Originally shared by +Ron Grooms
Port Huron, Michigan
The Fort Gratiot Lighthouse, built in 1829, is the oldest lighthouse in Michigan. The tower was originally 65 feet tall with an Argon lamp. As traffic on the Great Lakes increased, by the 1850"s there was a need for better navigational aids. In 1857 a Fourth order Fresnel Lens was added. In 1862 the tower was raised to 82 feet tall to accommodate the Fresnel len"s superior range.
#lighthousethursday+LighthouseThursday with +Heiko Köster
#coastalthursday+Coastal Thursday with +David Polzine and +Jon Kahn
#lighthouse#lighthousephotography#travelphotography
Fort Gratiot Lighthouse