The Duluth Rear Range Light

The Duluth Ship Canal’s Rear Range Light. (Image: Library of Congress)

While the South Breakwater Light helped mariners find the canal, another light was needed to provide a focal point by which to guide them through its entrance. In 1880 the Lighthouse Board approved another light at the south pier’s western (or inner) end. The light would stand taller than the South Breakwater Light; when used together, the two lights helped navigators establish range and find the center of the canal.

Construction on the wooden pyramid that held the light began in March 1889, and the beacon was shining by September. Like its counterpart on the eastern end of the pier, the inner light boasted a red fourth order Fresnel lens, flashing a signal every six seconds. It wasn’t foolproof: Just sixteen days after the light commenced flashing, the steamer India collided with the pier at the base of the light itself, damaging the foundation.

As with the old South Breakwater Light, the first Rear Range Light came down during the pier’s reconstruction. Engineers replaced the wooden pyramid with a seventy-foot-tall steel tower eight feet in diameter. Built in 1902, the tower is supported by four tube-like legs bolstered with struts and tension rods. The gallery at its top holds an octagonal cast-iron lantern that houses the lens. Workers painted the watch room black and the rest of the tower bright white, providing a striking visual contrast that allowed mariners to use it as a navigation device even in daylight. Engineers also relocated the light, placing it roughly in the middle of the pier instead of at its westernmost end.

In 1995 the old Fresnel lens retired to the Lake Superior Maritime Visitor Center; a new acrylic optic light took its place. And the tower has a slightly different look than when first lit: At some point painters reversed the black-and-white scheme. In 2008 the Coast Guard sold the Rear Range Light to Duluthians Steve Sola and Matt Kampf.