The purpose of this Request for Proposal (RFP) is to solicit sealed proposals for the maintenance and repair of Richland County owned detention ponds, ditches, water quality units, and curb screens. The goal is to properly maintain and repair our detention ponds to allow retaining larger flows and thus reduce the peak runoff rates downstream and to assist in providing necessary storage volumes during larger storm events and removing certain pollutants. To mitigate the increase risk of flooding downstream, increase instability of downstream channels that may lead to aesthetic and nuisance problems; clear the cause of unpleasant odors, nuisance insects, and algae blooms; clearing of generally unsightly and unkempt area.