Pump Stations
Prospect Construction, Inc. was founded with a focus on water and wastewater treatment plants and pump station, and today, we maintain a relentless pursuit of excellence and growth in this area. The vast experience of Prospect’s team members has allowed us to successfully complete some of the most challenging projects in the water and wastewater construction field, most of which have involved improving existing plants and pump stations, while maintaining the operation of existing facilities. Our highly skilled personnel have the ability to look ahead, resolve problems, work effectively with clients, and make your project a success.
Keystone Projects
Ship Canal Tunnel Storage- Seattle, WA
Seattle Public Utilities - Subcontractor to Lane Construction
Engineer: Brown & Caldwel
PCI served as the mechanical and concrete subcontractor for this project, which consists of four vertical shafts designed to convey CSO flows to the main storage tunnel. The shafts reached depths of up to 95 feet and included intermediate decks, stairs, and extensive process mechanical systems. The scope of work also included near-surface diversion structures, tunnel adits, vortex shafts, plunge pools, and mechanical vault structures housing process mechanical equipment, electrical gear, and odor control systems. PCI formed and poured 3-foot-thick shaft radius walls with concrete roofs, 2-foot-thick underground one-sided and two-sided vault walls, and various supporting structures throughout the project. Construction utilized a range of specialized forming systems, including Peri GRV tie-less circular formwork, Peri SB braced one-sided wall forms, Peri Duo wall forms, snap-tie handset systems, Aluma gang and deck forms, and Doka Super Prop deck shoring. The project included approximately 10,000 cubic yards of concrete for the Ship Canal work.
Highland Hanover Irrigation District System Improvements – Washakie County, WY
Highland Hanover irrigation District- Desing- Bid- Build
Engineer: Western Heritage Consulting & Engineering
Replacement of the water conveyance infrastructure of the existing Highland Hanover irrigation pump station, improvements to the building electrical and mechanical systems, and exterior site improvements. The existing pump station conveyance improvements include replacing existing pumping equipment with two new 800 HP vertical turbine pumps capable of 20,200 GPM each and two 60 HP pumps capable of 3,300 GPM each Installation of new piping, valves, controls equipment, with structural reinforcing to the building’s concrete floor, installation of a meter along existing discharge pipes with a new manhole structure, and electrical service upgrades. Site improvements include embankment erosion control and site grading for improved stormwater drainage around the site. PCI had to coordinate closely with the irrigation district to complete all work over the winter during the irrigation off season to ensure there were no impacts to the local agricultural areas.
South Park Pump Station- Seattle, WA
City of Seattle- Design-Bid-Build
Engineer: Brown & Caldwel
The project consists of construction of a pump station and site work. The pump station included cast-in-place wet well, four submersible pumps, a discharge headbox, a separate electrical building and bathroom, and the installation of an owner furnished backup generator. Site work included grading, paving, influent/ effluent piping, fencing, vibration and settlement monitoring, and landscaping.
Great Falls Sewage Lift Station No. 1 and Supplemental Forcemain Improvements –Great Falls, MT
City of Great Falls- GC/CM
Engineer: TD&H Engineering
The Great Falls GC/CM project involved an extensive, 18-month preconstruction process, where Prospect Construction assisted TD&H Engineering in progressing the design from the 10% design milestone to Final Design. Preconstruction Efforts focused on eliminating project cost and inefficiencies through the evaluation of alternate means & methods, alternate design concepts, and cost/benefit analyses on various features of the design. The project consists of two phases, Phase 1 involving upgrading the facility processing capacity, and Phase 2 involving the boring of 24" HDPE under the Missouri river to provide a redundant forcemain for conveyance of approximately 40% of the City's Wastewater inflows both project Phases 1 and 2 were evaluated and improved based on input from Prospect Construction and industry partners allowing for significant cost decreases from the original 30% probable cost estimate. The Construction Contract for Phase 1 was awarded to Prospect Construction in the Fall of 2024, while Phase 2 is currently pending additional funding.
Phase 1 includes the replacement of three 200 horsepower 24" vertical turbine pumps with automated pump control valves, a permanent 16" ductile bypass line hot-tapped into the existing river crossing allowing for the Phase 2 river crossing installation, a permanent backup generator system, new bar screen and wash press installation through the facility roof, flow channel modifications to allow internal facility bypassing, new flow control mechanisms including gates and stop logs, 24" site pipe and valve vault installation requiring construction dewatering and alternate shoring methods, and electrical upgrades including new distribution equipment, transfer switches, utility equipment, and variable frequency drives.