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EXHIBIT 99.1
AGREEMENT MADE PURSUANT TO RULE 13d-1(f)(1)(iii)
JOINT FILING AGREEMENT
The parties hereto agree that pursuant to Rule 13d-1(f)(1)(iii) of
Regulation 13D promulgated by the Securities and Exchange Commission pursuant to
the Securities Exchange Act of 1934, as amended, the Schedule 13D of which this
Agreement is made an exhibit is filed on behalf of it in the capacity set forth
below.
Date: November 6, 1998 NATURAL GAS PARTNERS II, L.P.
By: G.F.W. Energy II, L.P., its Sole
General Partner
By: GFW II , L.L.C., its Sole General
Partner
By: /s/ Xxxxxxx X. Xxxxx
------------------------------------
Xxxxxxx X. Xxxxx, Authorized Member
Date: November 6, 1998 G.F.W. Energy II, L.P.
By: GFW II , L.L.C., its Sole General
Partner
By: /s/ Xxxxxxx X. Xxxxx
------------------------------------
Xxxxxxx X. Xxxxx, Authorized Member
Date: November 6, 1998 GFW II , L.L.C.
By: /s/ Xxxxxxx X. Xxxxx
------------------------------------
Xxxxxxx X. Xxxxx, Authorized Member
