As one of the largest companies in Colorado that self-performs civil construction, asphalt and concrete, including a company-owned fleet of heavy equipment, over 300 full-time field employees and a management and estimating team with over a century of combined expertise. ESI brings together a quality product thats built to last for commercial, municipal and federal projects. Today ESI provides underground utility and pipe installation, earthwork, asphalt paving (mill and overlay, and new paving), grading and site concrete and general contracting services. ESIs management and estimating team has over 140 years of combined experience in heavy civil construction. The company is proud to offer one of the newest and most technologically advanced equipment fleets operated by personnel who are fully trained with the most current industry and safety standards.