CGA provided planning, survey, design, and construction services for three connective projects which contained federal funds and followed the Iowa DOT’s Project Development Schedule. Two of the projects were 10-foot wide trail segments constructed of 4” thick asphalt with 2-foot wide grass shoulders.

The first phase connected two segments of the trail system within the City of Marshalltown along an existing dike on the north side of Linn Creek. CGA worked closely with the U.S. Army Corps of Engineers to reconstruct the dike to allow room for the trail on the mile-long project.

The second phase extended the city’s trail system 2.3 miles to the west to connect to Marshall County Conservation Board’s Grimes Farm & Conservation Center. CGA staff acquired and prepared the required Plats for the needed right of way for the entire corridor.

The final phase of the project was a 10-foot wide PCC trail.

The project ran through a dense timber area between Linn Creek and the Union Pacific Railroad, required two 12’ x 115’ prefabricated bridges over Linn Creek, and armored a portion of the Linn Creek channel to accommodate the trail. CGA administered both design and construction of the project and coordinated between the City of Marshalltown, Marshall County, and the adjacent property owners.

Download the Project Summary

Phase three update