Deere & Ault Consultants, Inc. (D&A) is an engineering firm specializing in water resources, civil, geotechnical, and tunneling engineering. The firm's main office is located in Longmont, Colorado with a branch office in Andover, Massachusetts . D&A was incorporated in the State of Colorado in February 2005. Although the firm is relatively new, its core staff has worked together for many years while employed with another engineering firm.

D&A presently has 27 employees, including water resource engineers, civil engineers, geotechnical engineers, tunneling engineers, and engineering geologists, all with extensive experience. Our professionals are supported by a staff of dedicated personnel, including Computer Aided Design and Drafting (CADD) operators, IT experts, field technicians, and secretarial support staff.

The primary focus of our business is the development of water supply and other water related projects, including all of the various engineering support of these projects such as water rights analyses, planning, modeling, feasibility investigations, permitting, design, and construction engineering.

D&A has provided services to municipalities, water districts, ditch and reservoir companies, engineering firms, and commercial entities. A summary of the services we provide is shown below: