Off-Road Equipment

Reducing Pollution From Off-Road Engines

Nearly 40% of the diesel exhaust in the Puget Sound region comes from off-road engines, which includes construction, aircraft support, and cargo-handling equipment* used at seaports and rail yards.Graph of Different Diesel Exhaust SourcesWe help companies reduce diesel emissions from off-road engines through:

  • Cleaner fuels
  • Engine replacements
  • Retrofit technologies (exhaust and idle-reduction)

*Note: For emissions inventory purposes, our agency includes cargo-handling equipment in the maritime sector and not in the off-road sector.


Cargo-Handling Equipment Idle-Reduction Retrofits

  • Description: Retrofit cargo-handling equipment with idle-reduction technology at the ports of Tacoma and Seattle
  • Clean Air Strategies: Preheaters that warm up the engine and engine fluids instead of running the equipment's main engines
  • Air Pollution Reductions: To be determined based on program participation
  • Project Period: In progress
  • Funding:
    • Up to $515,000 - Washington Department of Ecology
    • Up to $100,000 - Port of Seattle
  • Project Manager: Beth Carper

Cargo-Handling Retrofits & Replacements

  • Description: Retrofitted 100 and replaced 10 cargo-handling equipment at the ports of Tacoma and Seattle
  • Clean Air Strategies: Diesel oxidation catalysts, diesel particulate filters, and new vehicles
  • Air Pollution Reductions: 
    • PM2.5: 7 tons per year
    • NOx: 28 tons per year 
  • Project Period: January 2009 through May 2012
  • Funding:
    • $850,000 - Environmental Protection Agency
    • $100,000 - Port of Seattle
    • $100,000 - Port of Tacoma
    • $198,500 - PS Clean Air Agency
  • Project Manager: Beth Carper