Surficial geology, Alaska Highway corridor, Delta Junction to Dot Lake, Alaska Geospatial_Data_Presentation_Form: vector digital data Series_Information: Series_Name: Preliminary Interpretive Report Issue_Identification: PIR 2008-3A Publication_Information: Publication_Place: Fairbanks AK Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 35 p., 2 sheets, scale 1:63,360 Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: Initial reconnaissance field observations were made in 2006, after which surficial geology air-photo interpretations were done. Engineering-geologic map units were derived from the surficial-geologic map (PIR 2008-3A). Physical properties of engineering-geologic map units are interpretive, based on extrapolation from verified localities and from previously published reports and data. Potential geologic hazards are inferred from the typical physical properties of map units, including sediment texture and ground-ice content, and their typical topographic settings. Except for a few test pits, no subsurface investigations or laboratory analyses were performed for this publication. The reader is cautioned that this map is intended only as a general guide, and that unevaluated geologic resources and hazards may be present. Detailed geotechnical investigations should be conducted prior to utilization of any map units for engineering purposes. Logical_Consistency_Report: Polygon topology is present on appropriate coverages Completeness_Report: This dataset includes coverages that contain information about the mapped and interpreted engineering-geologic deposits in the map area. Subsurface data were not available for use in creating this map coverage, other than about 10-15 soil pits dug to depths no more than 1.3 m, observations of exposures in gravel pits, highway cuts, and river banks, and drillhole data from geotechnical reports written by the Department of Transportation and Public Facilities for highway construction projects. No analytical tests were conducted for this report. The table describes engineering propoerties that are generally present in the mapped surficial deposits, but local variations and exceptions are most certainly to be expected. The reader is therefore cautioned that this map is intended only as a general guide, and that unevaluated geologic resources and hazards may be present. Detailed geotechnical investigations should be conducted prior to utilization of any map units for engineering purposes. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: The engineering-geologic map units were derived from the surficial-geologic map (PIR 2008-3A). The surficial-geologic map contacts were first hand-drawn, using a magnifying stereoscope, onto acetate overlays registered to 1:50,000-scale (nominal) prints of digital aerial photographs. The horizontal accuracy of the map unit boundary locations varies due to the scale and interpretive nature of the mapping, but is expected to be accurate to at least 15 m. The 400dpi digital air photos were orthorectified using OrthoMapper 3.6 with an RMS error generally constrained to be less than 4 pixels, equating to approximately 20 m on the ground, although some areas with rugged terrain have larger errors. The individual orthophotos were mosaicked using Erdas Imagine 9.2 and ArcGIS 9. The acetate overlays were individually scanned and orthorectified using OrthoMapper based on the same equations developed for generating the orthophotos. Map unit boundaries were digitized on-screen into ArcGIS from the orthorectified overlays at a scale of approximately 1:25,000, using a combination of a digital USGS topographic 1:63,360-scale map layer (DRG) and the orthophoto mosaic layer to verify the position of the lines. Total horizontal accuracy of the mapped surficial-geologic contacts is thus on the order of 25 m or better, with somewhat lesser accuracy expected in areas of rugged relief. Quantitative_Horizontal_Positional_Accuracy_Assessment: Horizontal_Positional_Accuracy_Value: 25 Horizontal_Positional_Accuracy_Explanation: mapped engineering-geologic contacts Lineage: Source_Information: Source_Citation: Citation_Information: Originator: Kreig, R.A. Originator: Reger, R.D. Publication_Date: 1982 Title: Air-photo analysis and summary of landform soil properties along the route of the Trans-Alaska Pipeline System Geospatial_Data_Presentation_Form: document Series_Information: Series_Name: Geologic Report Issue_Identification: GR-66 Publication_Information: Publication_Place: Fairbanks AK Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 149 p. Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1982 Source_Currentness_Reference: ground condition Source_Citation_Abbreviation: Kreig and Reger, 1982 Source_Contribution: Contains air-photo analysis and landform soil properties for trans-Alaska oil pipeline Source_Information: Source_Citation: Citation_Information: Originator: Pewe, T.L. Originator: Reger, R.D. Publication_Date: 1983 Title: Middle Tanana River valley Geospatial_Data_Presentation_Form: book chapter Series_Information: Series_Name: Guidebook Issue_Identification: Guidebook 1 Publication_Information: Publication_Place: Fairbanks AK Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: in Pewe, T.L., and Reger, R.D., eds., Guidebook to permafrost and Quaternary geology along the Richardson and Glenn Highways between Fairbanks and Anchorage, Alaska, p. 5-45 Larger_Work_Citation: Citation_Information: Originator: Pewe, T.L., ed. Originator: Reger, R.D., ed. Publication_Date: 1983 Title: Guidebook to permafrost and Quaternary geology along the Richardson and Glenn Highways between Fairbanks and Anchorage, Alaska Geospatial_Data_Presentation_Form: document Series_Information: Series_Name: Guidebook Issue_Identification: Guidebook 1 Publication_Information: Publication_Place: Fairbanks AK Publisher: Alaska Division of Geological & Geophysical Surveys Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1983 Source_Currentness_Reference: ground condition Source_Citation_Abbreviation: Pewe and Reger, 1983 Source_Contribution: Contains information about Quaternary geology of Tanana Valley Source_Information: Source_Citation: Citation_Information: Originator: Carter, L.D. Originator: Galloway, J.P. Publication_Date: 1978 Title: Preliminary engineering geologic maps of the proposed natural gas pipeline route in the Tanana River valley, Alaska Geospatial_Data_Presentation_Form: document Series_Information: Series_Name: Open-file report Issue_Identification: OFR 78-794 Publication_Information: Publication_Place: United States Publisher: U.S. Geological Survey Other_Citation_Details: 26 p., 3 map sheets, scale 1:125,000 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1978 Source_Currentness_Reference: ground condition Source_Citation_Abbreviation: Carter and Galloway, 1978 Source_Contribution: engineering geologic maps at 1:125,000 Source_Information: Source_Citation: Citation_Information: Originator: Mason, O.K. Originator: Beget, J.E. Publication_Date: 1991 Title: Late Holocene flood history of the Tanana River, Alaska Geospatial_Data_Presentation_Form: journal article Publication_Information: Publication_Place: United States Publisher: Arctic and Alpine Research Other_Citation_Details: v. 23, no. 4, p. 392-403. Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1991 Source_Currentness_Reference: ground condition Source_Citation_Abbreviation: Mason and Beget, 1991 Source_Contribution: Holocene flooding in Tanana valley Source_Information: Source_Citation: Citation_Information: Originator: Yarie, John Originator: Viereck, Leslie Originator: Van Cleve, Keith Originator: Adams, Phyllis Publication_Date: 1998 Title: Flooding and ecosystem dynamics along the Tanana River Geospatial_Data_Presentation_Form: journal article Publication_Information: Publication_Place: United States Publisher: BioScience Other_Citation_Details: v. 48, no. 9, p. 690-695. Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1998 Source_Currentness_Reference: ground condition Source_Citation_Abbreviation: Yarie and others, 1998 Source_Contribution: Flooding along the Tanana River Source_Information: Source_Citation: Citation_Information: Originator: Reger, R.D. Originator: Stevens, D.S.P. Originator: Solie, D.N. Publication_Date: 200812 Title: Surficial-geologic map, Alaska Highway corridor, Delta Junction to Dot Lake, Alaska Geospatial_Data_Presentation_Form: vector digital data Series_Information: Series_Name: Preliminary Interpretive Report Issue_Identification: PIR 2008-3a Publication_Information: Publication_Place: Fairbanks AK Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 35 p., 2 sheets, scale 1:63,360. Type_of_Source_Media: online Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2008 Source_Currentness_Reference: ground condition Source_Citation_Abbreviation: Reger and others, 2008 Source_Contribution: Source of surficial geologic map from which engineering geology map units were derived Process_Step: Process_Description: Digital cartography- Engineering geologic map polygons were derived from surficial geology map polygons using ArcMap 9.3. The map was then attributed and edited. Process_Date: 2008 Process_Step: Process_Description: Fieldwork - Reconnaissance field work was done in September 2006, and additional fieldwork was done In July-August 2007. In addition to observations from ground traverses, materials properties were observed in several soil pits that were dug using shovels to maximum depth of 1.3 meters and by observations of exposures along river banks and highway cuts. Process_Date: 2007 Process_Step: Process_Description: Interpretation of engineering properites. Mapped surificial-geologic deposits were gouped according to similar egineering-geologic properties. Source_Used_Citation_Abbreviation: Reger and others, 2008 Source_Used_Citation_Abbreviation: Krieg and Reger, 1982 Source_Used_Citation_Abbreviation: Pewe and Reger, 1983 Source_Used_Citation_Abbreviation: Carter and Galloway, 1978 Source_Used_Citation_Abbreviation: Mason and Beget, 1991 Source_Used_Citation_Abbreviation: Yarie and others, 1998 Process_Date: 2008 Process_Step: Process_Description: Metadata creation - Metadata were assembled by D.N. Solie to FGDC Standards using Metavist 1.2, DGGS 7.05, a data entry program for FGDC metadata with XML output. Process_Date: 2008 Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Vector Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Grid_Coordinate_System: Grid_Coordinate_System_Name: Universal Transverse Mercator Universal_Transverse_Mercator: UTM_Zone_Number: 6 Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.999600 Longitude_of_Central_Meridian: -147.000000 Latitude_of_Projection_Origin: 0 False_Easting: 500000.0 False_Northing: 0 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 0.000000001 Ordinate_Resolution: 0.000000001 Planar_Distance_Units: meters Planar_Coordinate_Layer_Name: eng_geology Planar: Grid_Coordinate_System: Grid_Coordinate_System_Name: Universal Transverse Mercator Universal_Transverse_Mercator: UTM_Zone_Number: 6 Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.999600 Longitude_of_Central_Meridian: -147.000000 Latitude_of_Projection_Origin: 0 False_Easting: 500000.0 False_Northing: 0 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 0.000001 Ordinate_Resolution: 0.000001 Planar_Distance_Units: meters Planar_Coordinate_Layer_Name: outline Geodetic_Model: Horizontal_Datum_Name: North American Datum of 1927 Ellipsoid_Name: Clarke 1866 Semi-major_Axis: 6378206.4 Denominator_of_Flattening_Ratio: 294.978698 Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Attribute_Layer_Name: outline Entity_Type_Label: outline.shp Entity_Type_Definition: polygon outlining boundary of map area Entity_Type_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute: Attribute_Label: Shape Attribute_Definition: shape of polygon outlining map boundary Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Unrepresentable_Domain: shape of map area Detailed_Description: Entity_Type: Entity_Attribute_Layer_Name: EngGeol Entity_Type_Label: EngGeol.shp Entity_Type_Definition: engineering geology map unit contacts Entity_Type_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute: Attribute_Label: unit Attribute_Definition: Map unit label shown on map and described in text and codeset.pdf Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Codeset_Domain: Codeset_Name: PIR2008-3B_codeset.pdf Codeset_Source: Alaska Division of Geological & Geophysical Surveys http://www.dggs.alaska.gov/metadata/PIR2008-3B_codeset.pdf Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys Contact_Position: Natural Resource Technician 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_TDD/TTY_Telephone: None available. 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 Web site (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: Preliminary Interpretive Report PIR 2008-3b Distribution_Liability: The State of Alaska makes no express or implied warranties (including warranties of merchantability and fitness) with respect to the character, function, or capabilities of the electronic services 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, any failure thereof, or otherwise, and in no event will the State of Alaska's liability to the requester or anyone else exceed the fee paid for the electronic service or product. Standard_Order_Process: Non-digital_Form: Current publication is available on paper. 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. Fees: Printed publication can be purchased for $31, (contact information below) plus shipping if mailed. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: PDF Format_Version_Number: 1.6 File_Decompression_Technique: No compression applied Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://www.dggs.alaska.gov/pubs/ Digital_Form: Digital_Transfer_Information: Format_Name: ArcGIS Shapefile Format_Version_Number: ESRI ArcGIS 9.x File_Decompression_Technique: No compression applied Digital_Transfer_Option: Offline_Option: Offline_Media: CD-ROM Recording_Format: Joliet Fees: Digital files on CD-ROM are available for $10.00 (contact information below). Scanned images of these products may be viewed online or downloaded for free from the DGGS Web site. Ordering_Instructions: Order 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: Two weeks unless special arrangements are made and an express fee is paid. Technical_Prerequisites: It is suggested that MapInfo users import ESRI shape files (if provided) due to the possibility of data loss when importing Arc Export .e00 files.Please check the MapInfo Web site (http://www.mapinfo.com/) for the latest documentation on importing Arc Export and/or ESRI shape files. Metadata_Reference_Information: Metadata_Date: 20081209 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys Contact_Position: Metadata Manager Contact_Address: Address_Type: mailing and physical address Address: 3354 College Road City: Fairbanks State_or_Province: AK Postal_Code: 99709-3707 Country: USA Contact_Voice_Telephone: 907-451-5039 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 contact us through the e-mail address above whenever possible. Metadata_Standard_Name: FGDC Content Standard for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Access_Constraints: none 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 State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys.