B09_Amd8_-_QR22_Attach_Drawing_00-C7_1_Jan2026_0008.pdf
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- Solicitation number
- 140P2025R0082
About this file
This is a technical drawing document containing wastewater system details for Death Valley National Park, specifically detailing sanitary sewer manhole construction and combination air release valve specifications. The drawing set is dated January 17, 2025, with drawing number 307 513, sheet C7.1, and PMIS/PKG number 178069, prepared under project 318717 for the Deva Water and Wastewater System Rehabilitation project.
The document provides construction specifications for three primary components: (1) Cast-in-place manhole base details requiring minimum 8-inch thickness concrete foundations with reinforcement (3-#4 hoops, #3 bars at 12-inch centers maximum, and #4 bars at 12-inch centers), water stop grouting rings, and flexible pipe-to-manhole connectors using FERNCO STRONGBACK RC 100 or equivalent couplings; (2) Sanitary sewer manhole typical details for 48-inch diameter precast sections with eccentric cones, non-corrosive rungs, ASTM C990 flexible joint sealants, and manhole rings/covers supplied by D&L Supply Co (Model A-1172-01 cover and A-1172-R5 ring or equivalents), with specific rim elevation requirements depending on paved versus non-paved locations; and (3) Combination air release valve assembly for sewer force mains utilizing Valmatic Model VMC-802A valves (or accepted equivalents), 2-inch heavy-duty full-port brass ball valves, and 3/4-inch galvanized relief lines. All construction must conform to ASTM C478 standards for manhole specifications, with core drilling required for penetrations and jack hammering prohibited. Minimum flow slopes of 1/10-foot for straight channels and 2/10-foot for angles exceeding 45 degrees are mandated.
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DATE:
DESIGNED:
TECH. REVIEW:
SUB SHEET NO.
PMIS/PKG NO.
DRAWING NO.
SHEET
OF
TITLE OF SHEET
WASTEWATER DETAILS 143
178069
307 513
T. FRANCIS
T. FRANCIS
M. WHELEHON
1.17.2025
DEATH VALLEY
NATIONAL PARK
318717 00-
C7.1
48" DIA.
24"
6" (TYP)
RIM ELEVATION ADJUSTED WITH
CONCRETE GRADE RINGS, 20"
MAX. HEIGHT
RING AND COVER
BENCH SLOPE MIN.
2" PER FOOT
6" BASE
EXTENSION
FLOW CHANNEL
BASE ROCK, 6" MIN.
THICKNESS 95%
COMPACTION
PRECAST SECTION
(TYP.)
ECCENTRIC CONE
NON-CORROSIZE
RUNGS
ALL JOINTS SEALED WITH
ASTM C990 FLEXIBLE JOINT
SEALANT
WRAP ALL EXTERNAL
JOINTS WITH ASTM C877
MEMBRANE WRAP
FRAME AND GRADE RINGS
SEALED WITH NON-SHRINK
GROUT OR FLEXIBLE JOINT
SEALANT
FLEXIBLE PIPE-TO-MANHOLE
CONNECTOR, GROUTED IN
WITH NON-SHRINK GROUT
VIEW FROM TOP
1/2" SEE NOTE 5.
SLOPE TO SPRING LINE
PIPE STUBBED INTO M.H
6" TO 8"
48" DIA.
6" MIN.
BENCH SLOPE MIN.
2" PER FOOT
WATER STOP GROUTING RING
FERNCO STRONGBACK RC 100 OR
EQUIVALENT COUPLING TO BE 2' TO 3'
FROM MANHOLE WALL.
FILL CONCRETE
AROUND PIPE AT
WALL
8"
3 - #4 HOOPS
#3 BARS, 12" CC MAX.
#4 BARS, 12" CC (EW)
1 - #4 HOOP
2 - #4 HOOP 3" MIN.
4"
4"
2"
8" MIN.
4"
LAP 10"
NOTE: ALL REINFORCEMENT SHALL BE 2" CLEAR OF
NEAREST FACE OF CONCRETE, UNLESS OTHERWISE
SHOWN.
B
35 5 16"
B
MANHOLE RING AND COVER
TOP VIEW
SECTION B-B
24"
8"
(x2) 1"Ø PICK HOLES
COVER: D&L SUPPLY CO
A-1172-01 OR EQUIVALENT
RING: D&L SUPPLY
CO A-1172-R5 OR
EQUIVALENT
NOTES:
1. POURED-IN-PLACE OR MAY BE USED IF SPLICING INTO EXISTING SEWER LINE.
POURED-IN-PLACE BASE: MINIMUM THICKNESS MUST BE 8 INCHES. PRECAST BASE:
MINIMUM THICKNESS MUST BE 8 INCHES,
2. AT A MINIMUM, MANHOLES SHALL CONFORM TO ASTM C478.
3. THE POURED-IN-PLACE CONCRETE BASE MUST START OUTSIDE THE MANHOLE AND
MUST BE A MINIMUM OF 8 INCHES DEEP UNDER THE MANHOLE WITH A COLLAR
AROUND THE PIPE, AS SHOWN IN THE DETAILS.
4. POUR-IN-PLACE BASE AND BENCH FILL MAY BE POURED MONOLITHICALLY.
ONE-HALF INCH SPACING SHOWN IN THE DETAILS MAY OMITTED WHEN BASE AND
FILL CONCRETE ARE POURED MONOLITHICALLY. BASES SHALL BE CURED A
MINIMUM OF (3) THREE DAYS PRIOR TO STACKING MANHOLE.
5. ALL MANHOLE PENETRATIONS SHALL BE PRECAST OR MADE BY CORE DRILLING.
JACK HAMMERING OF OPENINGS IS NOT PERMITTED.
6. INVERT PIPE ELEVATIONS IN AND OUT OF THE MANHOLE ARE SHOWN ON SEWER
PLAN AND PROFILE SHEETS. ESTIMATED PIPE INLET/OUTLET ANGLES ARE SHOWN
ON DETAIL SHEETS.
7. ALL FLOW ACROSS MANHOLES SHALL BE A MINIMUM OF ONE-TENTH (1/10') OF A
FOOT FALL FOR STRAIGHT CHANNELS AND TWO-TENTHS (2/10') FOR ANGLES
GREATER THAN 45 DEGREES.
8. IN NON-PAVED OR NON-ROADWAY AREAS, SET MANHOLE RIM 2" ABOVE GRADE.
9. IN PAVED AREAS OR WITHIN A ROADWAY, SET MANHOLE RIM 1/4" BELOW GRADE.
10. ALL MANHOLE LIDS SHALL BEAR "SANITARY SEWER" MOLDED INTO EXTERIOR
SURFACE.
NTS
B
C7.1
SANITARY SEWER MANHOLE - TYPICAL DETAIL
NTS
A
C7.1
CAST IN PLACE MANHOLE BASE DETAIL
A
A
SECTION A-A
NTS
C
C7.1
COMBINATION AIR RELEASE VALVE
SEWER FORCE MAIN.
SEE PLAN AND PROFILE
SHEETS FOR PIPE SIZE.
4'-0"
UNION
3/4" GALV. RELIEF LINE (LOCATION WILL BE
DETERMINED IN THE FIELD)
18"
30"
COMPOSITE SIDE-LOCKING LID
LABELED "SEWER"
TWO SS STRAPS
C.I. FRAME
24 SS MESH
CORROSION-RESISTANT SCREEN
(3) 4" X 8" X 16" SOLID
CONCRETE BLOCK ON
UNDISTURBED EARTH
SADDLE TAP TO
FORCE MAIN (TYP.)
VALMATIC COMBINATION
VALVE MODEL VMC-802A
OR ACCEPTED EQUIVALENT
2" HEAVY DUTY FULL PORT
BRASS BALL VALVE (TYP.)
2" THREADED BRASS
NIPPLE (TYP.)
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