Projects

Project includes the demolition of two existing 85’ clarifier mechanisms & internal components. Furnishings & installation of two new stainless steel 85’ clarifier mechanisms & internal components. Project is restricted to specific sequencing in which only one clarifier shall be out of service at any given time.

Project consists of installing a stainless steel inclined plate settler (complete with structural beam supports, plate settler pack(s), effluent launder, and collection trough) in each of the existing seven sedimentation basins to enhance treatment performance and increase capacity from 12.0 to 14.0 MGD.

The project includes the construction of a new 7 MGD vortex grit chamber including grit pumps and grit classifier, along with associated piping, electrical, and site work.  Project consists of replacing the mechanisms for two 50-ft diameter clarifiers including all associated electrical work.

Project included Surface Restoration of (3) prefabricated steel WWTP, (6) new blowers,
(1) new headworks structure with mechanical bar screen and associated electrical work.

Project consisted of (1) 60’ diameter poured in place aerobic digester, (1) 60’ diameter poured in place sludge holding tank, sludge loading station, DIP sludge transfer lines, (2) submersible pumps, (1) vortex valve, (2) floating decanters and (2) floating aerators, concrete repairs, site work and associated electrical work.

Project consisted of replacement of the tertiary filter system with a Cloth-Media Filtration System, structural modifications and repairs to the filter basin, installation of all piping, valves, weir gates, and appurtenances, along with Electrical and SCADA upgrades.

This project involves the replacement of 3 existing horizontal pumps with 2 new high capacity 450 HP pumps operating on new VFD’s at the University Lake Pump Station. Additional work will also be upgrading the existing 4160V switchgear with 480V switchgear, complete replacement of pipe gallery, modifications to the existing influent & discharge line, Electrical & SCADA improvements to include provisions for the future potassium permanganate feed system, complete roof replacement, & several other modifications to assist with OWASA’s continuous efforts to meet the community’s evolving needs for sustainable, reliable, and high-quality water, wastewater (sewer), and reclaimed water services.

Project consisted of replacement of two existing extended shaft dry-pit pumps and motors and two closed-coupled dry-pit pumps and motors: including valves, piping, electrical equipment, etc. with four 175 HP, VFDs, dry-pit submersible pumps, pump valves and piping, permanent bypass pumping discharge connection, electrical switchgear, motor control center and SCADA. The Project required a complete bypass of the 9.4 MGD pump station. By-Pass system included temporary control panels, VFDs, Diesel and Electric By-pass Pumps.

Project consisted primarily of rehab work to be performed on 2 pump stations at OWASA’s Mason Farms WWTP location. The IPS-1 rehabilitation involved upgrade of the building’s HVAC and electrical systems. Intermediate Pumping Station 2 (IPS-2) scope consisted of a new electrical room to house new electrical and SCADA equipment, including new service and distribution equipment, VFD’s, SCADA systems, and a portable generator connection. Each of the pump stations received a new roof, doors & window.

Project consisted of bypassing the pump station in entirety. Demolition and replacement of the following equipment: odor control units and associated ductwork, motor control room ventilation fans, louvers, heaters, MCC/Switchgear, PLC, & all interior lighting. Relocate 2 existing VFD’s. 18.5 MGD bypass system included a separate power service, installation of three (3) temporary variable frequency drives to operate the four (4) existing pumps, with no more than three (3) of the existing pumps operational simultaneously. Installation of a temporary PLC w/ communication to the Plant. The system was installed with an ATS so that the existing onsite generator could support the system in the event of power failure.

Project consisted of fabricating and installing a stainless-steel access platform approx. 66’x7’ over an active equalization tank and replacing (2) slide gates in an existing clarifier splitter box.

Upgrades made to the WWTP including new sludge baffle curtains, new chlorination and de-chlorination feed systems, control Gates, emergency generator, replacement of effluent pumps, internals and controls.

Improvements to the Westside sewer system PS including the addition of a 4th 200 hp dry pit pump, new seal water system, DIP header modifications, by-pass pumping, and relocating a surge valve and associated yard piping.

Project consisted of a 1.8 MGD redundant bypass system with chopper pumps to allow for replacing 10” Clay Pipe and 15” Clay Pipe with a 93 lf of new 18” DIP, new inline grinder with fiberglass manhole. Complete replacement of the existing lime conveyor. Installation of new main electrical switchgear and 750 KW standby power generator.

Project consisted of modifications and additions to convert an existing storage room to a VFD room, to include installation and commissioning of air handling unit, condensing unit, medium voltage variable frequency drive system for 700 HP motor, upgrade and replacement of existing pump station RTU and integration of proposed VFD, RTU and existing SCADA system.

The project also generally consists of the removal of existing horizontal split case pumps at both pump stations and the installation of new skids comprised of three pumps, associated fittings, a pump control panel, performance testing, and start-up services.

Constructed conversion of existing aeration basins to aerobic digesters, new digested sludge pumps,new sludge screw presses, new dewatered sludge pumps, new solar sludge drying beds, related sitepiping, grading, drives and all related appurtenances.

Project consists of the removal of (2) existing manual bar screens and replacement with channel-mounted electric grinders, power cables, controls, and lift-out system. Retrofitting existing openings above grinders and installation of access hatches and fall protection above grinders. Concrete rehabilitation and coating of channel interiors. Installation of (4) floor-mounted variable frequency drives, power cables, and controls. Removal and replacement of (4) motor controllers, associated power and control wiring, and raceways. Installation of new raceways for power cables, control wiring, and interior lighting. Coordinate instrumentation and control changes with equipment and electrical upgrades. All repairs, bypassing, and equipment installation to be performed while maintaining full operation of the PS. Rogerson Drive Pump Station is the second largest pump station in the wastewater collection system and is critical to overall wastewater flow management.

Project consisted of the demolition of existing air piping, 800LF of new 30 inch air distribution piping with control valves & bellows supported both overhead & underground. Approximately 120 LF of 16-inch temporary air bypass piping. This project was critical to resolving GUC’s identified issues with compressed air delivery to the South Aeration Basins. An energy efficiency study quantified energy losses in the air piping of over $172k /year.

Project included a new bridge supported sludge thickener structure and mechanism with supplementary controls, a complete sludge pumping station including two (2) submersible pumps, wet well, valve pit and station piping.

New Landfill Leachate Treatment Plant is a new Reverse Osmosis plant to replace their outdated system used to treat landfill leachate. Project included Influent and Effluent Pump Stations, Influent forcemain, Ultrafiltration units and (2) Reverse Osmosis Process units, Chemical Feed, PEMB, MCC, SCADA Laboratory and associated sitework.

Project Consisted of (2) New 100 HP high service vertical turbine pumps with associated controls, new concrete platform and aluminum stairs, new flow meter vault hatch and miscellaneous improvements inside the high service pump station building.

Project includes redundancy services for an existing WTP. Including two H.S. pump stations, Five 350 HP vertical turbine pumps in underground pump cans, MCC’s, VFD’s in two new buildings, 175 tons of 24” – 42” DIP U.G. yard piping w/precast meter vaults, valves and numerous tie ins. 30 tons of interior DIP piping – size 8” – 30”. 2300 L.F. of 12” PVC decant pipe to the Catawba River to include discharge piping and diffusers out into the river. 860 L.F. of 6” directional bore. Existing Lagoon – New submersible pumps, submersible mixers, floating decanters and divider wall. Project also included include electrical, site work, paving. PArt 2 of the contract consisted of 2,273 LF of 48″ DIP raw water force main including valves, tie-ins, and meter vault.

Replacement of (2) 150 HP submesible pumps at Intermediate PS, (3) new clarifier bridges, clarifer coating and repairs, new filter backwash pumps,comminutor, blowers and SCADA work.

New construction of a high service finished water Pump Station. This included (5) 400 HP Vertical Turbine Pumps with VFDs and associated switchgear. Project also included new electrical building to house (3) 600 HP VFDs with a 3000A switchgear with space for expansions for a separate HSPS. New Electrical Building was to service an existing pump station and replace the VFDs and Switchgear. Swap over involved well-coordinated shut downs in very specific sequence while keeping the existing PS on line. We also installed 175 tons of 24” – 42” DIP Yard Pipe w/precast meter vaults, valves and numerous tie ins and shut downs. 30 tons of interior DIP piping – size 8” – 30”. 2300 L.F. of 12” PVC decant pipe to the Catawba River to include discharge piping and diffusers out into the river. 860 L.F. of 6” directional bore. Modifications to the existing backwash lagoon with new submersible pumps, submersible mixers, floating decanters and divider wall. Also to include electrical, site work, paving, and 2,273 LF 48” DIP for raw water force main to include valves, tie-ins, and meter vault.

Project consisted of construction of a new sludge equalization basin with sludge pump station, new belt press building with belt press and conveyors, site piping.

Project consisted or a 3rd treatment train. Plant was poured in place concrete to house flocculation chambers, settling plates, gravity filters and clear well. Project also include the addition of air compressors, blowers, effluent pumps, SCADA and a new drying beds.

Project consist of removal and replacement of two existing 300 HP vertical centrifugal pumps with extended motors, new mechanical bar screen and screenings; washer/compactor in existing bar screen structure. New electrical building to house new MCC and VFD’s demolition and By-pass pumping to enable us to make the necessary tie ins and pump change outs. Site work, fencing and concrete paving.

The project consisted replacing the both of the filter control panels and the plants main control panel with out service interuption. Proejct also included adding or eplacing over 3 dozen motor operated valves, new flow meters, cheical feed and assocaited electircal work. Project reqired extinsive planning and coordination for over 10 timed shut down and tie ins.

The project consisted of moving an existing out of service Packaged Steel WWTP in Harnett Co. to the existing Town of Spring Hope’s WWTP facility 100 miles away. Major on site piping rerouting and abandonment of structures onsite. The project also included the addition of an Emergency Backup Generator to the existing site and new facilities. Additional work was initiated to replace the existing influent pumps and to update various motors and parts on existing equipment onsite for a fully functioning facility. Funding was provided by USDA, Rural Development, and the Town.

Construction of new stand alone Electrical building outside of existing Raw Water PS. New building house all new Switchgear, VFDs, controls sitework and retaining walls.

Removal of two 55’ Diameter Clarifiers and Installation of two new Suction Pipe type Clarifiers by Amwell. Installation also included all now FRP weirs and baffles. While the Clarifiers were removed concrete repairs were performed that consisted of a coating of with a repair mortar and an epoxy finish coat. A large portion of the project involved a complete renovation of the existing SCADA system which included 7 new RTUs, PLC Programming, New CPU station, Instrumentation and integrating existing instruments to the new system.

Installation of new lime silo with feed system, new water line, horizontal boring. Site work included Micropiles, grading and paving.

Project consisted of a filter air scour system for the WTP and misc. concrete repairs. Concrete repairs on the 2 million gallon finished water storage clear well, including: Removal of loose and disintegrated concrete, Preparation of the surface, Placement, finishing, and curing of repair concrete or mortar, and Application of concrete waterproofing and clear coating system.

Replacement of (4) 200 HP Influent Pumps and VFDs, New Pump Control Panel. Installation of Membrane diffusers at digesters, New SS Air piping and replacement of (16) 6″ Combo AR/PR Vacuum Valves on Effluent line.

Install new Brush Rotors, New chemical feed storage and pumps, new submersible mixers and influent pumps.

Project consisted of construction of new water treatment plant with pressure filter, softener, detention tank, aeration, masonry, operations building to house equipment, lab, chemical feed, yard piping, EQ basin, remote well sites (2), HVAC, paving, and grassing.

Project consisted of installation of 32 backup generators at individual pump stations throughout the Asheville water system. Of the 32 sites, 25 were fixed sites involving clearing, grading, demolition, site improvements including fencing, retaining walls and site piping along with major electrical and SCADA upgrades. 7 sites were prepped for a portable Gen Set. Largest site at Mills River WTP included the installation of a 2250kw Gen Set indoors with a remote radiator and 10k gallon AST Diesel Fuel System. A new switchgear system was installed that now allows the plant to run on generator power and can put reverse power on the grid. Project was value engineered prior to start and sites were released as easements and acquisitions were obtained.

Staged WTP renovations/additions, demolitions, new sed. Basin, filter rehab (8), new filters (4), existing filter building rehab & refurbishment, existing operations building rehab, new rooms & finishes, new chemical building, new plant chemical feed system new filter building, new flocculators, rapid mixers, R.W. intake, yard piping, yard & plant tie-ins, site work, paving, fencing, etc.

Project was the construction of aeration basin, headwork’s structure, influent, effluent, and RAS Pump Station including clarifiers, disk filters and contact chambers, sludge holding tank, aerobic digester, chemical feed and demolition of existing structures and process piping.

Project consisted of a new precast WWTP at a green field site. Project included, yard piping influent/effluent pump stations, chemical feed, aeration basins, digesters, non potable water system, clarifiers, disc filters and UV system.

Green site WWTP with Influent/Effluent Pump Stations, Splitter Box, Digesters, Clarifiers, Sludge Holding Tanks, Drum Filters, UV Structure, Blowers, SCADA, Laboratory/Electrical Building.

Project was the construction of 30’ deep Pump Station, Concrete Holding Lagoon, aeration, 7500 lf 16” DIP , 3500 lf and 6” PVC, Retrofit Existing Pump Stations, and site-work.