The Grass Valley Air Attack Base was established in 1958 and is located at the Nevada County Airpark in the CDF Nevada-Yuba-Placer Unit.
Grass Valley responds to an average of 450 calls per year. Staff at Grass Valley consists of one battalion chief, two fire captains, one fire apparatus engineer, and six firefighters. The complement of aircraft located at Grass Valley includes one OV-10 Bronco and two S-2T airtankers.
On average, the base pumps about 500,000 gallons of retardant a year. With the base’s pumps, loading pits and equipment, Grass Valley has a possible peak output of 120,000 gallons of retardant each day.
The base’s immediate response area spans to the Nevada stateline to the east, Butte and Plumas counties to the north and Amador County to the south.