Municipal / Environmental

Bridges & CulvertsRecreational Trails & FacilitiesRoadwaysStorm WaterStreetsStreetscapeWastewaterWater

11th Street East Rehabilitation

When the crippling pavement of a thoroughfare in Dewitt, Iowa required fast action, IIW responded with completing the design and receiving the necessary approvals within three months. This project along 11th Street required additional coordination and federal requirements since it was funded through the American Recovery & Reinvestment Act (ARRA) and administered by the Iowa […]

11th Street West Rehabilitation

IIW worked with the City of Dewitt to extend the life a roadway that served as the only route through the city and a key commercial corridor while additional planning could be completed for a reconstruction. Recognizing that 11th Street West served as an artery to the heart of Dewitt, IIW made special arrangements throughout […]

14th Avenue Reconstruction

From the preliminary design to bidding to construction, IIW provided city leaders with the information and plans needed to improve traffic control and safety at an important intersection in their community. IIW helped the City of Dewitt devise a plan to realign the intersection of 14th Street and 8th Avenue and improve traffic control. The […]

5th Avenue Corridor Reconstruction

Significant improvements to 5th Avenue gave the well-traveled corridor in Dewitt, Iowa, a much-needed facelift that also improved safety and reduced the city’s maintenance costs. Modern and aesthetically pleasing curb and gutter elements replaced a hodge-podge of culverts and impromptu drainage structures. These improvements increased driver safety by better defining the road and significantly reducing […]

6th Avenue Business District Reconstruction

IIW helped transform a downtown business district in DeWitt, Iowa, with the visioning of City, community, and business owners. Together, they developed a plan to reconstruct the 6th Avenue corridor that serves as the front doorway of many downtown businesses. Shoppers Skip & Jump The 17-block corridor, including the downtown business district, was not conducive […]

IA 38 Reconstruction

The IA 38 reconstruction in the City of Stanwood includes approximately 3/4 mile of urban and rural roadway with ADA-compliant sidewalks. The existing roadway was in poor condition due to soft subgrade soils, and poor surface drainage. The City also identified the need to replace both sanitary sewer and water main originally installed around the […]

Peosta Street Roundabout

IIW developed a specialized design for an urban roundabout that could accommodate an exceptionally large load and 19-axle heavy haul trucks in the City of Peosta while providing a gateway to the nearby college campus. IIW modeled the heavy haul trucks turning movements and designed the roundabout to accommodate the large load while still keeping […]

Western Avenue Reconstruction

IIW transformed a once rural stretch of roadway in Maquoketa, Iowa, into an urban street where community members can connect and be active. A new 4-foot sidewalk provides a safe connection from the Platt Street trail to the high school. While the sidewalk may be the most eye-catching change, many of the upgrades to Western […]