I believe those leases are blank on the maps I did are leases listed as "Land offered but not leased since 1982".

The serial numbers that came up are "Leased land that has not produced"

The only difference is tha some of the leses on the Rocky Mountain front have produced while the lease in the Flathead National Forest have not. .
----End of Kate's Notes

This is taken from http://www.ewg.org/oil_and_gas/dataindex.php?fips=30000&data=land

Lands leased in Montana

The federal government has offered 26.1 million acres of public and private land in Montana for oil and gas drilling, according to an EWG analysis of land use records maintained by the federal government from 1982 to the present. This acreage represents the sum of total land actively leased in 1982 and land newly offered from 1982 through 2004.

Montana ranks 4th among 12 western states for lands currently leased, and 5th for the amount of land currently producing oil and gas. For total lands held under lease, the top three counties in the state are Flathead County, Phillips County, and Powder River County. The top three companies holding leases in the state are Nance Petroleum Inc, Devon Energy Corporation, and ConocoPhillips.

Despite the vast offering of lands offered to the oil and gas industry across the West, government studies show that the U.S. remains increasingly and inevitably dependent on foreign energy, a trend that will not change until we invest in energy efficient and homegrown renewable power. Tables below detail oil and gas industry holdings in Montana.

Type of Land Public
Land
(acres)
Private
Land
(acres)
Total
Land
(acres)
Total Land Area: N/A N/A 92,254,028
Public land open for leasing: 23,672,337 N/A 23,672,337
Leased or offered since 1982: 19,113,568 6,965,204 26,078,771
 Leased in 1982: 9,743,684 5,398,280 15,141,964
 Offered since 1982: 9,369,883 1,566,924 10,936,807
Produced oil or gas since 1982: 691,231 699,285 1,390,517
Currently leased: 2,466,017 1,744,782 4,210,799
Currently producing oil or gas: 324,245 450,191 774,436
Lessees on currently active leases: 436 909 1,116

NOTE:"Public land open for leasing" reflects the total area of federal public land in 12 western states less lands that are nearly always restricted from leasing and drilling regardless of administration policies or local land use plans — National Parks, Wilderness, National Monuments, Forest Service Recreation Areas, Military Reservation, National Fish and Wildlife Refuges, and National Recreation Areas.

Source: EWG analysis of leasing and drilling records in 12 western states, contained in the Bureau of Land Management's Land and Mineral Records 2000 database, acquired by EWG May 15 2004.


Source http://www.ewg.org/oil_and_gas/dataindex.php?fips=30029
Source: EWG analysis of leasing and drilling records in 12 western states, contained in the Bureau of Land Management's Land and Mineral Records 2000 database, acquired by EWG May 15 2004.

Breakdown of active leases by county

County Number of
Lease
Holders
Number of
Leases
Acres Currently
Leased
Flathead County 64   412   795,164  
Lake County 30   72   131,639