MISCELLANEOUS AEROMAGNETIC SURVEYS

IN WESTERN U.S.

Argenta Area, MT:

Line mileage: Approximately 1,230 line miles

Ground clearance: 500 feet above ground level

F/L spacing: 1/5 mile, NW-SE

T/L spacing: 1 mile, NE-SW

Survey boundaries: 112° 45' W to 113° 7'30" W and 45° 5' N to 45° 25' N

Twin Bridges, MT:

Line mileage: Approximately 1,090 line miles

Ground clearance: 500 feet above ground level

F/L spacing: ¼ mile, NE-SW

T/L spacing: 1 mile, NW-SE

Survey boundaries: 112° 15' W to 112°40' W and 45° 32' 30" N to 45° 50' N

Grassy Mountain, OR-ID:

Line mileage: Approximately 11,800 line miles

Ground clearance: 6,000 feet barometric

F/L spacing: 0.75 miles, E-W

T/L spacing: 3 miles, N-S

Survey boundaries: 42° 30' N to 44°00' N and 116° 30' to 118° 30' W

Kyle Hot Springs, NV:

Line mileage: Approximately 586 line miles

Ground clearance: 1,500 feet above ground level

F/L spacing: 0.25 miles, N-S

T/L spacing: 0.5 miles, E-W

Survey boundaries: 40°15' to 40°27' N and 117°47'30" to 117°57'30"W