Kootenai River Study
Conducted in cooperation with multiple partners
Study Data
Elevation reference mark data
Please see the related report to view site information for survey control stations that were established or updated for use in surveying stream channel cross sections of the Kootenai River between Libby Dam in Montana and Kootenay Lake in British Columbia, Canada.
Stream channel cross-section data files
Find shapefiles and data with the interactive map.
See selected cross-section photos.
Please refer to the related report for further explanation about these maps and the associated data.
Vertical datum conversions from NGVD 29 and NAVD 88
The conversion program VERTCON computes modeled differences in orthometric height between the North American Vertical Datum of 1988 (NAVD 88) and the National Geodetic Vertical Datum of 1929 (NGVD 29) for a given location specified by latitude and longitude. About 382,000 points throughout the United States were used to compute corrections to the model. The root-mean-squared error was computed to be less than 0.07 ft. The VERTCON program was developed by the National Geodetic Survey (NGS) and the National Oceanic and Atmospheric Administration (NOAA).
