Blue-green algae detected in West Causeway of Granite Springs Reservoir

CHEYENNE – The Wyoming Department of Health (WDH) has issued a harmful cyanobacterial bloom recreational use advisory for the West Causeway at the city of Cheyenne Board of Public Utilities’ (BOPU) Granite Springs Reservoir. The reservoir is located about 30 miles west of Cheyenne in Curt Gowdy State Park. The Causeway is an area west of the Granite Springs Reservoir where Middle Crow Creek flows toward the reservoir. The Causeway is separated from the main reservoir by a road.

Harmful cyanobacteria, also known as blue-green algae, can form harmful blooms in slow-moving water during the late summer when water temperatures are warmer. These blooms are considered harmful because they can produce toxins and other irritants that pose a risk to humans, pets, livestock and wildlife.

Cyanobacte