L-3I Repeater Station

The actual equipment at an L-3I repeater station is installed underground in a concrete vault. For the safety and comfort of technicians performing maintenance, there is a distinctive metal shed above ground. In many cases today, the shed has been removed, leaving only the concrete foundation and hatch into the vault (universally welded shut).

L-3I repeater stations can be located by the yellow (often faded to white), arrow-shaped marker signs placed by the nearest major road to help technicians locate them. These signs have black lettering with the repeater designation, a three-character code like “L3W,” and point the way towards the station

These photos are from a station abandoned with its door open in New Mexico.