Sioux City Promenade

Sioux City Promenade

Sioux City, IA

Situated along historic 4th Street in the heart of downtown Sioux City, Iowa, the Promenade is a public space adjacent to the local movie theatre and Sioux City Convention Center, and surrounded by nearby coffee shops, bars, and restaurants. Home of the popular Fridays on the Promenade and Awesome Biker Nights, the Promenade brings many residents downtown and serves as the City’s cultural and community epicenter. However, in recent years, the Promenade’s shine had begun to fade. Frequent use during the spring, summer, and fall for popular street events had worn on the relatively dated site paving and hardscapes over the decades.

In 2016, the City set out to find a design and engineering partner to help address these compounding issues, and to take proactive actions to preserve the still wildly popular Promenade. The City and ISG proudly opened a revitalized Sioux City Promenade to the public the following fall – a Promenade that offers enhanced educational, environmental sustainability, and pedestrian opportunities using easy-to-implement yet unconventional urban renewal site and system improvement strategies.

In addition to replacing the Promenade’s concrete and aging pavers with standard and colored concrete patterns, improvements also added a new native planting plan, modern site furnishings, a concrete seating wall, and 50% increase in total greenspace. Together, this renewed outdoor space allows visitors to take part in more active and healthy lifestyles, with designs that create a sense of place not captured elsewhere in the community. A key element of these efforts was to preserve the Historic Roth Fountain, which now serves as a centerpiece. To do so, the updated Promenade was restructured to promote pedestrian versus vehicular traffic, allowing it to be a dedicated space to travel through, stop and relax, have conversations, experience community events, or enjoy lunch with a view.

Approximately 50% of the paved surface area in the existing Promenade was removed to incorporate bioretention cells, green space, and soil quality restoration. Called “multi-functional urban greenspaces,” these designs are literally green in that they introduce more natural landscapes, tree, and plant species to the area, and that they also leverage naturally occurring biological processes to reduce erosion and water pollution during rain events.

The Promenade’s high pedestrian traffic created the perfect opportunity to promote the innovative stormwater management solutions implemented across the site. Following project completion, a stormwater demonstration event presented to the community showcased how the new stormwater infrastructure and permeable surface manages rainfall, run-off, and roof drainage. Today, newly installed permanent signage provides educational components within the site to inform visitors of the purpose and benefits of sustainable urban design practices.


  • Blue Earth County Justice Center

  • Cherokee Aquatic Center

  • Elmore Public Library

  • Fairmont Water Treatment Plant

  • Mankato Fire Station #2

  • Mankato Intergovernmental Center

  • Mankato National Guard Training and Community Center

  • Mankato Public Safety Center

  • MnDOT Enfield Safety Rest and Picnic Area

  • Nicollet County Health and Human Services

  • Prior Lake Fire Station #2

  • Rock County Law Enforcement Center

  • Second Street Ramp

  • St. Peter Community Center

  • Sumner Avenue Town Square

  • Waseca Public Safety Center