Attach2.1240LU26Q0084StandardDrawings.pdf
PDF 798 KB Posted
- Solicitation number
- 1240LU26Q0084
- Issued by
-
Department of Agriculture Forest Service
About this file
This document is a set of standard drawings and technical specifications for trail construction and maintenance on the Sweet Trunk Trail #274 located in the Big Timber Ranger District of the Custer Gallatin National Forest. The drawings were prepared in 2026 and are signed by Forest Supervisor Zachary Fisher, District Ranger Jefferson Frady, and Forest Engineer Matthew Jedra.
The standard drawings package includes thirteen detailed technical drawings that establish construction and design standards for trail work. Key drawings specify: illustration of trail structure terms and cross-sectional profiles; clearing limits requiring 4 feet uphill and downhill clearing with 12 feet vertical clearance; typical trail cross-sections with a standard 36-inch trailbed width; trailbed and slope finishing requirements including root removal and rock protrusion limits; drain dip specifications with 3-5% outslope range; turnpike Type II construction using 2-6 inch rock with 30% maximum size; switchback Type I design with 3% inslope and grade transitions; culvert installation without headwalls requiring 6 inches minimum cover; natural ford construction with 36-inch width and stepping rock details; rock retaining wall specifications with 130-pound edge rocks and 12-inch embedment; sign and post installation with 5-6 inch diameter round wood posts set 30 inches deep; and trail obliteration procedures including scarification, trench backfill, restoration, and contour restoration techniques. The specifications establish minimum clearance requirements, slope ratios for backslope and fill slopes, stump height requirements flush with ground, and material gradation standards for various trail components.
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Text version
Custer Gallatin National Forest
Ranger District
FOREST SUPERVISOR DATE
DISTRICT RANGER DATE
FOREST ENGINEER DATE
Sweet Trunk Trail 274
No.
900-1
911-1
912-1
912-2
912-5
912-
913-2
914-1
921-2
935-1
952-1
954-1
Big Timber Ranger District
Custer Gallatin National Forest
Standard Drawings
Drawing Description
ILLUSTRATION OF TERMS
CLEARING LIMITS
TYPICAL TRAIL CROSS SECTIONS
TRAILBED AND SLOPE FINISH
DRAIN DIP
NOT USED
TURNPIKE TYPE II
SWITCHBACK - TYPE I
CULVERT WITHOUT HEADWALLS
ROCK RETAINING WALL
SIGNS & POSTS
TRAIL OBLITERATION
WIRE GATE
GATE BRACE
917-10 NATURAL FORD
36" Match existing stream features for side, check, stepping and retainer rock.
NATIVE
TRAIL OBLITERATION
ol ground ol ground ol ground
=I
-in= -111=
-111= -i I l
Maximum clod size 12"
NOT TO SCALE
Pull motriol from upper cut ore□ or from downhill side of trail bench
Provide uniform finished slope.
RESTORATION
Compacted suitable material from designated borrow source.
Troilwoy width varies
TRENCH BACKFILL
8 feet
SCARIFICATION
Scarify existing troilbed to o depth 4" min
==--=1w
2/18 9 5 - 1 g nf
| 900_00_gnf_Cover |
| 900_01_gnf_Terms |
| 911_01_gnf_Clearing |
| 912_01_gnf_TypTrail |
| 912_02_gnf_Trailbed |
| 912_05_gnf_DrainDip |
| 912_07_gnf_StrmRock |
| 913_02_gnf_TurnpikeII |
| 914_01_gnf_Switchback-I |
| 915_01_gnf_Restoration |
| 921_02_gnf_CulvertwoHW |
| 935-01gnf_RockWall |
| 952_01_gnf_Sign&Post |
| 954_01_gnf_Obliteration |
File details come from the government source that posted it. Updated .