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1: Executive Summary

2: About Oil/Gas Leases

3: Oil & Gas Impacts

4: Bush Admin Rollbacks

5: The Spin on Drilling

6: Hotspot: Roan Plateau, CO

7: Hotspot: Otero Mesa, NM

8: Hotspot: Rocky Mtn Front, MT

9: Hotspot: Powder River Basin, WY

10: Hotspot: Book Cliffs, UT

11: Oil, Gas, Political Cash

12: EWG Recommendations

13: Methodology

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Atlas of Active Leases

Regional Summaries




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Who Owns The West?

Pennaco Energy Inc
1400 16th St #510
Denver, CO 80202

Ranks #29 out of 8,608 active lessees in 12 Western US states, based on total acres leased.

Active Leases held by Pennaco Energy Inc and its subsidiaries

Leases: Current Leases | Leases held since 1982 | PAC contributions | Production

Region Current Leases  
Leases Acres
The United States (ranks #29 of 8,608) 262  280,366  39,536  
 Montana (ranks #10 of 1,116) 103  142,596  0  
  Big Horn County 48  58,501  0 map
  Powder River County 55  84,094  0 map
 Wyoming (ranks #33 of 3,618) 159  137,770  39,536  
  Campbell County 80  50,763  24,843 map
  Johnson County 11  14,351  12,059 map
  Sheridan County 68  72,657  2,634 map

NOTE: EWG's estimates of leases that are currently producing oil or gas are constrained by the accuracy of information in BLM's Land and Mineral Records 2000 database, and may represent an overestimate. We have identified cases for which BLM has failed to enter the data necessary to identify particular leases on which production has ceased. An EWG request for more accurate production data is currently being processed by the Department of the Interior.

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.

Production of oil and gas by Pennaco Energy Inc

Year Oil Produced Gas Produced
BarrelsConsumed in1000
cubic feet
Consumed in
19990(less than a second)2,335(3.3 seconds)
20000(less than a second)674,833(15 minutes)
20010(less than a second)3,890,618(92 minutes)
20020(less than a second)6,805,945(2.6 hours)
20030(less than a second)5,682,305(2.3 hours)
Total*0(less than a second)17,056,036(79 minutes (avg per year))

NOTE: Production information includes oil and gas production for both the parent company and its subsidiaries. A listing of subsidiaries is included below.

* Consumption rates listed in table reflect national average consumption during the entire available period of record for oil and gas production on western lands (typically 1989 through 2003). Consumption rates were compiled by EWG from U.S. Department of Energy data.

EWG analysis of oil and gas production data contained in Oil and Gas Operations Report 1989-2003 database, Minerals Management Service, received August 16 2004 in response to Freedom of Information Act request filed by EWG

Political contributions from individuals, PACs, soft money associated with Pennaco Energy Inc

Contributions Election Cycle
2000 2002 2004 2000-2004
Total $1,000 $445,068 $225,883 $671,951
Republicans $1,000 $329,143 $182,783 $512,926
Democrats $0 $115,925 $0 $159,025

Source: Environmental Working Group analysis of federal campaign contribution data compiled by Center for Responsive Politics.

Information on subsidiaries and parent companies shown here represents our best estimate of corporate structure at the time of this website release, and are drawn from various publicly available sources. Please report any noted omissions and errors to EWG with a credible source or citation. Thank you.