This web page allows one to view the movements recorded from instruments installed as part of an investigation of the Debeque Canyon Landslide by the Colorado Geological Survey on behalf of the Colorado Department of Transportation. This ongoing investigation was initiated after major movements damaged Interstate 70 in April of 1998. Movement data on this webpage was recorded from 1999 to 2011.
USE OF THIS PAGE
Ground-movement graphs of the various tools are linked to the annotated oblique aerial image. Clicking on the tool location shown on the annotated image will link to the data.
DeBeque Canyon Landslide photo by J. White
LISTING OF TOOLS
The following tools listed below are available for observation:
Manually-read prisms 1 through 15. These prisms are surveyed by a robotic total station from across the river. The station location was selected so the approximate landslide movement was towards it. The linked prism data is in MS Excel files that include a survey data spreadsheet and scatter graphs that show movements over time.
Manually read inclinometers in borings DLS-2, DLS-3, DLS-4, and GAI-1. This data is shown in graphs generated by Slope Indicator DigiPro software.
Inclinometer readings at borings GAI-4, GAI-6, and GAI-7 are no longer avaiable. Early landslide movements deformed and ultimately sheared the installed inclinometer casing.
COMPARATIVE MOVEMENT SINCE 1999
Open this file to view a comparison of movement magnitudes at the various prisms. The data shown in this file is the cumulative change in raw slope distance, measured directly by laser.
Click on thumbnail below for calculated vectors of prism movements projected on an aerial photograph.
In addition to the above tools, the USGS has provided periodic GPS monitoring of certain survey monuments installed on the landslide. Click the image below to view vector landslide movements based on previous GPS monitoring.