Answer: USGS survey benchmark data is not yet available on the Internet.
For vertical and horizontal control information on all USGS survey
benchmarks in the eastern U.S., contact the USGS in
Rolla, Missouri, by telephone at 573-308-3500.
For control information on all USGS benchmarks in the western
U.S., contact the USGS in Denver, Colorado, by telephone at 303-202-4400.
MOST survey benchmarks were NOT established by the USGS, but the National
Coast and Geodetic Survey, Silver Spring, Maryland. National Geodetic Survey
benchmark data is available on the Web at
http://www.ngs.noaa.gov ["Data sheets"].
For further assistance, call 301-713-3242 or send e-mail to
infocenter@ngs.noaa.gov | 
