[Sheet 1] Map showing extent of alluvial valley floors and overburden thickness above the Watkins lignite seam, Adams and Arapahoe Counties, Colorado -- [Sheet 2] Isopach map of the Watkins lignite seam, Adams and Arapahoe Counties, Colorado., Photocopy; blue line print., No collective title given on either sheet., "This is a preliminary map subject to revision and is a part of U.S.G.S. Grant 14-08-0001-G-487, a study of the environmental impact of energy resource development in the Denver Basin.", Description based on print version record.
Previously published as a chapter in the 1976 Keystone coal industry manual., Includes bibliographical references (p. 14-15)., Description based on print version record.
Previously published as the Colorado chapter of the 1979 Keystone coal industry manual., Includes bibliographical references (p. 23-24)., Description based on print version record.
prepared for the Division of Disaster Emergency Services, Department of Public Safety; by the Flood Control and Floodplain Management Section, Colorado Water Conservation Board, Department of Natural Resources., "Spring 1989.", Online resource; title from PDF cover (viewed October 2017)
by Riverside Technology, inc., Section I: General Colorado information -- Section II: County specific information, subsections A-G., "08/06/98"--Footer., "July 1998"--Cover., At head of title: Colorado Water Conservation Board., Includes bibliographical references (p. 5-1 to 5-14), Online resource; title from PDF cover (viewed February 2014)
prepared by the Colorado Water Availability Task Force; Impact Task Forces ; presented by the Colorado Water Availability Task Force; Review and Reporting Task Force., "April 14, 2003.", Online resource; title from PDF cover (viewed April 2016)
