When a major highway runs through the heart of a busy summer destination, improvements require more than technical know-how, they demand careful planning. That’s what Schemmer delivered for the U.S. 71 Pavement Replacement in Okoboji, Iowa.

Each year, thousands of people visit Lake Okoboji and the surrounding Iowa Great Lakes region. With tourism driving the local economy, it was critical to replace 2.55 miles of deteriorating pavement without disrupting the flow of visitors or access to businesses.

Construction Timing and Phasing

To minimize impact, construction was scheduled outside of peak tourism season. All work paused between Memorial Day and Labor Day. This approach required strong coordination with contractors, city officials, emergency services, chambers of commerce, and the Iowa DOT to keep the project moving during limited seasonal windows.

Roadway Improvements

The project included a range of roadway types:

• A four-lane urban section with wide outside lanes and curb and gutter

• A three-lane section near Dam Road to reduce impacts to nearby lakes and businesses

• A five-lane section with a dedicated center turn lane to improve traffic flow

Traffic signals were updated at four intersections, with two new signals added. A fiber optic communication system was installed to link signals and improve corridor-wide traffic management.

Improved Accessibility

Pedestrian access was a key part of the project. Sidewalks were replaced and widened from four to five feet where possible and upgraded to meet ADA standards. The Great Lakes Spine Trail, a key multi-use path in the area, was also widened and replaced to improve accessibility for both residents and visitors.

Environmental Protections

The highway runs between East and West Okoboji Lakes, requiring careful attention to environmental impacts. Sediment control measures were included in the design to protect water quality throughout construction.

Community Involvement

Public input played an important role. During the COVID-19 pandemic, a virtual public meeting was held at the 30% design stage. Additional in-person meetings were held later in the process to share final design details and discuss traffic phasing. Coordination included three cities, local property owners, and other key stakeholders.

Project Benefits

The U.S. 71 improvements balance function, safety, and local character. With thoughtful phasing, enhanced walkability, and long-term investments in infrastructure, the corridor now better supports both year-round residents and the seasonal tourism economy.