Eight firefighters assigned to Special Operations reported to the Wichita Water Department on Thursday to provide assistance in making a temporary repair to a drain assembly located at the bottom of a 60 million-gallon sediment basin. The firefighters donned dry suits with thermal underwear - the water temperature was around 60 degrees - and dive gear and spent the next four-plus hours attempting to make the needed repairs. The assembly was located in a sump at the bottom of the basin requiring divers to work inverted at a depth of 24 feet, four feet of which was heavily laden with silt, resulting in zero visibility conditions. Despite the difficult conditions, some of the work was completed; further assessments were needed.