Engineering-geologic map of the Alaska Highway Corridor, Robertson River to Tetlin Junction, Alaska

The engineering-geologic map is derived electronically, using Geographic Information System (GIS) software, from the surficial-geologic map of the second segment of the proposed natural gas pipeline corridor through the upper Tanana valley, a 12-mi-wide (19.3-km-wide) area that straddles the Alaska Highway through the upper Tanana River valley from the Robertson River eastward to near Tetlin Junction in the Tanacross Quadrangle (Reger and Hubbard, PIR 2009-6A). Surficial-geologic units were initially identified by interpretation of false-color ~1:65,000-scale infrared aerial photographs taken in July 1978, August 1980, and August 1981 and locally verified by field checking in 2007 and 2008. The map shows the distribution...

Tags: Alaska Highway Corridor, Alaska Range, Alaska, State of, Alluvial Deposits, Climate Change, All tags... Colluvial Deposits, Construction Materials, Crushed Gravel, Crushed Rock, Dot Lake, Engineering, Engineering Geology, Floodplain, Floods, Gasline, Geologic Hazards, Geologic Map, Geologic Materials, Icings, Land Subsidence, Landslide, Liquefaction, Materials Site, Permafrost, Proposed Natural Gas Pipeline, Robertson River, Sand & Gravel, Subsidence, Surficial Geology, Tanacross, Tanacross Quadrangle, Taylor Highway, Tok, Tok River, Transportation Corridor, Unconsolidated Deposits, geoscientificInformation, Fewer tags

Engineering-geologic map of the Eagle A-1 Quadrangle, Fortymile mining district, Alaska

The Alaska Division of Geological & Geophysical Surveys (DGGS) has conducted 1:63,360-scale geologic mapping of the Eagle A-1 Quadrangle. The area is part of the 100-year old Fortymile mining district and is located in eastern Alaska near the Alaska-Yukon border. This map illustrates potential near-surface sources of various geologic materials that may be useful for construction. Field observations indicate that each geologic unit (for example, stream alluvium) has a definite composition or range of composition. Therefore, the probable presence of materials is interpreted from the distribution of geologic units on the geologic map of this quadrangle. This map is generalized and is not intended to show exact locations...

Tags: Alluvial Deposits, Alluvium, Boundary (Place), Colluvial Deposits, Colluvium, All tags... Construction Materials, Crushed Gravel, Crushed Rock, Decorative Stone, Drain Rock, Engineering, Engineering Geology, Fortymile Mining District, Geologic Hazards, Geologic Map, Geologic Materials, Ground Ice, Jack Wade Junction, Permafrost, Photogeologic Lineaments, Pingos, Rip Rap, STATEMAP Project, Sand and Gravel, Steele Creek Dome, Taylor Highway, Thawing Permafrost, Top of the World Highway, Unconsolidated Deposits, Walker Fork, geoscientificInformation, Fewer tags

Engineering-geologic map, Alaska Highway corridor, Delta Junction to Dot Lake, Alaska

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.

Tags: Alaska Highway Corridor, Alluvial Deposits, Avalanche, Big Delta, Big Delta Quadrangle, All tags... Colluvial Deposits, Construction Materials, Crushed Gravel, Crushed Rock, Delta Junction, Delta River, Dot Lake, Engineering Geology, Erosion, Floodplain, Floods, Gasline, Geologic Hazards, Geologic Map, Geologic Materials, Glacial Deposits, Icings, Lake George, Land Subsidence, Landslide, Liquefaction, Materials Site, Mount Hayes Quadrangle, Permafrost, Proposed Natural Gas Pipeline, Sand & Gravel, Subsidence, Surficial Geology, Tanana River, Unconsolidated Deposits, Fewer tags