Perini Building Company Delivers CityCenter One of the World’s Largest Environmentally Sustainable Developments

  • CityCenter
  • 01.07.10
Perini Building Company constructed CityCenter, one of the world's largest environmentally sustainable developments.

The U.S. Green Building Council has awarded the 67-acre urban development with six LEED Gold certificates.  LEED certified projects are ARIA Resort & Casino; Vdara Hotel & Spa; Mandarin Oriental, Las Vegas; Veer Towers; and Crystals retail and entertainment district.  CityCenter marks the highest LEED achievement of any hotel, retail district or residential development in Las Vegas.

To achieve MGM MIRAGE's vision of creating a sustainable environment, Cindy Ortega, MGM MIRAGE's senior vice president of Energy and Environmental Services lead a collaborative effort, including Perini, the entire design team, subcontractors, consultants, and hundreds of material manufacturers and suppliers.

As the general contractor on CityCenter, Perini’s impact on earning LEED credits was substantial.  During the preconstruction phase, Perini gathered data, provided client feedback and suggested options for pursuing the most important material-based credits in cost effective ways.  Perini’s preconstruction and LEED teams collaborated to model costs for building components, site-based management plans and building systems relative to Forest Stewardship Council certified wood, construction waste management and indoor air quality management throughout construction.

Perini developed and maintained systems for tracking and documenting construction LEED credits on the 18-million-square-foot project.  Working closely with vendors and suppliers, Perini managed LEED compliance for over $1 billion dollars worth of building materials. 

Perini offered formal training sessions for its own staff and 250 subcontractors, assisting with research and procurement of sustainable materials and implementing proper LEED documentation.

Many of the environmentally sustainable design and construction techniques implemented at CityCenter had never been approached on such a major scale.  For example, the ARIA Resort’s casino presented one of the most challenging efforts on the project.  The airflow in the casino streams from under the floor through slot machine bases, resulting in fresh air delivered directly to the guest, better indoor-air quality and a more comfortable environment.  Traditional casino airflow is from the ceiling downward.  The new design required over a thousand floor penetrations and complex ductwork.

Building a project of this scale has benefits that extend far beyond CityCenter.  Building to LEED standards supported the local economy by procuring over 48 percent of the LEED tracked materials from within 500 miles of the project.  Over 18 percent of this material was harvested, extracted or recovered within the same 500-mile radius.  Material suppliers and manufacturers that worked or bid on CityCenter were required to document the origins and composition of their products gaining experience in sustainable practices transferable to future projects.  The magnitude of CityCenter has assisted an emerging waste management trend in the Las Vegas area, influenced market attitudes and is viewed as a model for sustainable design and construction.

“MGM MIRAGE’s initiative to build such an unprecedented environmentally sustainable project has changed the Las Vegas construction and the hospitality industry.  There is a new level of understanding of the importance of environmentally responsible construction.  The commitment of all of the entities involved to achieve LEED at this level has been one of the most rewarding aspects of this monumental project,” said Craig Shaw, president and chief executive officer of Perini Building Company.

Perini’s areas of impact on LEED certification:

Construction Waste Management -
• Hauled in excess of 295,000 tons of waste from the site of which more than 276,000 tons was diverted from land fill; 93 percent overall diversion.  
• Recycling or reuse of more than 80 percent of imploded Boardwalk Hotel and Casino, including doors, hardware, scrap steel, other metals and carpet were sold to resellers; broken tiles, concrete and asphalt were taken offsite, crushed and made ready for reuse as backfill or underlayment. Salvaged toilets and countertops were donated for reuse. 
• Donated 82 tons of used wood to the local Carpenters Apprenticeship training center.

Recycled Content -
• Used fly ash as cement replacement in over 1 million cy; averaged 4 percent of mixes by weight.  Fly ash, a bi-product of coal burning, is a fine, glass-like powder comprised of the non-combustible mineral portion of coal.
• Achieved a 26 percent recycled content for all applicable construction materials.

Regional Materials - Manufactured and Extracted Regionally -
• Procured over 48 percent of the applicable construction materials from manufacturers within a 500 mile radius.
• Majority of structural and reinforcing steel manufactured within 500 miles of job.
• The concrete was manufactured in a temporary batch plant adjacent to the CityCenter jobsite and all the raw materials were extracted from within 500 miles.
• Majority of drywall sourced within 500 miles of job. 
• Majority of millwork/cabinetry manufactured within 500 miles of job. 

FSC Certified Wood -
• Worked with subcontractors to ensure a minimum of 50 percent of wood was certified in accordance with Forest Stewardship Council (FSC) guidelines and carried a chain-of-custody.
• Researched wood materials to ensure products met FSC requirements.
• Contracted distributors and manufacturers bearing FSC chain-of-custody certification.
• Performed sensitivity analyses during procurement to identify wood materials to be sourced FSC.
• Assisted subcontractors to become FSC certified in order to provide materials to CityCenter.

CityCenter created a market for Forest Stewardship Council (FSC) certified wood use in Las Vegas.  Perini and its subcontractors procured more than 91 percent of the total wood for the ARIA Resort & Casino and Crystals through/from FSC chain-of-custody certified suppliers and manufacturers.  FSC wood products came from more than 85 FSC certified mills, material vendors, suppliers, distributors, manufacturers and fabricators.

Construction Indoor Air Quality Management (IAQ) Plan during construction -
• Developed, implemented, maintained and monitored an Indoor Air Quality Management Plan during construction to prevent indoor air quality problems in the future and protect the workers during construction.
• Educated subcontractors of all trades what is required for plan compliance.
• Performed weekly site inspections to ensure field compliance with the plan.

Low-Emitting Materials -
• All of the paint, adhesives, and sealants used throughout the 18-million-square-foot project met the LEED referenced standards.
• Procured/installed low-emitting Carpet and Rug Institute Green Label Certified carpet pad.
• All composite wood (plywood, MDF, particleboard) is free of added urea-formaldehyde.

Construction Pollution Prevention -
• Implemented and maintained a Storm Water Pollution Prevention Plan and Dust Control Plan to mitigate and manage the disturbed site during construction.
• Reclaimed water from Monte Carlo’s cooling tower was used to control dust during CityCenter construction, saving 2.4 million gallons of potable water and the energy required to process and pump it.
• Used soil surfactant and tackifier to lessen the occurrence of stockpiled and unimproved surface dirt becoming airborne.

Biodiesel -
• Perini subcontractor used a B20 blend of biodiesel in their equipment for site work and excavation.
• Perini tracked and reported totals of biodiesel used, which resulted in the award of a LEED Innovation Credit for reducing carbon emissions and utilizing local yellow food grease which is otherwise sent to a landfill.

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