Greg Marks, Forest Accessibility Coordinator for the Sierra National Forest, was injured in a helicopter accident in 1983. Although Greg now depends on a wheelchair for mobility, he remains an avid fisherman and boating enthusiast (figure 2). Greg asked the Missoula Technology and Development Center (MTDC) to evaluate and modify several ramps to assist resource and recreation planners in making our waterways more accessible.

Figure 2—Greg Marks, Sierra National Forest, shows
how he gets into a boat from his wheelchair.