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7709.56,7.1
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FOREST SERVICE HANDBOOK
GIFFORD PINCHOT NATIONAL FOREST (REGION 6)
VANCOUVER, WA
FSH 7709.56 – ROAD PRECONSTRUCTION HANDBOOK
CHAPTER 7 – DRAWINGS, SPECIFICTIONS, AND ESTIMATES
Supplement No.: R6/Gifford Pinchot-2
Effective Date: October 1986
Duration: Effective until superseded or removed
Approved: ROBERT W. WILLIAMS
Date Approved: 10/1986
Forest Supervisor
Posting Instructions: Supplements are numbered consecutively by Handbook number
and calendar year. Post by document name. Remove entire document and replace with this
supplement. Retain this transmittal as the first page of this document.
New Document(s):
7709.11,7.1
Superseded Document(s):
None
2 Pages
(Last supplement was GP Supp. No. 1)
Digest: Insert digest information here
7.1
Provides guidelines for use of line diagrams for new construction plans.
R6/GIFFORD_PINCHOT_SUPPLEMENT_2
EFFECTIVE DATE: October 1986
DURATION: Effective until superseded or removed
7709.56,7.1
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FSH 7709.56 - ROAD PRECONSTRUCTION HANDBOOK
CHAPTER 7 – DRAWINGS, SPECIFICATIONS, AND ESTIMATES
7.1 - Drawings
This guide shall be used to determine when line diagrams may be used in place of a Plan-Profile
(Federal Aid Sheet).
GUIDE FOR USING LINE DIAGRAMS FOR NEW CONSTRUCTION
ON TRAFFIC SERVICE LEVEL "C" OR "D" ROADS
SIDE SLOPES
OVER 40 PERCENT
SIDE SLOPES
UNDER 40 PERCENT
STABILITY PROBLEMS EXIST
NO STABILITY PROBLEMS EXIST
CULVERTS OVER 36”
CULVERTS 36” OR SMALLER
GRADE CONTROL CRITICAL
(examples below)
GRADE CONTROL NOT CRITICAL
(examples below)
USE COMPUTER FOR
DESIGN OR TO DEVELOP
QUANTITIES
COMPUTER NOT REQUIRED
FOR DESIGN OR TO DEVELOP
QUANTITIES
USE PLAN-PROFILE FOR
DRAWINGS
USE LINE DIAGRAM
FOR DRAWINGS
(Reference is FSH 7709.11, Guide D-10)
Two examples of situations where grade control could be critical are when design grades
approach 20% and when fill height over a culvert must be closely controlled.
The sideslopes and culvert sizes shown above are not absolutes, however, good judgement must be
used and prior approval of the Forest Engineer must be obtained prior to exceeding the guidelines.
Special Project Specification 299A should be used whenever possible, especially when using the
line diagram method for drawings.
Segments of the road may allow the use of a line diagram, while other segments may require a
plan and profile.