Dave Sbur has contributed some beautiful photos of Portland—Spokane beacon #12 from his visit to the site.
This former beacon site with a mostly intact arrow was discovered by Herbert Arnold. It appears to have been the site of Beacon #23 on the Los Angeles—Las Vegas Airway.
Thanks to Will Awalt of Jones|Carter, we have some new benchmark data for Texas!
New York USGS datasheets are available. They include some very interesting history!
USGS datasheets for North Carolina are available!