HomeMy WebLinkAboutAddenda - RFP - P982 BOBCAT RIDGE TRAIL DESIGN AND CONSTRUCTON (19) 2309.18,2.32b, Ex. 01
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FSH 2309.18 - TRAILS MANAGEMENT HANDBOOK
WO AMENDMENT 2309.18-91-2
EFFECTIVE 11/8/91
2.32b - Exhibit 01
ATV TRAIL (three-wheel/four-wheel vehicle) Guide
Easiest More Difficult Most Difficult
Grade
Max. Sustained 15% 25% 35%
Length 200' 300' 500'
Max. Pitch 20% 30% 50%
Clearing (One-way traffic)
Wooded
Downhill Side 2' 1.5'' 1.0'
Uphill Side 3' 3' 3'
Level 3.1' each side 2.6' each side 2.5' each side
Open
Downhill Side 2' 1.5' 1.0'
Uphill Side 3' 3' 3'
Level 3.1' each side 2.6' each side 2.4' each side
Height 6' 6' 5'
Tread 1/
Width
Minimum 6.2' 5.2' 4.8'
Maximum 7.2' 6.2' 5.8'
Surface Relatively smooth, Sections of relatively Relatively rough with
no roots or rocks rough surface, no roots very rough short
protruding more or rocks protruding sections, no protruding
than 3', tread plane more than 3", tread rocks 3", tread plain
flat, sweeping curves, plane can be insloped can be insloped or
no holes wider than 5% max., climbing outsloped 10% max.,
24" nor deeper than turns, no holes wider switchbacks, few
6". Loose sand is than 36" nor deeper sections with holes
okay. than 6". Loose sand wider than 36" and
is okay. deeper than 6".
Obstacles 2/ Wet xings 6" deep Wet xings 10" deep Same as More Difficult
(optional) 10' long max., 25' long, waterbars except waterbars may
draindips okay, no downhill okay. be uphill and downhill.
waterbars.
Few small logs less than 8" diameter.
2.32b - Exhibit 01 -- continued
Exposture (Sideslope)
0% to 20% 20% to 30% 30% to 40%
Length Less than 300' 300' to 500' More than 500'
Traffic Flow One-way or two- One-way or two- One way or two-
way with turnouts way with turnouts way with turnouts
Length of Trip
One-half day 3 miles 10 miles 15 miles
Full day 6 miles 20 miles 30 miles
Turns per 1/4 mile 2 6 11
1/ Increase tread width 6 inches on switchbacks or where side slopes exceed 30 percent.
2
/ Avoid any type of sharp peaks in vertical alignment.