The North Campus Corridor Detention project consisted of the design and construction of two individual detention basins north of Kimball Avenue between College Avenue and Denison Avenue. The basins were designed in order to reduce the proposed flow as a result of future development along the Kimball Avenue corridor. The basins resulted in a total impoundment area of 13.76 acres for the 100-year storm frequency.

The proposed detention basin release flows were modeled so that the proposed flow was less than “Existing Conditions”. The “Existing Conditions” were assumed to be the existing land cover in 1991. This removed all existing regional detention basins and allowed for a conservative approach to allow for a true reduction in the proposed flow.

Storm frequencies of 2 years, 10 years and 100 years were considered and modeled in accordance with the requirements of the City of Manhattan.  The hydrology and hydraulics were performed using HEC-HMS software.

In addition to the design of the physical basin, two riprap basins were also designed downstream. These basins were designed using HEC-14 design standards and requirements for Hydraulic Design of Energy Dissipators. These basins provide stream armoring, reducing erosion caused by the release, while also reducing the overall energy of the release.                                                                           

This project required an extensive coordination effort with Kanas State University Foundation, several departments of Kansas State University, Corps of Engineers, and the City of Manhattan.