Centuries Research Inc. for the Colorado Division of Minerals and Geology No description specified. 1-2 (2 Records) Documents A Class III Cultural Resource Inventory of Pathfinder Development Inc. 'S Pathfinder Gravel Pit San Miguel County, Co (CRI Project No. 495) (1995) A Class III Cultural Resource Inventory of Western Gravel, Inc. 'S North D-21 (Metcalf No. 1) Gravel Pit, Momtorse County, Colorado (1994)