Camp 4 was the site of ongoing friction between climbers and the National Park Service. The conflict came to a head in 1997, when flooding in Yosemite Valley destroyed many employee housing units. The Park Service decided to build a three-story dormitory complex at Camp 4, effectively eliminating the campground. Tom Frost financed and led the fight to save Camp 4, with help from attorney Richard Duane. Together, Frost and Duane filed a lawsuit against the National Park Service to save the historic rock climber campsite, and convinced the American Alpine Club to add their name to the list of plaintiffs. Climbers and mountaineering associations all over the world wrote letters in support, arguing that Camp 4 was one of the three most famous climbing base camps on earth, alongside Everest Basecamp and a similar site at Chamonix in the Alps. The effort was successful.