[en] This short report presents additional information on Cs-137 concentrations in the canal sediments and sludge in Beaufort-Jasper Water system. From 10 years of L-Reactor operation, it was conservatively predicted in the L-Reactor Environmental Assessment that about 41 Curies of Cs-137 would be transported from Steel Creek and into the Savannah River. Recent studies have provided an improved basis for these calculations and it is now expected that about 14 Curies will be moved in the first ten years. At a water usage rate of 8,000,000 gallons per day of Savannah River water for ten years, a maximum of about 0.02 Curies of Cs-137 could end up in the Beaufort-Jasper canal sediments and treatment plant sludge. Based on river dilution and transport of Cs-137, a more likely amount would be 0.01 Curies in ten years