Passing the Torch: National Park Service Takes Over Sea Caves Watch Project

By Marie E. Zhuikov

The beautiful and popular sea caves along the Apostle Islands National Lakeshore have been made less deadly for the foreseeable future now that a public safety project designed to prevent kayaking tragedies has been transferred to the National Park Service from Sea Grant and other partners. is a real-time wave observation system that provides webcam photos and wave height, water temperature and wind speed data to kayakers, who can access the website before venturing out on Lake Superior to the sea caves.

“Since went online, it’s contributed to a reduction in mishaps in the park,” said Dick Carver with the Friends of the Apostle Islands. “We went from four kayaker deaths in a five-year-period to none in the past five years.” 

The mainland sea caves can be dangerous because of the possibility for high waves and the sheer cliffs, which make it impossible for kayakers to get out of the water if they get into trouble.

“There’s a misconception that because the caves are close to shore, they’re safe,” said Tam Hofman, ranger at Meyers Beach. “But conditions can change quickly out on the lake, especially near the rock cliffs and caves, and you can’t always see that from the launch site.” 

In recognition that was crucial to operations at the caves in both summer and winter, the National Park Service changed its status as a “project” to a regular part of its work plan. The park will be aided by the original partners—Chin Wu, a civil and environmental engineering professor at the University of Wisconsin-Madison, and Gene Clark, a coastal engineer with Wisconsin Sea Grant—who recently finalized a memorandum of under- standing outlining their roles in Bayfield at the lakeshore headquarters. 

“The original focus was summer wave conditions, but with the addition of the webcam, the system emerged as a vitally important year-round tool,” said Bob Krumenaker, Apostle Islands National Lakeshore superintendent, “especially in winter 2014, when record visitation to the ice-covered caves made international news.”

“It’s changed our park protocols,” he continues. “We’ve made a commitment to the system and plan to continue it in the long-term. Before our staff go out the caves or before we open the caves to the public in the winter, our motto is, ‘check the camera first!’” 

“The goal was to make people using the caves feel safe,” said Wu. “It’s been gratifying to be part of a project that’s had an impact and has made a difference.” 

Wu is also using what he’s learned for webcam and wave sensor installations in three other locations to help detect and forecast rip currents. The locations are Milwaukee; Port Washington, Wis.; and Park Point in Duluth, Minn. The images and data will be available on

The original project was funded by the National Oceanic and Atmospheric Administration, the Wisconsin Coastal Management Program and the Friends of the Apostle Islands, with support by the city of Bayfield. The National Park Service was involved in the project from the onset and provided significant in-kind support. 

Under the new agreement, Wisconsin Sea Grant will provide coastal engineering expertise as needed and public outreach and communications for the project. The University of Wisconsin-Madison will provide technical assistance for equipment operation and website maintenance. The National Park Service will deploy and retrieve the underwater wave pressure gage and cable seasonally, provide basic equipment maintenance and provide wireless service funding. The Friends of the Apostle Islands will provide funding for project activities and travel, and the Wisconsin Coastal Management Program and the city of Bayfield will provide advice and public awareness support. The agreement is effective for five years. 

The Aquatic Sciences Center is the administrative home of the
University of Wisconsin Sea Grant Institute & University of Wisconsin Water Resources Institute.

©2011 University of Wisconsin Board of Regents