Erdman Engineering, P.C. serves Northeast Iowa counties of Winneshiek, Allamakee, Clayton, Fayette, Chickasaw, Howard, Bremer, and Floyd with civil engineering and land surveying services since 1955.

Current Projects:
Trout Run Trail, Decorah and Winneshiek County.
The last link in the 11 mile recreation trail loop is the construction of the Trout Run Trail Bridge over Hwy #9.  This is a rendering created by Emily Scali for the Decorah - Trails committee.  Click on the photo to view the progression of construction.

Short Street Improvements, Decorah.

See the "Portfolio" page for updates from the City Engineer.

Our Civil Engineering design services includes the areas of land development, street and lighting, well and water systems, sanitary and storm sewer projects, recreational trail development, airport, and housing and commercial site developments.

Our Land Surveying services include Lot, Boundary and Property Survey, Site Topography, ALTA/ASCM and Construction Site Staking utilizing GPS and Robotic data collection.

Additional Services include GIS mapping and large format scanning, reproduction and printing.