Newtown Public Works crews have gotten to the bottom of what caused a sewage backup to come through two manhole covers on Church Hill Road earlier this month. Director Fred Hurley told the Newtown Bee that grease covered bricks, stones, and some wood clogged a 12-inch-diameter municipal sanitary sewer line January 15th. He says the foreign matter was carried through the sewer system by gravity until the blockage and leak occurred. Hurley told the Bee that a specialized truck was used to inject highly pressurized water into the sewer system, which was then vacuumed out. The blockage may have come from multiple locations. He says the grease may have been petroleum jelly incorrectly disposed of down toilets.