Hanscom Park Green Infrastructure Project


Schedule

This project is currently in the final design phase. Construction is anticipated to begin in 2018.

Project Description

This project is located in the Leavenworth Basin adjacent to the intersection of South 32nd Avenue and Ed Creighton Avenue. Hanscom Park is Omaha’s oldest park. The hilly, forested property was donated to the City for use as a park in 1872, with park improvements designed in the early 1890s by the noted landscape architect, HWS Cleveland. The 58-acre park includes extensive natural green space, picnic areas, a playground, small informal soccer and baseball fields, an indoor tennis center, a splash pool, a dog park, a lagoon, formal gardens, the City greenhouse, and a pavilion.

The Hanscom Park Green Infrastructure Project explored the possibility of creating green infrastructure features including cascading bioswales, grassed swales, and other above-ground green infrastructure features to better manage area stormwater runoff from adjacent neighborhoods and within the park. These features will increase the amount of rainwater infiltration within the park’s natural areas. The features also will reduce the runoff from the surrounding neighborhoods that are conveyed to the park and enters the City’s combined sewer system. Two areas within the park were examined. A large ravine in the park’s northeast quadrant was studied to determine how water could be detained, to increase the amount of groundwater recharge in this natural area. Improvements within the ravine were designed to enhance and blend with natural existing conditions and habitat. Stormwater from the park’s southwestern corner and the adjacent neighborhood to the west was studied to determine how best to convey this water to locations in the park where it could infiltrate into the ground. In the southwestern corner, water cleansed by the green infrastructure features will be used to supplement the water level in the lagoon. The park’s existing lagoon will attenuate stormwater runoff for short time periods during rain events that will help reduce downstream peak flows, thereby reducing sewer overflow volumes. This green infrastructure feature along with the increased infiltration throughout the park will assist the City in meeting the goals outlined in Omaha’s CSO Long Term Control Plan.

Project References