HomeMy WebLinkAbout220.2012" MIN.
6" MIN. , SEE NOTE 4
EXISTING PAVEMENT SURFACE
SURFACE RESTORATION AS
SPECIFIED IN CONTRACT DOCUMENTS
"CRUSHED SURFACING TOP COURSE" PER
WSDOT STD. SPEC 9-03.9(3), "BANK RUN
GRAVEL FOR TRENCH BACKFILL" PER
WSDOT STD. SPEC 9-03.19, OR "GRAVEL
BORROW" PER WSDOT STD. SPEC 9-03.14(1),
COMPACTED TO 95% OF MAXIMUM DENSITY
BENCH AS NEEDED FOR
SHORING SYSTEM WHEN
DEPTH IS 4' OR GREATER
PIPE ZONE BEDDING AND BACKFILL
PER STD. PLANS 220.00 AND 220.10
PIPE
NEAT LINE TRENCH
UNPAVED AREAS PAVED AREAS
SEE NOTE 1
NOTES:
1.SEE WSDOT/APWA STANDARD SPECIFICATIONS SECTION 2-09.4 FOR
MEASUREMENT OF TRENCH WIDTH.
2.EXCAVATIONS OVER 4' DEEP SHALL COMPLY WITH THE SAFETY STANDARD
DESCRIBED IN CHAPTER 295-155 PART N OF THE WAC.
3.MAXIMUM BACKFILL DEPTH ABOVE PIPE SHALL NOT BE EXCEEDED, AS
DETERMINED BY PIPE MANUFACTURER.
4.IN PAVED AREAS, IF PIPE HAS LESS THAN 3' OF COVER, USE "CRUSHED
SURFACING TOP COURSE" FOR THE ENTIRE BACKFILL DEPTH ABOVE PIPE ZONE.
5.SEE CONSTRUCTION PLANS FOR SPECIFIC PROJECT REQUIREMENTS.
SEE STANDARD PLANS 110, 110.1, 110.2, AND 111 FOR PAVEMENT
RESTORATION REQUIREMENTS
"CRUSHED SURFACING TOP COURSE" PER
WSDOT STD. SPEC 9-03.9(3), COMPACTED
TO 95% OF MAXIMUM DENSITY
TYPICAL TRENCH AND BACKFILL
STD. PLAN - 220.20
PUBLIC WORKS
DEPARTMENT
APPROVED:
DATEGregg Zimmerman
Public Works Administrator
UNLESS OTHERWISE NOTED, DRAWING IS NOT TO SCALE (NTS)
DocuSign Envelope ID: 6EECF5B6-602A-4E4A-B436-A317AA638878
9/28/2018 | 9:45 AM PDT