About Dyer Mountain

Dyer Mountain Ltd. was established to offer Civil and Mechanical Engineering services to clients in Colorado and the world.  Our expertise include Tunnel Engineering, Hydrology and Hydraulics, Water and Air Quality Analysis and Mitigation, Ventilation, Transportation Design and Planning, and Water and Wastewater design   

Stephen Harelson, President of Dyer Mountain, brings over 36 years of experience in heavy civil and mechanical design and construction.  This experience includes 15 years in the private sector, working on a wide variety of projects in both Colorado and Massachusetts, as well as 21 years at the Colorado Department of Transportation (CDOT).  Work at CDOT included the I-70 Mountain Corridor, the Eisenhower Johnson Memorial Tunnel, and culminated by serving as Chief Engineer from October 2019 through January 2023.

Why Dyer Mountain for a name?  Dyer Mountain is a 13,862 foot (4255 meter) peak in the Mosquito Range, immediately east of my hometown of Leadville, Colorado.  The mountain is named for Father John Dyer, a methodist preacher who in the 1860s and 70s, crossed the Mosquito Range frequently for his work-and coincidentally became the first avid cross-country skier in the Colorado Rockies.  My father owned several mining claims on the western flank of Dyer Mountain-Every company has to have a name, and mine is named in honor of both my father and Father Dyer.