Services - MGC Contractors

Well Drilling & Equipping

Site 71 Well Replacement

2016 ACEC – Engineering Excellence Grand Award!

As the Construction Manager at Risk for this Scottsdale project, MGC was responsible for drilling and equipping this replacement well which was part of a pump and treat operation for the Indian Bend Superfund Site. The facility was drilled and equipped within 100 feet of private residences and no complaints were lodged due to the efficient sound barrier system that was used while drilling the well. The well now operates in a sound proof enclosure and is a neighborhood friendly facility. The old Well 71 was capped and abandoned in place upon completion of the replacement well.

Trinity Well Field Equipping
MGC was New Braunfels Utilities’ first Construction Manager at Risk. We equipped four very deep (greater than 1,000 feet) raw water wells that allowed the owner to access a lower aquifer not yet taxed by rapid growth in the area as was the upper aquifer. MGC returned $700,000 of the initial Guaranteed Maximum Price to the owner on this project by finding cost efficiencies after project award.

Water Treatment

Trinity Well Field Treatment Plant

MGC was selected for a New Braunfels Utilities (NBU) CMAR project which consisted of preconstruction services including constructability reviews, design evaluations, scheduling, cost models, value engineering, early procurement packages, bid packages, value added, procurement evaluations and recommendations, provided guidance for CMAR protocols and open book GMP. The original schedule for this project was fast paced as NBU required the site to be operational as soon as possible with limited design completed. MGC partnered with the NBU team and Freese and Nichols Engineering providing project completion from Preliminary Engineering Review, to functioning water treatment plant in 17 months.

C.C. Cragin Reservoir Water Supply

2020 AZ Water – Treatment Plant of the Year!

MGC delivered a 5.5 MGD water treatment plant to the Town of Payson. The plant is fed from the natural spring water at the CC Cragin Reservoir. Due to the elevation and topography, a hydroelectric generator was installed to eliminate high head pressure while providing electricity for plant use. The project included a concrete flocculation tank, an engineered metal building, a microfiltration system (4 filters – 86 modules), a CIP/backwash system, chlorine generation, water pumps, a process air system, distribution pumps, and a fully automated PLC/MCC line up. The project also included construction of a .5 MG post tension concrete water reservoir. Steel and iron were 100% domestically sourced and fabricated, adding focus on procurement.

Arsenic Removal

Groundwater Treatment may include the removal and abatement of various contaminants. Among these, MGC is especially adept at constructing systems for the removal of Arsenic and Nitrates.

Correctional Facility Arsenic Treatment
MGC, as the design-bid-build General Contractor, replaced 6-10’ diameter Arsenic adsorption vessels, media, pipelines and backwash tank for a State Prison in Texas. Security was of the utmost importance and no project related security incidents occurred.

Osborne Water Plant Arsenic Treatment
MGC, as the Construction Manager at Risk, constructed a new water production facility that included 2 ground water wells, coagulation and filtration Arsenic treatment plant, 2.5 MG below grade post tension reservoir, 5 MGD vertical turbine booster pump station (located on top of the post tension reservoir), disinfection system and 5 miles of distribution pipelines.

Bullard Water Treatment Plant

This new 3.5 MGD Reverse Osmosis Facility delivered with design-build to treat high TDS/Nitrate well water and blend in an existing water storage tank for the City of Goodyear, Arizona. This facility allowed the owner to significantly reduce the TDS in their water distribution system and was delivered via design-build by MGC Contractors. MGC constructed this design build reverse osmosis water treatment plant and experienced 687 days of work without a lost time accident.

Water Reservoirs

Anderson Pump Station and Reservoir
MGC, as the design-bid-build General Contractor, constructed this high service pump station expansion and well site upgrade for San Antonio Water System. This 15 MGD pump station expansion helped increase pumping capacity allowing for further development of surrounding communities. The expansion consisted of a 7.5-million-gallon post tension tank, 6 high service pumps, new flow meters and electrical building including new motor control centers for each of the six high service pumps.

Church Farms East Reservoir & Booster Pump Station
MGC delivered a 3.0MG AWWA D110-Type 1 prestressed concrete reservoir and 3,000 GPM booster pump station. This prestressed concrete reservoir is the largest capacity reservoir that Town of Queen Creek has in its system to date. Due to the rapid growth of the Queen Creek area, the Church Farms East project is a momentous landmark that is now a crucial site for the residents in the area. Due to the importance of both the reservoir and the booster pump station, the reservoir has three potential sources to fill from including one onsite well that was fitted with a sound enclosure to accommodate the nearby neighborhood in sound mitigation. These water sources help to keep the concrete reservoir filled and the booster pump station supplying water to the community, in the event that one or more sources are shut down for maintenance.

Booster Pump Stations

Trinity Well Field Booster Pump Station
As the design-bid-build General Contractor, MGC constructed a new water plant and we performed site grading and drainage, paving, fencing, landscaping, equipped well pumps, well collection piping, post-tension ground water storage tank; 3.5 MGD high service pump station, disinfection facilities, electrical building and water distribution pipeline.

Booster Pump Station 179

2010 American Public Works Association – Project of the Year!

As the design-bid-build General Contractor, MGC built this project in the heart of the Scottsdale Arts District. An architecturally intensive structure, it includes four vertical turbine booster pumps a hydro-pneumatic tank, a backup generator, a water feature in the park for the performing arts and a public restroom.

This project helped Scottsdale to increase water pressure for fire protection needs in high rise buildings in the area. MGC delivered this project for less than the Guaranteed Maximum Price (GMP) and per the project schedule.

Lift Stations

OWRF AWRF Lift Station
MGC, as part of a Construction Manager at Risk team for the City of Chandler, constructed a 20 MGD wastewater lift station. The lift station wet well is huge at approximately 60’ x 30’ x 40’ deep. It is equipped with 7 submersible pumps and a bridge crane for maintenance. Supporting the lift station is an Oxy Fog odor control system and a 36” diameter pigging station.

North Pump Station
As the General Contractor for the City of Scottsdale on a design-bid-build project, MGC added fully enclosed 500 horsepower submersible pumps, new residual pumps and increased the backup power generation capacity. This upgraded the capacity of this very large lift station by 25%. The upgrade also included expansion of the electrical and control systems.

Pipelines

PW 2 Pipeline and Well Equipping Project
MGC was the General Contractor on this design-bid-build project for EPCOR Water in Texas. The project scope was to install 3000 LF of 36” ductile iron pipe and 200 LF of 16” pipe with 2 air release vaults and 2 blow off vaults along the line. The pipe tied the newly equipped PW-2 well pump into EPCOR’s existing pump station and cooling tower. The work also included a new well site which consisted of a 700 HP, 4 MGD well pump, an electrical pad and canopy structure, transformer pad and a new 480V switchboard.

Osborn Water Plant Distribution Pipeline
As the Construction Manager at Risk for the Salt River Pima-Maricopa Indian Community, MGC constructed over 5 miles of offsite finished water pipeline (ductile iron and C900 plastic), including 1.3 miles of 16″, 2.2 miles of 20″ and 1.7 miles of 30″. This pipeline was mostly in an undeveloped area which allowed MGC to achieve very high production rates.

Wastewater Treatment

Ak-Chin Water Reclamation Facility

2011 AZ Water Association – Wastewater Project of the Year!

As the General Contractor for Ak-Chin Indian Community, MGC constructed this state-of-the-art membrane biological reactor water reclamation facility in Southern AZ. Major elements of this project consisted of an entirely new campus including a laboratory, operations facilities and community offices. Process elements included a new headworks, 5 miles of sewer collection and water distribution piping, UV disinfection, a post-tensioned concrete reclaimed water storage tank and a solids belt filter press.

North and South Kuehler Wastewater Treatment Plant Upgrades

New Braunfels Utilities selected MGC as the Prime Contractor to construct aeration basins, a rapid mix basin, a new membrane thickening process (influent fine screens for membranes, dedicated membrane blowers, permeate pumps), dedicated digester blowers, associated electrical, piping and sitework for both plants, positive displacement blowers, a new MCC at the North Plant and a dissolved oxygen control system.

Odor Control

67^th Avenue Odor Control
As the design-bid-build General Contractor, MGC replaced a package odor control system with a soil bed odor control system including miscellaneous mechanical and electrical improvements. In addition, MGC rehabilitated the onsite lift station including all new piping, pumps, electrical and controls while utilizing existing systems for bypass during construction. This eliminated costly bypass pump rental and helped the City remain within budget.

Arrowhead Ranch WRF Improvements

MGC was selected as the CMAR to replace the existing headworks building, bar screens, washer compactors, and splitter box. Additional facility improvements included grit chamber rehabilitation, odor control system replacements, full plant electrical rehab for redundancy, and a new cloth disk filter system. The 9.0 MGD peak flows were successfully controlled by implementation of 30 separate MOPOs. The existing chemical scrubber/carbon tower odor control and associated ductwork systems were removed and replaced with a dual bio-trickling filter scrubbers and high Hydrogen Sulfide capacity carbon tower.

Water Reuse

Aquifer Storage and Recovery Well #5
MGC, as the Construction Manager at Risk for Fountain Hills Sanitary District, equipped an Aquifer Storage and Recovery (ASR) Well, installed a force main from the plant to the ASR well, installed the pump and piping at the plant and installed a sanitary sewer manhole and piping at the ASR well. This facility gave the District the ability to double the amount of recharge water they could store and feed to the famous Fountain Hills Lake.

Surprise Vadose Zone Recharge Wells
MGC, as the design-bid-build General Contractor, was contracted to install 13 vadose zone recharge wells capable of recharging 3.5 MGD and 2 additional wells were added by change order for a total of 15. This included approximately 2,200 feet of buried 16” and 24” piping, a flushing station and 15 wells complete with mechanical piping. The project also included converting the existing 5 wells from radio communications to fiber optics. The project was substantially complete months ahead of schedule.

Valve Maintenance

Treatment Plant Valve Maintenance
In 2011 the City of Scottsdale selected MGC Contractors to repair or replace valves at the following facilities: Scottsdale Water Campus, Chaparral Water Treatment Facility, North Indian Bend Wash Granular Activated Carbon Facility and Central Groundwater Treatment Facility. We successfully completed this contract in 2016 and repaired or replaced hundreds of valves. Generally, valves larger than 16” were rehabilitated and smaller valves were replaced for economic reasons. No unplanned outages occurred during this work.

Pressure Reducing and Air Relief Valve Maintenance
MGC is performing preventative maintenance on water system Pressure Reducing Valves (PRVs) and Air Relief Valves (ARVs) for the City of Scottsdale. We strategically schedule, inspect and record what parts are needed for the maintenance. Our specially trained staff opens each valve to replace all necessary interior parts (seals, seats, gaskets, floats, levers, etc.) with manufacturer repair kits and they thoroughly clean out the valve. We replace the fittings with new parts when they are worn out. Our goal is for the valves and fittings to be as reliable as possible when we leave each site. We maintain a large inventory of manufacturer repair kits and new ARVs so we are always prepared for upcoming preventative maintenance requests.

Disinfection

SAWS Dos Rios Chlorine System Improvements

In January 2019, MGC was awarded the contract to renovate the existing sanitation and dechlorination systems at the Dos Rios WRC. This includes brand new instrumentation and controls, feed equipment, and piping. SAWS operators now have 2 new RIO cabinets (1 Chlorine & 1 SO2), a new, expanded 7-57 Controller from Emerson, as well as 9 new Evaporators, 10 Chlorinators, and 3 Sulfonators, and various ancillary components, including 18 new Cylinder Scales, 2 new Overhead Coiling Doors, 13 new Unit Heaters, and a cutting-edge CL2/SO2 Leak Alarm System. Also, MGC installed 30,000 feet of new PVC and steel piping, dozens of pressure instruments, analytical devices, diffusers, and chemical injectors, just to name a few.

C.C. Cragin Reservoir Water Supply

2020 AZ Water – Treatment Plant of the Year!