Raspberry Island Lightstation 1940s aerial
The little lighthouse was hardly adequate for three keepers and their family members, so in 1906, the Lighthouse Service remodeled the building from the ground up. Portions of the old structure were incorporated into the new building, but final result was a lighthouse that was much larger and more imposing than the original. The new lighthouse was occupied until 1947, when the light was converted to automatic operation. The lens remained in the tower until 1957, when the Coast Guard replaced it with a battery-operated beacon mounted on a pole in front of the lighthouse. Today, visitors can see the original Raspberry Island lens on display at the Wisconsin State Historical Society Museum on Madeline Island.
While the lighthouse we see on Raspberry Island appears much the same as it did in 1906, the surrounding setting has changed substantially. When the lighthouse was built, the surrounding area was cleared of trees so that ships would have a clear view of the beacon. Photos taken as recently as the 1940s show an open area of several acres around the station. Today, forest has encroached upon the site, and only a portion of the original clearing remains.
More ominously, the bluff in front of the lighthouse has suffered severe erosion. The steep clay banks face the force of Lake Superior at their base, while the upper sections are subject to "slumping," or collapse. Despite some efforts at erosion control in the 1980s, engineers warn that the receding bank could threaten the light station structures in as little as ten years.
Fortunately, Congress has acted to protect the historic treasure known as the Raspberry Island lighthouse. Funds were appropriated to institute erosion control measures that will combine construction of a seawall at the base of the bluff, regrading the slope to a stable angle, drainage improvement, and planting vegetation. During the summer and fall of 2002, visitors to Raspberry Island were able to see the work in progress. By the end of October, more than half the project was complete. Work resumed in the spring of 2003, and the project was completed in July. For more information, visit the Rasperry Island Erosion Control Project page.