CRWD and its partners prioritized several improvements to William Street Pond that would have a direct impact on water quality. First, sediment was removed from the pond to restore its full water storage capacity. Next, a new baffle device and pond inlet pipe were installed to trap large debris and dissipate the flow energy of the water entering the pond, improving water clarity and reducing turbidity.
Finally, the District created two iron-enhanced sand filtration benches near the pond outlet. These are flat areas next to the water line filled with a mixture of sand and iron filings. Sand filtration is a common solution that remove particulate matter and pollutants from stormwater. When stormwater flows through the sand, dissolved pollution bonds to the iron and prevents it from entering Lake McCarrons. Pond improvements were completed in September 2011.