PDX 2026-501 (160) C9.09.pdf
PDF 385 KB Posted
- Solicitation number
- 147231
- Issued by
- Multnomah County, Oregon
About this file
This is a technical design detail document for the Portland International Airport North Runway Rehabilitation project in Oregon, specifically addressing storm drainage and underdrain systems. The document contains four detailed construction specifications for utility installations: a tee connection from a catch basin to new HDPE storm line, pipe connection to catch basin/manhole structures, connection from the underdrain system to new HDPE storm line, and typical utility locate details. The specifications detail the use of new 12-inch HDPE lateral connecting pipes with manufactured wye and tee fittings, 45-degree angles for minimum 12-inch connections, watertight coupling methods, and non-shrink cement grout for water-tight wall penetrations. The document establishes core pipe outer diameter plus 2-inch holes for structure wall penetrations and includes provisions for locating utilities within one foot of openings with appropriate labeling and warning tape placement.
The technical specifications incorporate standard construction practices including 10-gauge XHHW copper stranded locate wire coils placed at various depths (1 foot, 2 feet) for identifying new and existing utilities, with wire fastened to utility centerlines using non-conducting ties. The document references specific invert elevations for connecting pipes as detailed on project profiles and emphasizes water-tight construction requirements for all utility penetrations through structures such as inlets, catch basins, manholes, headwalls, valve boxes, vaults, and junction boxes. The design was prepared by HNTB Corporation in October 2026 and includes the professional seal of Hans N. Conradt, a registered professional engineer in Oregon, with an expiration date of December 31, 2027.
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Text version
NEW HDPE
PIPE
UTILIZE HDPE MANUFACTURED
"TEE" FITTING FOR CONNECTION
TO NEW HDPE PIPE.
NEW HDPE PIPE AT
45° FOR 12" MIN.
CONNECT PIPE TO STRUCTURE
USING NON-SHRINK CEMENT GROUT.
CONNECTION TO BE WATER TIGHT
WALL OF CATCH
BASIN/MANHOLE
STRUCTURE
CORE PIPE
O.D.+2" DIA.
HOLE FOR
PENETRATION
OF STRUCTURE
WALL
1" 1"
NEW 12" HDPE LATERAL CONNECTING
PIPE FROM CATCH BASIN
UTILIZE HDPE MANUFACTURED
"WYE" FITTING FOR CONNECTION
TO NEW HDPE PIPE
NEW HDPE
PIPE AT 45°
FOR 12" MIN
UTILITY (PIPE, DUCT, ETC.)
UTILITY (PIPE, DUCT, ETC.)
LOCATE
LOCATE COIL WITHIN ONE FOOT OF OPENING. LABEL "LOCATE".
STRUCTURE REFERS TO INLETS, CATCH BASINS, MANHOLES,
HEAD WALLS, VALVE BOXES, VAULTS, HAND HOLES, JUNCTION
AND PULL BOXES, AND SIMILAR ACCESS DEVICES.
GRADE GRADE
1' -0
1' -0
2' COIL AND UTILITY
LOCATE WIRE TAG
SEE KEY NOTE
WARNING TAPE
SUBGRADE
(PAVED AREAS)
STRUCTURE
OPENING
10 GAUGE XHHW
COPPER STRANDED
LOCATE WIRE
1' COIL
FASTEN WIRE
AS REQUIRED
STRUCTURE
WALL - SEE
KEY NOTE
1' COIL
BACK FILL
2' COIL
10 GAUGE XHHW COPPER STRANDED
LOCATE WIRE. WIRE TO BE PLACED
OVER CENTERLINE OF UTILITY
WARNING TAPE
2' COIL
BACK FILL
KEY NOTES:
LOCATE
NEW OR
EXISTING PIPE
NEW 6" HDPE CONNECTING PIPE
FROM UNDERDRAIN SYSTEM
UTILIZE WATERTIGHT
COUPLING FOR
CONNECTING
TO EXISTING PIPE
45° BEND
45° BEND
PI
PE
O .D
NOTE:
1. FASTEN LOCATE WIRE TO UTILITY (TOP
CENTERLINE) USING NON-CONDUCTING
TIES OR OTHER SUITABLE MEANS. FASTEN
AT SUFFICIENT NUMBER OF LOCATIONS TO
ENSURE WIRE WILL REMAIN IN PLACE.
NOTE(S):
1. THIS DETAIL TO BE USED UNLESS SPECIFIC
INVERT ELEVATIONS FOR THE CONNECTING
PIPE ARE GIVEN ON THE PROFILES.
NOTE(S):
1. THIS DETAIL TO BE USED UNLESS SPECIFIC
INVERT ELEVATIONS FOR THE CONNECTING
PIPE ARE GIVEN ON THE PROFILES.
SCALE:
TEE CONNECTION FROM CATCH BASIN
TO NEW HDPE STORM LINE
N.T.S.1
10/6/2026
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lig ht da rk gr ay bl ac k
DESIGN NUMBER PROJECT NUMBER
2"
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gr ay
1:49:42 PM NCHOWDHURY c:\users\nchowdhury\dc\accdocs\hntb corporation\88598 - pdx north runway rehab\project files\shared cad\sheets - civil\storm drainage details.dwg
DISC. SHT. NO.
DRAWING SCALE IS REDUCED 50% WHEN SHEET SIZE IS 11" x 17"
DESIGN BY
DRAWN BY
CHECKED BY
DATE
SHEET NO.
SUBMITTED BY
DRAWING NO.
TYPE:
1/
4" 1/
2" 1"
1/
4" 1/
2" 1"
DATE BY REVISION APPDATE BY REVISION APP ##
IF ELECTRONIC SIGNATURE IS BROKEN OR MISSING - THIS IS NOT A LEGAL DRAWING
PORTLAND INTERNATIONAL AIRPORT
NORTH RUNWAY REHABILITATION
STORM DRAINAGE AND UNDERDRAIN DETAILS 3
GENE TUPPER
C. EISELER
N. CHOWDHURY
H. CONRADT
OCTOBER 2026
160 CD
PDX 2026-501 C9.092024D011 102981
SCALE:
PIPE CONNECTION
TO CATCH BASIN/MANHOLE
N.T.S.2 SCALE:
CONNECTION FROM UNERDRAIN SYSTEM
TO NEW HDPE STORM LINE
N.T.S.3
SCALE:
TYPICAL UTILITY LOCATE DETAIL
N.T.S.4
RE
G ISTERED PROFESS IONALENG I NEER
MARCH 9 , 1999
60434PE
OREGON
12/31/27EXPIRES:
HA NS N . CONRA DT
| 2026-10-06T17:40:20-0700 | |
| Hans N Conradt |
File details come from the government source that posted it. Updated .