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Marker Type: Horizontal Control Mark

Survey marks of type: Horizontal Control Mark

Popular Pages

Map of Airway Beacons
Airway Beacons—Western U.S.
Airway Beacons—Eastern U.S.
Local Control Monument Databases
NGS Historical Geodetic Control Diagrams
USGS Datasheets
Resurvey of the Heart of the Grand Canyon

Recent Recoveries

PennDOT (Unstamped, #7)
Z 229
18-35-6011-1
04-35-3020-5
VALLEY FORGE RM 2

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