CheyenneGeolocation: 41.1314, -104.8302

Terracon's Cheyenne office has provided engineering services since 1972. Our professional and field staff routinely work on projects throughout Wyoming. Our office is often a project center providing a full range of materials engineering and testing, geotechnical engineering, and environmental engineering services. The Cheyenne office specializes in Alkali-Silica Reactivity testing (ASR), and the environmental department has expertise in solid waste management.

1505 Old Happy Jack Rd.
Cheyenne, WY 82001

Phone: (307) 632 9224
Fax: (307) 635 5756




Zachary St. Jean, P.E., P.G., Office Manager
Annette Stiles, CSR

Key Projects

Frontier Refining Office BuildingGeolocation: 41.14, -104.8202
Terracon was selected to provide geotechnical engineering and con-struction materials engineering and testing services for the new Frontier Refining office building. In addition to the office building, the project involved a parking lot, abandonment of existing utilities, and installation of new utilities. Terracon's services included geotechnical exploration and evaluation; recommendations for basement foundations, including lateral earth pressures, soil bearing capacity, and settlements; recommendations for permanent foundation and basement dewatering; construction dewatering…

Laramie County Central LibraryGeolocation: 41.14, -104.8202
Terracon performed the initial geotechnical feasibility/site selection study for the new county library and the final geotechnical exploration and engineering evaluation for the selected site at Pioneer Avenue and West 22nd Street. For the final geotechnical study, Terracon performed a total of 12 soil borings, ranging in depths from 6 to 62 feet, to determine the subsurface conditions within the proposed building and car parking areas. Based on the soil subgrade conditions encountered, detailed geotechnical design recommendations were provided for deep foundations to support the heavy…

Overland Pass PipelineGeolocation: 38.0809, -97.9118
Terracon served as the geotechnical consultant for the natural gas liquids (NGL) pipeline project, a $450-million, 750-mile long, 14 and 16-inch pipeline, and associated pumping stations. The pipeline originates in Opal, Wyo., and traverses the I-80 corridor across southern Wyoming, then northeastern Colorado and central Kansas to one of the nation's primary NGL supply and storage hubs in Conway, Kan. Terracon provided geotechnical field investigations and laboratory testing for horizontal directional drilling of significant river, stream and roadway crossings, including geotechnical…