CGA Clapsaddle-Garber Associates, Inc.

Contact Information


Stephanie Rottinghaus


(641) 752-6701



PO Box 754 16 E Main Street, Suite 400
Marshalltown, IA 50158
United States


Clapsaddle-Garber Associates, Inc. (CGA) is a civil engineering and land surveying firm in Ackley, Ames, Cedar Falls, Marshalltown, and Webster City, Iowa. We have provided a full range of quality engineering and land surveying services throughout Iowa since 1959. The CGA team includes Professional Engineers, Licensed Land Surveyors, a Real Estate Broker, and Project Managers. Areas of expertise include construction administration for both public and private clients; residential, commercial, and industrial subdivisions; public, commercial, and private site designs; land surveying and construction staking; right of way acquisition; stormwater studies and management plans; construction testing and observation for public and private clients; studies, planning, and design of traffic, transportation, recreation facilities; aviation services; planning and design of water distribution systems; and planning and design of wastewater collection systems. CGA is your RESPONSIVE engineering firm! Learn more at

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