Durango '67 (CO)

Survey type M-A (magnetic; derived from analog data)
Flown by U.S. Geological Survey
Date flown 04/67
Line spacing 1.6 (km)
Altitude 4420 (m) by barometer measurement
Total distance 4,441 (km)
References
Counties Archuleta - Conejos - Dolores - Gunnison - Hinsdale - La Plata - Mineral - Montezuma - Montrose - Ouray - Rio Grande - Saguache - San Juan - San Miguel
Overlapping surveys

Data: Magnetic (M-A)