OES 4606 is a 2021 Ford F550 Super Duty that is powered by a 6.7L Powerstroke Diesel engine.  It has an HME Ahrens-Fox 500 GPM Midship Darley JMP 500 two-stage pump and carries 280 gallons of water with 20 gallons of foam.  Although it is equipped with 4 wheel drive and is designed to fight wildland fires that are out of reach of normal fire apparatus, it also carries a complement of auto extrication and medical equipment.

OES apparatus are supplied by the California Office of Emergency Services and are maintained by the fire district.