See the article for some stunning before/after photos First Alum Treatment is Complete! --Prior Lake/Spring Lake watershed district article
HAB Aquatic Solutions, Inc. finished dosing Spring Lake with alum on November 1st. The crew only encountered a few windy days during the course of the treatment, but were able to successfully navigate toward the sheltered side of the lake to continue dosing without delay.
Below you can check out the before and after pictures taken from the wheelhouse on the barge. During the application, as the alum settles toward the lake bottom it sweeps phosphorus out of the water column, and the impact is quite clear!