Granule Plant Stormwater Total Suspended Solids
Little Rock, Arkansas
A roofing granule plant, in operation since the 1940's, was faced with an on-going issue of granular fines from its production operations discharging to a tributary of Fourche Creek in Little Rock, AR. Additionally, areas on the site that had been backfilled or reclaimed with the excess fines from the crushing operations (material locally known as Donna Fill) were prone to excessive erosion.
Beginning in 1999 and culminating with the installation of the final control measures in 2003, FTN assisted the plant with designing and implementing an integrated system of runoff, erosion and sedimentation controls to dramatically reduce the sediment loading to the receiving stream.
The plant presented a number of physical constraints in designing a system to fit the existing infrastructure. The plant operates 24 hours/day with minimal plant down time and all features had to be constructed without impacting plant operations. In 2003, over 900 tons of sediment were trapped and removed prior to discharge, providing a direct and beneficial impact on the quality of runoff from the site entering Fourche Creek.