Treating The Lake For Algae
City employees Bryan Swan and Brad Purdon spraying Castle Rock Lake for algae.
Every summer depending on the weather, algae grows in the lake. In order
to control this problem the city crew has to spray the lake with a product
called cutrine plus. This is an environmentally friendly way of
controlling algae growth before it blooms. Cutrine is 9% copper sulfate
and 91% inert ingredients. This product when sprayed out like you see in
the picture, stays suspended in the water for two to four days. The city
usually sprays the lake three to four times every summer to combat these
critters. The city has an agreement with PPL Montana in which they purchase the
product and we apply it. Algae plugs filters up very fast causing major
problems with the cities production of water and PPL Montana's filter operation.
This also causes issues with taste and odor of our water. This is a vital and
necessary for both entities.