Attachment 6_Trail Design Parameters.pdf
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- Attached to
- Malheur National Forest Trail Maintenance
- Solicitation number
- 1240BK25Q0092
- Issued by
-
Department of Agriculture Forest Service
About this file
This document is a detailed technical guide for Trail Design Parameters specific to Pack and Saddle trails within the National Forest System, as outlined in Forest Service Handbook (FSH) 2309.18, Section 23.12, Exhibit 01. The document provides comprehensive design guidelines for trails across five trail classes (1-5), specifying technical parameters such as tread width, design surface, protrusions, obstacles, grade, cross slope, clearing height, shoulder clearance, and turn radius. The parameters vary based on whether the trail is in wilderness or non-wilderness areas, and whether it is a single or double lane trail. Notably, Trail Classes 1 and 5 are typically not designed or actively managed for equestrian use, while Trail Classes 2-4 have progressively more refined design specifications, with increasing trail width, smoother surfaces, fewer obstacles, and more moderate grades to accommodate pack and saddle travel.
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Text version
Tr ai l D es ig n
P ar am et er s
P ac k an d S ad d le (F
S H
9.
, S ec tio n
.1
2, E xh ib it
D es ig n
P ar am et er s ar e te ch ni ca l g ui d el in es fo r th e su rv ey , d es ig n, c on st ru ct io n, m ai nt en an ce
, a nd a ss es sm en t of N at io na l F or es t S ys te m t ra ils b as ed o n th ei r
D es ig ne d U se a nd T ra il
C la ss a nd c on si st en t w ith t he ir m an ag em en t in te nt .1
L oc al d ev ia tio ns fr om a ny
D es ig n
P ar am et er m ay b e es ta b lis he d b as ed o n tr ai l-sp ec ifi c co nd iti on s, t op og ra p hy , o r ot he r fa ct or s, p ro vi d ed t ha t th e d ev ia tio ns a re c on si st en t w ith t he g en er al in te nt o f th e ap p lic ab le T ra il
C la ss
D es ig ne d U se
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Tr ai l C la ss
Tr ai l C la ss
Tr ai l C la ss
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(S in gl e
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Ty p ic al ly n o t d es ig ne d o r ac tiv el y m an ag ed fo r eq ue st ri an s, al th o ug h us e m ay b e al lo w ed
8″
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0″ o r gr ea te r al on g p re ci p ic es
4″
M ay b e up t o ″ a p s id e sl op es
0″ o r gr ea te r al on g p re ci p ic es
M ay b e up t o ″ a p s id e sl op es
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Ty p ic al ly n o t d es ig ne d o r ac tiv el y m an eq ue st ri o ug h us e al lo w ed N o n-
W ild er ne ss (S in gl e La ne
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M ay b e up t o ″ a p s id e sl op es
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8″
0″ o r gr ea te r al on g p re ci p ic es
6″
0″ o r gr ea te r al on g p re ci p ic es
N o n- W ild er ne
(D ou b le L an e)
4″
S tr uc tu re s
(M in im um
W id th
O th er t ha n b rid ge s:
6″
B rid ge s w ith ou t ha nd ra ils
: 6 0″
B rid ge s w ith h an d ra ils
″ c le ar w id th
O th er t ha n b rid ge s:
6″
B rid ge s w ith ou t ha nd ra ils
: 6 0″
B rid ge s w ith h an d ra ils
″ c le ar w id th
O th er t ha n b rid ge s:
6 ″
B rid ge s w ith ou t ha nd ra ils
: 6 0″
B rid ge s w ith h an d ra ils
″ c le ar w id th
D es ig n
S ur fa ce
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In te rm itt en tly r ou gh
N at iv e, w ith im p ro ve ct io ns o f b or ro w o r im p or te d m at er ia l a nd ut in e gr ad in g
M in or r ou gh ne ss
P ro tr us io ns
6″
M ay b e co m m on a nd co in uo us
3″
M ay b e co m m on
, n ot in uo us
3″
U nc om m on , n in uo us
O b st ac le s
(M ax im um
H ei gh t)
6″ 3″
/1
6/
Trail Design Parameters Pack and Saddle (FSH 2309.18, Section 23.12, Exhibit 01)
D es ig ne d U
PA
K A
N D
S A
D D
LE
Tr ai l C la ss
Tr ai l C la ss
Tr ai l C la ss
Tr ai l C la ss
Tr ai l C la es ig n
G ra d e2
Ta rg et G ra d e Ty p ic al ly n o t d es ig ne d o r ac tiv el y m an eq ue st ri o ug h us e al lo w ed
5%
0%
3%
2%
2%
0%
Ty p ic al ly n o t d es ig ne d o r ac tiv el y m an eq ue st ri o ug h us e al lo w ed
S ho rt P it ch
M ax im um
M ax im um
P it ch en si ty
0% o f t ra il 5%
5% o f t ra il 5%
0% o f t ra il
D es ig n
C
S p e
Ta rg et C p e 5%
0% 3%
0%
M ax im um
C p e
8% 5%
D es ig n
C le ar in g H ei g ht 8′
0′
2′
W id th
S om e lig ht v eg et at io n m ay e nc ro ac h in to cl ea rin g ar ea
6″
S ho ul er le ar an ce 6″
2″ P ac k cl ea ra nc e:
″ x
6″
8″
P ac k cl ea ra
6″
8″
P ac k cl ea ra
6″
D es ig n
Tu rn
R ad iu s
4′
5′
6′
0′
Fo r d ef in iti on s of
D es ig n
P ar am et er a tt rib ut es
(f or e xa m p le , D es ig n Tr ea d
W id th a nd S ho rt
P itc h M ax im um ) s ee F
S H
9.
, S ec tio n
Th e d et er m in at io n of tr ai l-sp ec ifi c D es ig n G ra d e, D es ig n S ur fa ce , a nd o th er
D es ig n
P ar am et er s sh ou ld b e b as ed u p on s oi ls
, h yd ro lo gi ca l c on d iti on s, u se le ve ls , e ro si on p ot en tia l, he r fa ct or s co nt rib ut in g to s ur fa ce s ta b ili ty a nd o ve ra ll su st ai na b ili ty o f t he tr ai l.
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