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 […]

Lansing Wastewater Pumping & Treatment Facility

Using the technical expertise of IIW’s engineering team, the City of Lansing upgraded its wastewater treatment system with a newly constructed extended aeration treatment plant (AeroMod) that’s also accompanied by a new administrative and laboratory building on site. The new facility, located adjacent to the Mississippi River, replaced an aging contact stabilization plant. The environmental […]

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 […]

Copper Creek Trail

Creating a mixed-use trail along Copper Creek in Jackson County required IIW to balance a varying design concepts, multiple funding sources and construction administrative tasks. The result is an often-visited 1.83-mile stretch of trail that connects previously existing Copper Creek Trail in Preston to the Jackson County Trail, north of Spragueville. Visitors now stroll across […]

Fayette-Volga River Multi-Use Trail

From design to construction, the IIW team considered all the details to make a 2.6-mile stretch of trail from the City of Fayette into the Volga River State Recreational Area not only ADA accessible, but also a visually appealing asset for the community and nearby university. IIW partnered with both the City of Fayette and […]

IA 32 (NW Arterial) Capacity Improvements

The IA 32 capacity improvement project went beyond the expansion of the roadway to include the integration of new traffic technology, including a fiber optic system, pan-tilt-zoom cameras, stop bar cameras, microwave detection and connection to the traffic control center located in city hall. The roadway improvements included the realignment and addition of left and […]

Matteson Street

This federally funded project led by the IIW team transformed a rural roadway with ditch drainage into an ADA-accessible, urban section with a storm sewer system. Managed through the Iowa Department of Transportation, the project called for a mill and resurface pavement rehabilitation for two blocks and pavement reconstruction for one block. IIW’s team conducted […]

6th Avenue Downtown Streetscape

A desire to create a draw to Downtown Dewitt and improve walkability and safety led city leaders to partner with IIW to complete a streetscape reflective of the community’s heritage and local artistry. IIW engineers provided three design alternatives and the relative costs of each based on the city’s needs and goals. The City chose […]