Little Jackson Creek Up-Ditch Drainage Project

Significant storm flow contributions are also conveyed into and through the up-ditch from a highly impervious watershed. Because there are no functional best management practices in place to store and reduce flows before they enter the ditch, the velocities and sheer stresses cause significant erosion. To address the significant erosion problem traditional best management practices will be used such as laying back the banks, bank-toe protection/arming, check dams and drop structures. A Regenerative Stormwater Conveyance (RSC) will be used in the lower approximately 1,800’ feet of the up ditch. RSC’s safely convey large flows (e.g. 100-year event) over and through a step-pool sequence, which creates a series of energy dissipaters that decrease downstream velocities and overall sheet stress, which results in a reduction of downstream erosion and bank stabilization. This construction project is being funded with a Hazard Mitigation Grant (HMGP) that Richland County applied for and was approved through FEMA.

Division 31 -	Earthwork, Erosion and Sedimentation Controls.
Division 33 -	Utilities, Storm Drainage Utilities, Ponds and Reservoirs.
Division 35 -	Waterway and Marine Construction, Shoreline Protection, Waterway Construction and Equipment.