Yaggy Colby Associates is a civil engineering consulting firm and has more than 170 employees in three states. It provides services in four areas, including municipal, building and site designing, transportation and land development. It offers a wide range of services, such as park planning and designing, recreation trails, environmental studies, landscape plans, agency permitting and approvals and environmental clearances. The firm s projects include Mason City Industrial Park, Sunset Park Recreational Park, Century Hills Development, Hawthorn Suites, North Iowa Media Center, Gift of Life Transplant House and Marble Rock Water Tower. Founded in 1970, Yaggy Colby Associates is headquartered in Rochester, Minn., with regional offices in Mendota Heights and Hastings, Minn., and Mason City, Iowa and Delafield, Wis.