Water / Wastewater

Pump & Lift Stations

*Wet-well, dry-pit and submersible stations from neighborhood lift stations to regional raw water and stormwater pumping facilities.

Overview

What we deliver

Pump stations are compact, complex and unforgiving. Within a footprint of a few thousand square feet, we have to build deep structures under groundwater, set heavy equipment to close tolerances and deliver a station that starts the first time. We have built 82 pump and lift stations ranging from 0.5 MGD neighborhood facilities to 120 MGD regional pumping stations.

Deep excavations and dewatering

Wet wells and valve vaults often sit 30 to 60 feet below grade in poor soils with a high water table. We use secant pile walls, sheet-pile shoring, caissons and sunken-shaft methods, with well-point and deep-well dewatering designed by our geotechnical consultants. Excavation support is monitored with inclinometers and survey points reported weekly to the owner.

Mechanical and electrical integration

Large vertical turbine pumps, horizontal split-case pumps and submersibles are set, aligned and grouted by our millwrights, with vendor representatives on site for start-up. Pipe galleries are fabricated in ductile iron, steel and stainless steel with flexible couplings and restrained joints designed to resist surge pressures.

Our electrical partners install motor control centers, variable-frequency drives, standby generators and SCADA systems. We coordinate full-load testing with the utility and the owner's operators, including surge analysis verification and run-time documentation.

Scope

Wet wells, dry wells and valve vaults
Secant pile, sheet pile and caisson excavation support
Dewatering design and implementation
Vertical turbine, split-case and submersible pump installation
Pipe galleries, check valves and surge control
Standby generators, MCCs and VFDs
SCADA, telemetry and level instrumentation
Force main tie-ins and bypass pumping

Technical

Buoyancy checks and temporary dewatering
Pump alignment, vibration and grouting per Hydraulic Institute
Surge analysis and slow-closing valves
Restrained joints, flexible couplings and thrust blocks
Hazardous-area electrical classification
Ductile iron (DIP), steel and stainless piping
Seismic anchorage of equipment
Field testing: hydrostatic, megger and full-load run tests
Telemetry and radio path survey

Delivery: Design-Bid-Build, CM/GC, Design-Build
Typical value: $5M–$25M
Self-performed: Yes

Questions

Frequently asked questions

01 How do you handle flow during the cutover?

We build the new station offline when possible, then complete the cutover with bypass pumping sized for peak flow and tested before we break into the existing system. The cutover plan is reviewed with operators and emergency staff.

02 Do you install the pumps yourselves?

Yes. Our millwrights and pipefitters set, align and grout the pumps under supplier supervision. Electrical and controls are generally subcontracted to long-term partners.

03 What is your experience with deep excavations?

We have built wet wells to 62 feet deep in saturated alluvial soils using secant pile and caisson methods. We monitor the support system daily and share data with the owner.

04 Can you replace several stations under one contract?

This is common. Our Basin 7 Lift Station Program replaced seven stations in three years under a single CM/GC agreement, using standard designs and repeatable crews to cut cost and schedule.