Space Innovation and Development Center Headquarters
City of Cambridge MA Department of Public Works Program
Piedmont Regional Wastewater Treatment Plant
Ince Resource Recovery Center
Denver Wastewater South Headworks & Grease Processing
Spokane Riverside Park Water Reclamation Facility
Tallahassee Thomas P. Smith Water Reclamation Facility
Santa Ana Wastewater Treatment Plant MBR Expansion
Avon Lake Regional Water Pollution Control Center
North Davis Biosolids Process Expansion
LL Anderson Dam Spillway Modification
Denver Water Hillcrest Reservoir Basin and Pump Station
Fremont Water Pollution Control Center
The Dannon Company Wastewater Pretreatment System
Lick Run Greenway
Clay Mills Sewage Treatment Works
Sellwood Bridge Project
Cape Coral Facilities/Utilities Expansion Program
Clark County Dual Media Filters Upgrade and Expansion
Austin Water Treatment Plant No. 4


  • Capital ConstructionCapital Construction
  • wastewaterWastewater
  • energyEnergy
  • waterWater
  • industryIndustry

Space Innovation and Development Center Headquarters


The Space Innovation and Development Center Headquarters (SIDC) is a 52,850-sf, one-story, communications facility that includes a Secured Compartment Information Facility (SCIF) of approximately 10,000 sf. The facility consolidates multiple group operations on Schriever Air Force Base (AFB) and Peterson AFB into a single facility comprising the SIDC of the US Air Force Space Command (AFSPC).

SCIFs are required to be unobservable and impenetrable from the outside, which entailed extraordinary security safeguards and innovative design and construction techniques. As a LEED-certifiable building, the project recycled more than 10 tons of construction waste that was diverted from the landfill equating to just under $800,000 of recycled materials.

High-risk activities included installing 25’ pre-cast concrete wall panels, placement of a 62,000-sf slab on grade concrete, placement of 40,146 sy of 8-in-thick concrete marshalling area, placement of 50,000 yards of rapid drain base course, and excavating and installing 5,000 lf of fewer piping.


  • One of the first major capital construction services projects undertaken by MWH Constructors.
  • A $19 million design-build project for USACE, Omaha District.
  • Saved an estimated eight weeks on the overall schedule using creative phasing of the DB packages.
  • Used locally manufactured products for nearly 20% of the total cost of materials.
  • Zero OSHA recordable cases and 170,000 work hours completed without a lost-time incident.
  • Recipient of the McGraw Hill, Mountain States, Gold Hard Hat Award, Best of 2010 Competition.
  • Recipient of the USAF Honor Award, facility design category, 2010.

Project Impact

  • We managed 30 subcontractors and exceeded small, disadvantaged and minority business subcontracting goals of 73.4%, achieving a high percentage of minority and disadvantaged firm participation.

City of Cambridge MA Department of Public Works Program


The City of Cambridge Department of Public Works program includes more than $90 million worth of area-wide reconstruction and separation of combined sewers, replacement of water mains, substantial gas main relocation, nearly 200 sites of private property work for inflow removal, and system wide verification of illicit removal from the storm drain infrastructure. MWH Constructors is leading three of the four active construction projects within the program. Our teams work side by side with the design staff to resolve construction issues at a pace that keeps up with the demands of each contractor’s schedule.

  • The work also includes full reconstruction of an entire urban neighborhood – roadway reconstruction, ADA sidewalks, porous asphalt systems, other green infrastructure and surface improvements.
  • 84% Reduction in Sewer Overflow.
  • This program includes the Alewife Reservation Stormwater Wetland project which won 4 National Engineering Awards including:
    • American Public Works Association (APWA) 2014 Projects of the Year in the Environment $25 million – $75 million category
    • Engineering News-Record’s (ENR) 2014 Best in Water/Environment: New England

Project Impact

  • Resulted in a reduction of the combined sewer overflows to the Alewife Brook by 85%; improving the water quality of the Alewife Brook, the Mystic River and the Boston Harbor.
  • Created new wetlands habitats in this brand new ecological man-made filtering system.
  • The project included significant biodiversity benefits to the area, bringing back some of the original wildlife. More than 100,000 wetland native plants were planted to stabilize the newly landscaped terrain, and more trees and plants were placed along the bike path and entry way.

Piedmont Regional Wastewater Treatment Plant


MWH Constructors built a new $42.4 million wastewater treatment plant to help the Saluda River meet new water quality standards. The new plant consolidated four 50+ year old treatment facilities – the Pelzer, West Pelzer, Piedmont, and Grove Creek—which had outfalls on the Saluda River and were taken out of commission upon the launch of the new regional facility.

Renewable Water Resources (ReWa) chose to utilize membrane bioreactor technology, allowing the treatment process to remove a higher level of nutrients, specifically phosphorus and nitrogen. The Piedmont Regional WWTP is the largest of its kind to use this type of technology in the state of South Carolina.

  • $5 million savings to client.
  • 560 days/31,682 hours without a lost time incident.
  • Awards:
    • 2013 Best Project’s Award of Merit in water and environment by ENR Southeast
    • 2013 CMAA South Atlantic Chapter Project Achievement Award
  • MWH Constructors’ volunteered through the completion of the project at the Pendleton Place Children’s Shelter in Greenville, SC.

Project Impact

  • Met new water quality standards for the community.
  • Promoted a cleaner environment and protected the public health/water quality.
  • Provided and developed the necessary sewer infrastructure for the growing economy.
  • Established 100 percent of the prime contracts with local contractors, supporting the local economy. with many new jobs and a significant amount of associated revenue.

Ince Resource Recovery Center


The MWH Treatment and Black & Veatch joint venture, MBV Energy Recovery, are constructing a $122 million waste-to-energy project in Cheshire, UK. Power on this facility is generated through and advanced gasification technology provided by Outotec Energy Products. It will be one of the final Advance Thermal Conversion Plants to be accredited under the U.K. government’s Renewable Obligation Certificate scheme. Following completion, MWH Treatment will provided operations and maintenance services under a separate contract.

  • A number of suppliers and subcontractors have been used from the local Cheshire / Merseyside.
  • MBV Energy Recovery, use an engineer, procure, construct (EPC) model, which is used to deliver complex infrastructure projects.
  • Export 21.5 MW of clean power.
  • Uses over 150,000 tons of wood waste to operate.

Project Impact

  • The renewable energy plant, developed by CoGen U.K., at Ince Park Resource Recovery Centre will export 21.5 MW (megawatts) of clean, affordable power, utilizing over 150,000 tons of wood waste that would otherwise go to landfill.
  • A number of constraints specific to the site have introduced challenges, which the project team has worked collaboratively to overcome. These include poor ground conditions (marsh with peat layers), protected ecological species, numerous watercourses and an adjacent COMAH (Control of Major Accident Hazards) facility. To overcome the ground conditions approximately 1,500 piles had to be driven to depths approaching 40 meters in some locations. Both the construction site offices and the permanent works include toxic refuge shelter, which can be used in the case of an ammonia leak from the COMAH facility.

Denver Wastewater South Headworks & Grease Processing


The Metropolitan Wastewater Reclamation District of Denver has embarked on an exciting fifteen-year journey to a sustainable future for its water reclamation facility serving its 1.8 million customers in the Denver metro region. MWH Constructors is the general contractor on this $52 million design-bid-build project consisting of improvements to the south headworks and grease processing for the Metro Wastewater Reclamation District.

  • Modifications to the existing South Bar Screen Building.
  • Demolition of the two, existing grit basins, and grit pump station.
  • Construction of South Grit Basins includes grit basins, grit pump station, and gritpiping tunnel.
  • Construction of the South Grit Handling Building.
  • Modifications to the Grease Processing Building.

Project Impact

  • This facility will enhance the quality and ecology of the South Platte River.

Spokane Riverside Park Water Reclamation Facility


Slayden, in a joint venture with MWH Constructors, is working on a $125 million upgrade to its Riverside Park Water Reclamation Facility. The upgrade will add a new filtration system at the plant, commonly called the Next Level of Treatment, and will greatly improve the quality of effluent that is released to the Spokane River. It will be designed to treat an average wastewater flow of 50 mgd. The project includes a new chemical facility, new primary clarifiers, a new primary solids pump station and modifications to the headworks, pumping facility and tunnels.

  • Will be the largest upgrade at the plant since 1970.
  • Will be one of the largest and most effective phosphate removal systems of its kind built in the U.S – removing more than 99% phosphorus.
  • The client had a budget of $35 million for Phase 1. Thanks to value engineering and constructability reviews, we found $3.9 million in savings, returning close to $4 million to the client. Phase 1 of the $126 million project is now costing the client $31 million.

Project Impact

  • This project is a major initiative to improve the health of the Spokane River. It will increase phosphorus removal from the effluent from 90% to 99%, which, in return, will help the oxygen levels in Lake Spokane, creating a more suitable environment for aquatic life.

Tallahassee Thomas P. Smith Water Reclamation Facility


The facility’s capacity was nearly doubled from 14.3 to 26.5 mgd, with a future upgrade to 30.5 mgd. The main project goal was to incorporate a more efficient enhanced nutrient removal treatment process to meet new environmental standards. These standards were not only met but exceeded State expectations.

This $172 million CMAR project for the City of Tallahassee, included preconstruction and establishing multiple GMPs, as well as the complete construction of facility upgrades. MWH Constructors tailored the project work packages to encourage participation by the local community. These outreach efforts provided employment to over 200 craft workers and created a substantial economic impact of more than $100M per year for the local Tallahassee economy.

  • Saved the owner $40 million.
  • 1 million work-hours were completed without a lost time incident.
  • Florida-based subcontractors constructed more than 72% of the total project.
  • Used fuel efficient hybrid vehicles and golf carts on the project site.
  • Recycled more than 95% of all concrete and steel construction debris saving 2,500 yards of concrete debris and 300,000 pounds of reinforced steel from entering a landfill.
  • The City of Tallahassee Underground Utilities Department was named 2013 Team Showcase Champion by the Florida Sterling Council for its outstanding achievement in implementing a nitrogen reduction program. This first place award was given in recognition of the City’s commitment to implement Advanced Wastewater Treatment (AWT) at the Thomas P. Smith Water Reclamation Facility (WRF).

Project Impact

  • As a supportive corporate partner, MWH Constructors donated $50,000 among the following Tallahassee charities: Children’s Home Society of Florida, Kids Incorporated of the Big Bend, Boys and Girls Club, American Red Cross, Mothers in Crisis, The Shelter, and Catholic Charities Christmas Connection. Each project team member also volunteered sixteen hours per year to one or more of these organizations.
  • Utilized sustainable construction wherever possible thereby being environmentally conscious to the surround community.
  • The water reclamation facility was able to reduce the nitrogen levels in the water to a record low which helps to improve the water quality of area lakes, streams and springs, preventing the growth of invasive plants, such as hydrilla and algae.

Santa Ana Wastewater Treatment Plant MBR Expansion


MWH Constructors, in a 65%/35% joint venture with Brycon Construction, was awarded a $19.7 million design-build contract to expand The Pueblo of Santa Ana’s wastewater treatment capacity to accommodate short and long-term growth. This project will ultimately increase the capacity of the existing WWTP in 2 phases with an initial 0.40 mgd (included in this contract) expandable to 0.80 mgd average daily flow to accommodate regional expansion for the next 20 years. We will utilize Membrane Bioreactor (MBR) technology providing a high quality discharge for reuse and capable of meeting New Mexico Class 1A.

This project won the 2018 AGC Build America Award and the 2017 Excellence in Construction Award from the ABC New Mexico Chapter.

  • Through the Design-Build delivery method, we were able to provide the pueblo with roughly $10 million in savings from the original concept.
  • We flipped the structure 180 degrees to take advantage of the natural landscaping and reduce excavation and backfill.
  • The original design called for 2 standby back-up generators. We were able to modify the design to provide a single source backup system. This saves on operation cost as you only have to maintain one piece of equipment.
  • Completed a virtual reality walkthrough with headsets before construction began. This walkthrough gave the owner the ability to see things such as the location and height of pipes and valves before construction began—when it was still economical to change the locations if necessary. This also gave an idea of how operators would work in the plant, giving us the ability to incorporate safety through design by looking at hand clearances and maneuverability.

Project Impact

  • Provided the Pueblo of Santa Ana the ability to grow and expand into the future.
  • Brycon-MWH Constructors realizes that employees are our most valuable resource which is why we are committed to not only hiring, but training and mentoring Native American community members and subcontractors where we are working.
  • Brycon-MWH Constructors believes in reducing environmental impact and energy costs in construction projects and encourage use of New Mexico building materials, sustainable technologies, and improved designs.

Avon Lake Regional Water Pollution Control Center


This is a $33 million hard bid project consisting of a new headworks facility, a new grit removal system, replacement of the primary sludge collection system with new chain and flights; a new alum sludge pump building and gravity thickener. The overall project also includes a new UV system, SCADA system, electrical, HVAC, plumbing, and fire protection systems.

  • After developing the pre-bid schedule, MWH Constructors concluded that the project duration could be shortened. We currently estimate that the project will be completed ten months ahead of schedule.
  • Additionally, the MWH Constructors team has been contracted as the CMAR to procure and Construct a 3.0 million gallon elevated composite tank.

Project Impact

  • Will provide more reliable water and wastewater service while reducing overflows into Lake Erie.

North Davis Biosolids Process Expansion


MWH Constructors served as the CMAR on this $49.4 million expansion project to increase the North Davis Sewer District’s digestion capacity. The project includes construction of a new primary sludge screening and thickening facility, a new cogeneration facility, new primary digesters, dewatering process expansion, and upgrades to the existing secondary digesters. MWH Constructors implemented and is currently overseeing all health and safety processes.

  • 100% of the plant’s process heating needs are met.
  • 65% of the plant’s total energy needs are met.
  • The District saves $35,000 – $40,000 a month.
  • 120,000 hours without a lost time incident.
  • MWH Constructors was able to add approximately $900,000 in additional value or scope changes.
  • This was the fifth CMAR/design-build project MWH Constructors has performed with this client.

Project Impact

  • With all of the new Biosolids Expansion Project upgrades, the North Davis Treatment facilities consistently removes more than 95% of pollutants from its wastewater flow before it is released into the Great Salt Lake, while generating energy and providing treatment capacity through the year 2035. The project team was dedicated to keep the work local – 100% of the work was constructed by local subcontractors and vendors.

LL Anderson Dam Spillway Modification


MWH Constructors was contracted to perform construction management for this dam project for the US Army Corps of Engineers, in partnership with MWH engineering’s design services. The 231-ft-high dam forms the 136,000 acre-ft French Meadows Reservoir and is part of the Middle Fork American River Project, FERC Project No. 2079. The dam was modified to bring it into compliance with current standards, which mandated that its spillway must pass the recently increased probable maximum flood in order to eliminate the possibility of overtopping failure of the dam.

The project included many sensitive environmental constraints and accessibility challenges due to its remote location and severe weather impacts. On-site aggregate and concrete production were among the innovative methods employed to complete the project on schedule and under budget.

  • $4.3 million in civil works design and construction management for dam project in USACE SPD area.
  • Awarded:
    • 2013 National Project Achievement Award (Construction Management Association of America)
    • 2012 Project of the Year in the $10 million – $50 million small agency division, in the structures category (American Public Works Association – Sacramento chapter)
    • 2011 Heavy Civil Construction Project of the Year
  • Provided hydraulic engineering expertise to focus and optimize spillway widening design efforts.
  • Utilized cutting edge digital photogrammetry techniques to efficiently map and evaluate spillway channel rock slopes.
  • Optimized channel widening design to eliminate benches in rock wall, saving approximately $900,000.
  • MWH Constructors construction cost estimate was within less than 1% of the successful bid.

Project Impact

  • Provided increased safety while continuing to bring clean water and sustainable power to the region’s residents.
  • Reduced the risk of catastrophic flooding.
  • Included improvements such as fencing to prevent public access to dangerous drop-offs in and around the spillway channel.
  • In addition to a new parapet wall on the upstream portion of the dam crest, a new guardrail was installed along the downstream side of the dam crest roadway, providing an upgraded roadway past the spillway structure and across the dam crest. Gates were added to the access roads in and around the dam and spillway site, restricting public access to areas potentially dangerous to those unfamiliar with the site.

Denver Water Hillcrest Reservoir Basin and Pump Station


In the early 1960’s, Denver Water originally constructed the Hillcrest water storage facility. Since the area’s population has continued to grow, it has placed increased demand on the storage and pumping facilities.

MWH Constructors was awarded a $100 million contract to provide facility upgrades that will increase water storage capacity by removing two existing storage basins with a combined capacity of approximately 30 million gallons and replacing them with three new circular concrete tanks with a combined capacity of approximately 45 million gallons. Construction also includes the replacement of the existing pump station with a new facility.

  • Savings of $2 million with Value Engineering.
  • Exceeding MBE/WBE goal.
  • Extensive public outreach program was established.
  • Denver Water provided discounted water rates after first phase for affected neighbors.
  • Window cleaning service provided to adjacent properties.
  • Improved fencing including installation of sound attenuation blankets on the new fences.
  • Enhanced final landscaping to provide a nicer environment.

Project Impact

  • 5% of the works is being done by local businesses.
  • “This project is a good example of Denver Water investing in the future of our system, so when you turn on your tap you don’t have to think twice about it. These tanks should have a life expectancy of 100 years.” – Martin Garcia, Design Project Manager, Denver Water

Fremont Water Pollution Control Center


This $63.5 million CMAR project included upgrading and expanding the existing wastewater collection system, which was originally built in 1949. The system is a combined sewer overflow that conveys dry weather flow to the wastewater plant at approximately 6 million gallons per day (mgd). The reason for the renovation is to increase the capacity of the Wastewater Treatment Facility from 10 million gallons per day up to 24 million gallons per day.

  • Saved the client $6 million through value engineering.
  • Doubled the city’s capacity in rain events to meet the Clean Water Act.
  • Largest project in city’s history.
  • One of the first projects of its kind where a general law city, such as Fremont, utilized the CMAR project management method pursuant to a recent change in Ohio law.

Project Impact

  • Used local businesses.
  • Enhanced environmental protection and the health and well-being of all residents in the region.
  • Reduced the amount of raw sewage and storm water that flows into the Sandusky River.

The Dannon Company Wastewater Pretreatment System


To keep pace with product demand, Dannon significantly expanded the capacity of their West Jordan, UT yogurt processing facility from 145 to 242 tons annually, with expansion up to 500 tons. MWH Constructors was contracted to design and build the wastewater pre-treatment plant in just six short months. The facility was needed to support the increased yogurt production and treat the wastewater created during the manufacturing process. The pre-treatment process design exceeded all performance criteria, established odor control in the surrounding area, and complied with environmental requirements for discharge to the South Valley Publicly-Owned Treatment Works.

  • Substantial completion was achieved in March 2011 after just 110 days of work.
  • Enabled a long-term plant expansion for Dannon.
  • MWH Constructors was awarded the Design-Build Institute of America (DBIA) Rocky Mountain Region’s 2011 Design-Build Award for this project. MWHC was honored in the Industrial/Process/Research Facilities category.

Project Impact

  • The Dannon operation purchases a high percentage of dairy produced throughout the intermountain Utah region, thus benefiting regional dairy interests from this plant expansion.
  • The expansion enables Dannon to meet the supply needs for customers.
  • Creates jobs for the local community.

Lick Run Greenway


MWH Constructors is providing construction management services for the Lick Run Greenway project, which will help keep stormwater out of the Metropolitan Sewer District’s (MSD’s) combined sewer system and reduce combined sewer overflows (CSOs) into the Mill Creek. The project includes a variety of gray and green infrastructure projects across the watershed, including new storm sewers, bioswales, stream restoration, stormwater detention basins and bio-infiltration gardens.

  • When completed, the project will eliminate nearly 400 million gallons of Combined Sewer Overflow and ensure that 88% of the flows during a typical year of rain will either reach the Mill Creek Treatment plant or be discharged as stormwater to the Mill Creek.
  • The Greenway also includes the creation of a mile-long bio-engineered creek in a park-like setting, which will wind through the valley corridor and mimic a natural stream.

Project Impact

  • This project will improve water quality, create new jobs, and provide opportunities for neighborhood revitalization.

Clay Mills Sewage Treatment Works


Clay Mills is a large filter works serving a domestic population of around 100,000 in Burton-on-Trent, Staffordshire UK. MWH Constructors was responsible for the design and construction of a new activated sludge plant at Clay Mills. The principal driver for the project scope was phosphorus removal, although sludge treatment was also improved. This was a $5.3 million Design-Build project.

  • The project successfully recycled 100% of waste produced, as well as reducing their CO2 emissions by 25%.
  • Saved over $450,000 dollars.
  • UK’s Environmental Agency regulations stipulate the removal of 80% of phosphorus from waste, in order to improve digestion, increase green energy generated from biogas, as well as to adhere to regulations. The plant upgrade also included a new sludge thickening works, an acid phase digester and CHP (Combined Heat and Power).
  • Won three Silver awards at the National Considerate Constructors Scheme Awards.
  • MWH Constructors was awarded the Gold Considerate Constructors Award in 2015.

Project Impact

  • A more effective treatment process has been adopted to minimize the odor from the new Bio-P (phosphorous recovery) activated sludge plant.
  • The team has closely cooperated with local farmers to install land drains and repair sludge pipes to prevent flooding.
  • The project was further involved in modifying the Environmental Agency Flood Barrier and carrying out a high voltage power upgrade to the works, while working near a busy railway crossing and close to local residents, businesses and farmers.
  • The team constantly worked to help local charities, the Parish Council and farmers, as well as provided school talks and assisted in the preservation of the Victorian Pumping Station. Such engagement with the community, as well as regular communication with residents, has ensured excellent community relations.
  • The Clay Mills project, which was located on the River Trent flood plain has been especially considerate towards wildlife in the surrounding environment, by relocating a badger sett and retaining a storage lagoon, to provide a haven for wild birds and newts.

Sellwood Bridge Project


In a joint venture with Sundt Construction, Inc., Slayden was contracted to replace the original, deteriorating structure with a wider, pedestrian-friendly bridge that could accommodate the area’s growing traffic volume. The project team utilized a bold approach to construct the new bridge without shutting down traffic flow. The approach involved lifting the old bridge deck and truss with hydraulic jacks and moving it to one side, then placing it on a set of temporary piers and connecting it to temporary approach spans so that traffic could continue to use it while the new bridge was constructed. The 1,100-foot-long steel bridge truss was moved in a single 12-hour operation and became one of the longest bridge sections ever to be moved.

  • The new bridge complements the immediate surroundings and features two vehicle lanes in each direction, has two six-foot-wide bike lanes, and two 12-foot-wide sidewalks.
  • The 2,000-foot-long bridge, originally built in 1925, is the community’s only crossing over the Willamette River for many miles in each direction, making it the state’s busiest two-lane bridge as well as an iconic piece of architecture.
  • Named “2017 Project of the Year” and “1st Place Transportation Project” by the Daily Journal of Commerce at the annual Top Projects competition.
  • The Sellwood Bridge is the first registered project in Oregon to pursue Greenroads certification. Greenroads is an independent certification process for sustainable transportation projects similar to the LEED program for buildings.

Project Impact

  • The new Sellwood Bridge was designed to the latest seismic standards and construction engineering which address both 500 and 1,000-year recurrence period earthquakes.
  • Arched form fits the natural setting and is appropriate to neighborhood scale.
  • Sustainable – components are made of recycled steel.
  • Increased safety and traffic performance.

Cape Coral Facilities/Utilities Expansion Program


MWH Constructors was the designer and CMAR for this $872 million Utilities Expansion Program and Facilities Expansion Program for the City of Cape Coral, led by Project Manager Larry Laws. This program included over 700 miles of pipelines and 34 pump stations over seven large project areas. The entire program was completed on time and under the City’s budget.

  • Nearly 80 separate projects totaling $873 million had to be coordinated to extend existing water, wastewater and irrigation services to nearly 20 square miles of residential areas while simultaneously expanding the existing treatment plant capacities to keep pace with the City’s explosive growth.
  • MWH Constructors created a “Customer First” program that was successful in keeping residents informed about the project which resulted in resulted in reduction in calls about the project.
  • MWH Constructors achieved 3.3 million hours with only one lost time incident and delivered the program ahead of schedule.
  • Saved $12 million.

Project Impact

“Customer First Program” included:

  • Neighborhood ‘street’ meetings to provide a forum for discussing issues particular to the affected areas.
  • Public information meetings for the public.
  • Distribution of factsheets, which offer more detailed information about the program.
  • Door hangers to notify residents of specific construction activities and schedules.
  • 24-hour/7-days-a-week hotline available for citizens to call with questions or concerns (averaged 300 calls/ month).
  • A website to provide information on the program and deliver construction status updates as the program progressed (averaged 2,000 hits/month).
  • Follow-up to customer concerns and requests.
  • Outreach to numerous committees and agencies.

Clark County Dual Media Filters Upgrade and Expansion


MWH Constructors, in joint venture with Tiberti Construction, delivered this $94 million CMAR expansion project, which was the first CMAR project for the Clark County Water Reclamation District. It is a 40 mgd brownfield wastewater treatment upgrade and refurbishment comprising a new filter inlet pump station, 16 new filters and associated chemical treatment facility, filter backwash system refurbishment (civil and mechanical), expansion of the existing UV disinfection capacity, new equalization basin and demolition of redundant facilities. MWH Constructors self-performed approximately 40% of the work.

  • $2M in savings to the client.
  • County serves more than 248,000 business and residential accounts.
  • New facility will have a capacity of over 100 million gallons of wastewater.
  • Through the collaborative CMAR process, NWS was able to conduct interactive five dimensional (5D) design an constructability review at 60 percent design development.

Project Impact

  • The project helped create jobs while both firms applied their expertise in the industrial water/wastewater process improvements by investing in the community’s infrastructure. The Clark County Wastewater Reclamation District Treatment Center is the largest wastewater agency in the State of Nevada, serving more than 248,000 business and residential accounts. The District’s collection (network of pipes and pumps) system totals more than 2,000 miles of pipeline and 27 pumping stations to deliver the wastewater from the homes and business to one of the seven treatment facilities.

Austin Water Treatment Plant No. 4


The City of Austin required a new water treatment plant and pump station to respond to its rapidly growing population and selected MWH Constructors to complete the $379 million project. Plans included the construction of a marine raw water intake, tunnels, a pump station, conveyance systems, and water treatment facilities with an initial 50-mgd capacity. The new treatment plant takes raw water from nearby Lake Travis and connects to a pump station via a 9-ft finished diameter tunnel.

  • 2.6 million man hours and only one lost work day injury.
  • Completed project on time and $2 million under budget.
  • Attained LEED Silver rating.
  • Recycled all harvested native vegetation for mulch throughout the site and re-purposed all suitable. excavated materials. Over 200 truckloads of excavated rock were utilized on other City projects.
  • Recommended more than $75 million in cost reductions, of which $30 million were accepted.

Project Impact

  • A local land owner voiced concerns about the building not fitting in within his housing development. The team heard his concerns and, as a result, MWH Constructors added rock face exterior walls with false windows and balconies into the design and construction. This Spanish/Italian design flair helped the pump station blend more smoothly into the surrounding community.
  • MWH Constructors partnered with many local subcontractors, involving 33% of minority and women-owned businesses. We awarded more than 200 separate contracts totaling more than $50 million to local minority and women-owned businesses during the life of the project. MWH Constructors maintained a robust community relations program to keep affected stakeholders informed.

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