La Sal Mountains '55 (UT-CO)

Survey type M-Dz (magnetic; digitized from contour maps)
Flown by U.S. Geological Survey
Date flown 09/55
Line spacing 1.6 (km)
Altitude 3810 (m) by barometer measurement
Total distance 949 (km)
References
Counties Mesa - Montrose - Grand - San Juan
Overlapping surveys

Data: Magnetic (M-Dz)