DOUBLE EAGLE PETROLEUM & MINING CORPORATION v. QUESTAR EXPLORATION & PRODUCTION COMPANY

No. 02-265.

78 P.3d 679 (2003)

2003 WY 139

DOUBLE EAGLE PETROLEUM & MINING CORPORATION, a Wyoming corporation; and Wind River Resources, Inc., a Wyoming Corporation, Appellants (Plaintiffs), v. QUESTAR EXPLORATION & PRODUCTION COMPANY, a Texas corporation; Wexpro Company, a Utah corporation; Lance Oil & Gas Company, Inc., a Delaware corporation; and Ultra Resources, Inc., a Wyoming corporation, Appellees (Defendants).

Supreme Court of Wyoming.

October 30, 2003.


Attorney(s) appearing for the Case

Representing Appellant: Mark W. Gifford and Craig, Newman, Casper, WY.

Representing Appellee: Mr. Thomas Reese of Brown, Drew & Massey, LLP, Casper, WY for Questar Exploration & Production Co. & Wexpro Co.; Mr. R. Michael Mullikin of Mullikin, Larson & Swift, Jackson, WY and Gary C. Davenport of McGloin, Davenport, Severson & Snow, Denver, CO for Lance Oil & Gas Co.; and Mr. Gerald Mason of Mason & Mason, P.C., Pinedale, WY and George W. Mueller of Burns, Wall, Smith & Mueller, P.C., Denver, CO for Ultra Resources.

Before HILL, C.J., and GOLDEN, LEHMAN, and VOIGT, JJ., and BROOKS, D.J.


LEHMAN, Justice.

[¶ 1] At issue in this case is the meaning and effect of two assignments of federal oil and gas leases. The assignments both carved out and reserved a 3.125 percent overriding royalty interest in the leases. At trial, the district court found that the assignments were ambiguous and, therefore, considered extrinsic evidence of the parties' intent when entering into the assignments. Ultimately, the district...

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