7. Asphalt Transition Diagrams and Skid Trail Closures.pdf
PDF 380 KB Posted
- Attached to
- Crest Switchback DxP IRSC
- Solicitation number
- 12363N26Q4030
- Issued by
-
Department of Agriculture Forest Service
About this file
These are technical design drawings for the Crest Switchback DxP Stewardship project located on the Sandia District of Cibola National Forest in the Southwestern Region of the U.S. Department of Agriculture Forest Service. The drawings were prepared by the Forest Service and dated November 5, 2025.
Drawing D-01 provides an Asphalt Transition Detail that specifies the construction methodology for blending new asphalt into existing road surfaces. The procedure involves three steps: positioning a roller before the blend area and excavating a trench across the road to a depth of approximately three times the HMAC (Hot Mix Asphalt Concrete) thickness, which is approximately 3 feet in width; placing and compacting a 4-inch depth of aggregate base course into the trench; and immediately placing 2 inches of excavated existing aggregate material back into the trench, compacting it, then adding new surface aggregate and compacting to achieve the required transition depth. Drawing D-02 illustrates Skid Trail and Entry Management procedures, including the construction of earth berms with slopes of 1.5:1 downgrade, incorporating logs, rocks, or other materials placed on berms to discourage vehicular use. The berm locations are based on skid trails utilized during the timber contract operations. Both drawings are marked "Not to Scale" and include standard Forest Service title block information and revision tracking.
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Text version
PROFILE VIEW
ASPHALT TRANSITION DETAIL
3'
EXISTING HMAC
BLEND TO
EXISTING
GRADE
EXISTING EDGE OF ROAD
NOT TO SCALE
ASPHALT TRANSITION STEPS:
1. POSITION ROLLER BEFORE BLEND AREA. EXCAVATE TRENCH ACROSS ROAD TO A DEPTH OF APPROXIMATELY 3 TIMES THE HMAC
THICKNESS AND DISPOSE OF EXCESS AT WASTE SITE. THE TRENCH SHALL BE APPROXIMATELY 3' WIDE IN LENGTH. PLACE AND
COMPACT 4" DEPTH AGGREGATE BASE COURSE INTO TRENCH AS SHOWN.
2. ADD AGGREGATE COURSE TO TRENCH
3. IMMEDIATELY PLACE 2" DEPTH EXCAVATED EXISTING AGGREGATE MATERIAL FROM STEP ONE BACK INTO TRENCH AND COMPACT.
ADD NEW SURFACE AGGREGATE AND COMPACT TO GET THE REQUIRED DEPTH FOR TRANSITION.
NEW SURFACE AGGREGATE *BLEND
BACK INTO EXISTING AGGREGATE
EXISTING SURFACE
DRAWN
DESIGNER
STAMPS, LOGOS, AND SEALS
PROJECT NAME
DRAWING TITLE
CHECKED
ARCHIVE NO.
DATE
PROJECT NO.
DRAWING SHEET NO.
DATENO.
REVISION / ISSUE
OFSHEET
United States Department of Agriculture Forest Service
/4/
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SOUTHWESTERN REGION
CREST
SWITCHBACK DxP
STEWARDSHIP
IRSC
CIBOLA NATIONAL
FOREST
D5
SANDIA DISTRICT
ASPHALT TRANSITION
DETAIL
11/5/2025
GF
DG
GF
D-01 1 2
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SKEW
C
DOWNGRADE
MATERIAL TO BE EXCAVATED
1.5
MATERIAL TO BE EXCAVATEDEXCAVATED MATERIAL
A
B
1.5
D
DOWNGRADE
NOT TO SCALE
PROFILE VIEW
NOT TO SCALE
NOTE:
PLACE LOGS, ROCKS OR OTHER MATERIAL ON
BERM TO DISCOURAGE VEHICULAR NEGOTIATION.
LOCATIONS BASED ON SKID TRAILS USED DURING
CONTRACT.
EARTH BERM
DRAWN
DESIGNER
STAMPS, LOGOS, AND SEALS
PROJECT NAME
DRAWING TITLE
CHECKED
ARCHIVE NO.
DATE
PROJECT NO.
DRAWING SHEET NO.
DATENO.
REVISION / ISSUE
OFSHEET
United States Department of Agriculture Forest Service
/4/
:4 2 D
EN
AE
GI
ER
SC
H
C:
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SE
RS
\D
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S.
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(R03)
SOUTHWESTERN REGION
CREST
SWITCHBACK
DxP STEWARSHIP
IRSC
CIBOLA NATIONAL
FOREST
D5
SANDIA DISTRICT
SKID TRAIL AND ENTRY
MANAGEMENT
11/5/2025
GF
DG
GF
D-02 002 2
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| Sheets and Views |
| ASPHALT TRANSITION-PLOT |
| OLE1 |
| DECOMMISSIONING TYPICALS-EARTH BERM |
| OLE1 |
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