EXHIBIT 10.7 [MILLER EXPLORATION COMPANY - LETTERHEAD] May 27, 1999 Mr. C.E. "Gene" Miller Eagle Investment Inc. 3140 Logan Valley Road Traverse City, MI 49685 RE: April 1, 1999 Purchase Letter Agreement Bank of Montreal Credit Agreement Dear Gene, As per that certain Purchase Letter Agreement date April 1, 1999 Eagle Investments, Inc. ("Eagle") agreed to acquire up to $6 million worth of Miller Exploration Company "(MEXP") properties. As a result of the sale by MEXP of certain non-operated properties, Eagle will be required to purchase $2.9 million worth of MEXP properties. Exhibit "A" sets out Eagle's working interest in the specific properties for which it will be acquiring. Eagle's acquisition is subject to the terms and conditions of the April 1,1999 Purchase Letter Agreement, a copy of which is attached. Eagle and MEXP further agree that the following additional terms and conditions will apply to Eagle's acquisition. 1. MEXP will retain all of its rights within the existing producing wellbores at Dry Creek, Moselle, and Centerville Domes. In the event a new well is proposed (other than a substitute well due to, but not limited to mechanical difficulties) in the existing units or the existing well is redrilled to a new bottomhole location, Eagle will have the right to participate for its working interest share. 2. Eagle will have the option to participate for its working interest share in all leasehold acquisitions on the subject domes subsequent to June 1, 1999. 3. Eagle will pay its allocated share of operating and processing expenses and necessary facility enhancement expenses. It is expressly understood that MEXP is not selling any interest in any existing facilities or pipelines. 4. The applicable existing Joint Venture Agreements and Joint Operating Agreements will govern all operations on the subject domes. 5. Eagle will have a restricted license to the proprietary 3-D seismic data covering Richmond, Grange, and Arm Domes. Eagle will have the right to review in MEXP's office, but will not be granted a license on the 3-D seismic data covering the Interdomal, Centerville, Moselle, and Kola Domes and will be subject to the terms and conditions under the applicable license agreements owned by MEXP on these domes. 6. MEXP is currently discussing the sale of additional interest in these prospects under the same terms and conditions to the third parties. In the event MEXP sells this program to a third party for less consideration, Eagle will have the right to participate proportionately for those same terms and condition. Sincerely, MILLER EXPLORATION COMPANY AGREED TO AND ACCEPTED THIS 27th DAY OF MAY, 1999. EAGLE INVESTMENTS INC. BY:/s/ C.E. Miller ------------------------------ C.E. ("Gene") Miller-President -2- Exhibit "A" attached to that certain Letter Agreement dated May 27, 1999 between Eagle Investment, Inc and Miller Exploration Company WI% Eagle's Eagle's Dome County Available Participation WI% - ------------------------------------------------------------------------------- Arm Lawrence 28.33% 42.33% 11.99% Grange Lawrence 28.33% 42.33% 11.99% Kola Covington 20.30% 42.33% 8.59% Richmond Covington 35.00% 42.33% 14.82% Dry Creek Covington 44.58% 42.33% 18.87% Centerville Jones 22.80% 42.33% 9.65% Moselle Jones 50.00% 42.33% 21.17% Interdomal Jones/Covington 50.00% 42.33% 21.17% Don't Covington 25.00% 42.33% 10.58% Eminence Covington 10.00% 42.33% 4.23% 5/25/99 $2.9mm