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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
During the 2006 and 2007 field seasons, geologic features indicative of possible youthful surface faulting in or near the Alaska Highway corridor between Delta Junction and Dot Lake were identified by helicopter and fixed-wing air reconnaissance, augmented by interpretation of stereo air photos, remotely sensed images, and aeromagnetic and electromagnetic (EM) datanction to the eastern boundary of the Mt. Hayes Quadrangle. The largest of these faults is the previously unrecognized Dot "T" Johnson fault, a major west-trending, south-dipping thrust fault bordering the northern margin of the Alaska Range along the south side of the Tanana River valley. Two other faults identified as active in this study, the Canteen...
Tags: Alaska Highway Corridor,
Alaska Pipeline,
Big Delta,
Big Delta Quadrangle,
C14, All tags...
Delta Junction,
Delta River,
Dot Lake,
Faulting,
Faults,
Geologic Hazards,
Mount Hayes Quadrangle,
Strike-Slip,
Structural Geology,
Structure,
Tanana River,
Thrust,
Transportation Corridor, Fewer tags
In advance of design, permitting, and construction of a pipeline to deliver North Slope natural gas to out-of-state customers and Alaska communities, the Division of Geological & Geophysical Surveys (DGGS) has acquired lidar (Light Detection and Ranging) data along proposed pipeline routes, nearby areas of infrastructure, and regions where significant geologic hazards have been identified. Lidar data will serve multiple purposes, but have primarily been collected to (1) evaluate active faulting, slope instability, thaw settlement, erosion, and other engineering constraints along proposed pipeline routes, and (2) provide a base layer for the state-federal GIS database that will be used to evaluate permit applications...
Tags: Alaska Highway Corridor,
Alaska Pipeline,
Alaska, State of,
Big Delta Quadrangle,
Digital Surface Model (DSM), All tags...
Gasline,
Geomorphology,
Lidar,
Mean Vegetation Elevation (DSM),
Proposed Natural Gas Pipeline,
Raster Image,
Remote Sensing,
Trans-Alaska Pipeline,
Vegetation Metric,
geoscientificInformation, Fewer tags
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