Because plastic pipe has a much smoother surface than corrugated metal pipe, the flow in the smaller pipe is the same as the original flow. The Stormwater Utility is committed to slip-lining or replacing all of the CMP storm line in the ground. Swale Construction - Swales are shallow depressions in grassy areas that collect storm runoff and allow it to percolate back into our shallow wells. The City is planning to construct swales in runoff problem areas to reduce pollutants to our canals and help replenish our shallow barrier-island wells. These swales will be built along the sides of roads to capture the runoff from our roads.
Swales help move water off our roads - which preserves roadways and reduce flood hazards.
The City will start dredging problem canals south of Minutemen Causeway in the spring of '98. Canals in the northern section will be dredged as needed over the next 5 years. This cleaning is accomplished using a VacCON truck that has a jet hose for loosening dirt and a vacuum for removing the debris. The stormwater crew has manufactured a special cleaning head for this jet, which works very well in our large lines. Street sweeping - The City contracts with Harris Sanitation for monthly street sweeping.