The City of Shreveport faces the prospect of mandatory water rationing after Monday. That's when a new rule, crafted by the Water and Sewer Department, goes into effect. Chief Administrative Officer Dale Sibley says the new rule, requiring mandatory rationing, would kick in if the level of Cross Lake should drop below 166 feet or if the daily amount of water coming into the water treatment plant should exceed 70-million gallons in a 12-hour period for ten days. Despite the threat of mandatory water rationing, the city council has given nine more residents in deep southeastern Caddo Parish -- just outside the Shreveport city limits -- the OK to tie into the city's water supply. For now, city officials are urging Shreveport residents to voluntarily conserve water -- especially when it comes to watering lawns and washing cars, since those are some of the biggest uses of water.