7.2.2.1 Determining Impracticability.
The use of General Exception 2 is reasonable where one or more conditions for an exemption in section 7.1 and at least one of the following limiting factors exist:
Limiting Factor 1. The combination of trail running slope (grade) and cross slope exceeds 1:2.5 (40 percent) for over a distance of 20 feet (6m).
Limiting Factor 2. The surface is not firm and stable for a distance of 45 feet or more (14 m).
Limiting Factor 3. The minimum trail width is 12 inches (305 millimeters) or less for a distance of at least 20 feet (6100 mm).
Limiting Factor 4. A trail obstacle of at least 30 inches (770 mm) in height extends across the full width of the trail.
Limiting Factor 5. One or more conditions for an exception exist that result in significant deviations from the technical provisions of section 7.4.1 through 7.4.8 for over 15 percent of the length of the trail.
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