The exercise covers roadside pits and all 206 corporation-owned properties, with over 30 structures clogged by silt and waste. The Tiruchirappalli City Corporation has begun surveying defunct rainwater-harvesting (RWH) structures across the city to restore their ability to capture runoff and recharge groundwater. The exercise covers roadside recharge pits as well as systems in all 206 corporation-owned properties, including zonal offices and health centres.