Broken Arrow City Council
Meeting of: 10-03-2023
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Presentation of Oklahoma Floodplain Managers Association, Ronald D. Flanagan, Gold Project Award for the Natural Rehabilitation of Stormwater Detention Facility - Park On Florence 2nd Regional Detention Facility
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Background:
On September 19, 2023, the City of Broken Arrow was awarded the prestigious Ronald D. Flanagan, Gold Project Award, from the Oklahoma Floodplain Managers Association (OFMA) for the Natural Rehabilitation of a Stormwater Detention Facility at the Park on Florence 2nd Regional Detention Facility. This is the second stormwater Gold Project Award the City has received for its efforts to improve our community's stormwater management as a whole.
On September 5, 2023, the City Council awarded a public construction contract to make modifications to an existing regional detention facility that includes converting a portion of it to a wet pond facility while incorporating several stormwater quality aspects to the facility. The primary purpose of any detention facility is to reduce flooding and maintain a peak discharge rates to levels that existed prior to the development of the property or even lower. In the case of the Park On Florence Detention Facility, Staff determined that the facility truly served as a regional facility by receiving stormwater runoff from off-site coupled with the stormwater runoff from the subdivision itself. Furthermore, Staff determined that the facility did not function adequately and needed certain improvements in order to maintain pre-developed discharge flows for the combined region.
In addition, the local residents expressed a strong desire for more natural aspects to be incorporated in any proposed improvement. Staff was able to incorporate stormwater quality features that will allow some of the facility to remain in a "natural wetlands" condition. Influent flows will be directed to drain through a grassy, wetlands swale that is bounded with specific h...
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