It was a cold day in mid-February, but the crew from the Upper Thames River Conservation Authority and Bluewater Pipe were determined to install phosphorus interception and extraction technology at the Salford site.
Basically, the tower is hooked into the field's tile drainage system. Water is diverted through a porous bag of combined slag (byproducts from steel production) and stone where it is hoped that the phosphorus will bind to the material in the filter.
The advantage of this technology is that it doesn't mind the cold and will work in both summer and winter.
Watch for data coming from the demonstration sites after the spring runoff.
A list of all the demonstration sites is