Name of Subsidiary

Relationship

1)

MIGC, Inc., a Delaware corporation

Wholly owned subsidiary of Western Gas Resources, Inc.

2)

MGTC, Inc., a Wyoming corporation

Wholly owned subsidiary of MIGC, Inc.

3)

Western Gas Resources - Texas, Inc., a Texas corporation

Wholly owned subsidiary of Western Gas Resources, Inc.

4)

Mountain Gas Resources, Inc., a Delaware corporation

Wholly owned subsidiary of Western Gas Resources, Inc.

5)

Western Power Services, Inc., a Delaware corporation

Wholly owned subsidiary of Western Gas Resources, Inc.

6)

WGR Canada, Inc., a New Brunswick corporation

Wholly owned subsidiary of Western Gas Resources, Inc.

7)

Lance Oil & Gas Company, Inc., a Delaware corporation

Wholly owned subsidiary of Western Gas Resources, Inc.

8)

Mountain Gas Transportation, Inc., a Delaware corporation

Wholly owned subsidiary of Mountain Gas Resources, Inc.

9)

Western Gas Wyoming, L.L.C., a Wyoming L.L.C.

Wholly owned subsidiary of Western Gas Resources, Inc.

10)

Western Gas Resources – Westana, Inc., a Delaware corporation

Wholly owned subsidiary of Western Gas Resources, Inc.

11)

Western Gas Resources – Sand Wash, Inc., a Colorado corporation

Wholly owned subsidiary of Western Gas Resources, Inc.

12)

Rising Star Pipeline Corporation, a Delaware corporation

Wholly owned subsidiary of Western Gas Resources, Inc.

13)

Setting Sun Pipeline Corporation, a Delaware corporation

Wholly owned subsidiary of Western Gas Resources, Inc.

14)

Western Gas Resources Canada Company, a Nova Scotia unlimited liability company

Wholly owned subsidiary of Western Gas Wyoming, L.L.C.