B09_Amd8_-_Drawing_02-C7_5_Dec2025_0008.pdf
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- Solicitation number
- 140P2025R0082
About this file
This is a technical drawing sheet for wastewater infrastructure detailing the lift station section for the Deva Water and Wastewater System Rehabilitation project at Death Valley National Park. The drawing (Sheet C7.5, Drawing No. 318717) provides elevation views of the lift station wet well and overflow tank configuration, specifying critical design parameters and equipment requirements.
The lift station design requires an Everlast 4000 Series Duplex pump station equipped with Smith & Loveless 4B2D*1 pumps or approved equal, capable of handling 250 gallons per minute at 83 feet of total dynamic head with 15 horsepower, 480-volt, 3-phase motors. The pump must pass solids up to 3 inches in diameter with a 9.125-inch impeller trim. The system incorporates a 6-foot diameter, 13-foot deep precast lift station wet well with a 15,000-gallon precast overflow tank, both requiring compacted backfill per specification section 31 23 33. Critical operational elevations include lead pump on at -184.70, lag pump on at -183.20, pumps off at -187.20, high level alarm at -179.23, and low level alarm/redundant off at -188.20. All internal plumbing for the wet well and valve vault must be epoxy-coated stainless steel, with link-seals installed at all concrete penetrations. The maximum suction lift is specified at 20 feet, and the volume between lead pump on and pumps off must equal or exceed the pumping rate per minute. Additional details reference architectural sheets, plan views, and specification section 33 32 00 for complete equipment requirements.
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Text version
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DATE:
DESIGNED:
TECH. REVIEW:
SUB SHEET NO.
PMIS/PKG NO.
DRAWING NO.
SHEET
OF
TITLE OF SHEET
178069
318717
DATE:
DESIGNED:
TECH. REVIEW:
SUB SHEET NO.
PMIS/PKG NO.
DRAWING NO.
SHEET
OF
TITLE OF SHEET
WASTEWATER DETAILS
LIFT STATION SECTION
178069
311 513
V. NEARY
V. NEARY
C. WEAVER
1.17.2025
DEATH VALLEY
NATIONAL PARK
318717 02-
C7.5
8" SDR 35 PVC INLET
FROM SSMH-CC-101
INVERT ELEV. = -181.67
DISCHARGE
8" HDPE FORCEMAIN
INVERT ELEV. = -182.76
PUMP SUCTION OPENING,
6" INCREASING ELBOW
SLOPE CONCRETE TO
PUMP SUCTION
4" GATE VALVE FOR DRAINING
OVERFLOW TANK INTO WET WELL
15,000-GALLON PRECAST
OVERFLOW TANK
30" DIA. ACCESS RISER
FOR OVERFLOW TANK,
TYP.
6' Ø - 13' DEEP PRECAST
LIFT STATION WET WELL
PROPOSED BUILDING SLAB
PROPOSED BUILDING
FOOTER
WET WELL
ACCESS HATCH
LIFT STATION PUMPS
PUMP MOTORS
LIFT STATION PUMP
CONTROL ROOM
PROPOSED LIFT STATION BUILDING
SEE ARCHITECTURAL SHEETS
FLAPPER VALVE FOR
OVERFLOW LINE
6" SCH 40 PVC WET
WELL OVERFLOW LINE
2% SLOPE MIN.
NTS
A
C7.5
LIFT STATION WET WELL AND OVERFLOW TANK ELEVATION VIEW
FOOTNOTES:
PUMP STATION TO BE EVERLAST 4000 SERIES DUPLEX WITH SMITH & LOVELESS
4B2D*1 PUMPS OR APPROVED EQUAL
· PUMP DESIGN CONDITION: 250 GPM @ 83FT TDH
· PUMP MUST BE CAPABLE OF PASSING SOLIDS 3" IN DIAMETER.
· PUMP MOTOR IS 15 HP - 480V 3-PHASE
· IMPELLER TRIM OF 9.125"
ALL INTERNAL PLUMBING FOR WET WELL AND VALVE VAULT TO BE EPOXY COATED
STAINLESS STEEL.
NOTES:
1. SEE SHEETS C5.6, C8.21 AND C8.22 FOR PLAN VIEW, AND GENERAL ARRANGEMENT
OF STATION. PROFILE VIEW DOES NOT REFLECT ACTUAL OVERFLOW TANK AND WET
WELL ARRANGEMENT.
2. LINK-SEALS ARE TO BE INSTALLED AT ALL PENETRATIONS IN CONCRETE FOR PIPE
AND CONDUIT.
3. VOLUME BETWEEN LEAD PUMP ON AND PUMPS OFF SHOULD BE EQUAL TO, OR
GREATER THAN, THE PUMPING RATE PER MINUTE.
4. MAXIMUM SUCTION LIFT IS 20FT
5. SEE SPECIFICATION SECTION 33 32 00 FOR EQUIPMENT REQUIREMENTS.
6. BACKFILL AROUND WET WELL AND OVERFLOW TANK SHALL BE PER SPECIFICATION
SECTION 31 23 33.
4" SCH 40 PVC DRAIN FROM VALVE
VAULT WITH FLAPPER VALVE
2% SLOPE MIN.
PUMPS OFF ELEV. = -187.20
HIGH LEVEL ALARM ELEV. = -179.23
LOW LEVEL ALARM / REDUNDANT OFF
ELEV. = -188.20
6" EPOXY COATED STAINLESS
STEEL SUCTION PIPING
FLOAT WEIGHT TYP.
LEAD PUMP ON ELEV. = -184.70
6" LINK SEAL, TYP
4" LINK SEAL, TYP
8" LINK SEAL
INVERT ELEV. = -178.73
INVERT ELEV. = -187.66
FINISHED FLOOR
ELEV. = -176.70
WET WELL FLOOR
ELEV. = -189.70
CHECK VALVE
AND PLUG VALVE
ASSMEBLY
STAINLESS STEEL FLOAT BRACKET
LAG PUMP ON ELEV. = -183.20
INVERT ELEV. = -179.61
INVERT ELEV. = -186.78
COMPACTED BASE MATERIAL
SEE NOTE 6
| Sheets and Views |
| WASTEWATER DETAILS 6 |
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