Project Description

The Bus Maintenance & Operations Facility was designed to optimize Los Angeles County Metro’s bus transit service throughout the Central Los Angeles region.

The new sustainable facility accommodates a fleet of 200 CNG (compressed natural gas) buses. The project entailed construction of a cast-in-place concrete parking structure housing the Metro buses with an attached two-level, 21,000-square-foot transportation building on the structure’s northwest corner. The project also required tying into an existing two-level maintenance building.

Athena Engineering won the bid with McCarthy Building Companies, Inc. as the Mechanical HVAC & Building Automation subcontractor. The systems that were constructed through-out the facility include:

  • Installation of high efficiency condensing hot water boilers with 30:1 turn down (Broken down to smaller systems for staging)
  • (2) 300-Ton centrifugal chillers and (14) high Efficiency custom-built air handling units
  • CHW and HW Piping Distribution with VSD pumps
  • Return and supply duct distribution, duct sound attenuators, and CHW/HW/Duct Insulation
  • Maintenance Bay Ventilation systems,
  • Big Ass Fans
  • Variable Air Volume system
  • Raised Floor Underfloor Pressurization
  • Humidity control based upon Enthalpy
  • Natural Gas Monitoring, carbon monoxide monitoring, and exhaust systems with Variable Speed evacuation systems
  • Building Pressurization control
  • Full Direct Digital control System with associated Energy Management functions integrated
  • Humidity Control
  • Demand ventilation
  • Indoor/Outdoor Air Quality monitoring and control
  • System Commissioning & Final Air Balance

Designed to meet LEED Gold certification standards from the United States Green Building Council, sustainable construction methods were used throughout construction such as maintaining proper indoor air quality; utilizing local labor and materials and recycling construction waste.

Photo Credit: McCarthy Construction & Metro

General Contractor: McCarthy Construction

Download Project Fact Sheet (courtesy of Metro)