Investigators determined that the fire began on a small private parcel at the end of Lehi Road, west of the Lockheed-Martin facilities, in an area known as Scott Creek Drainage.
The Lockheed Fire began Aug. 12 and was contained Aug. 23 after charring more than 7,800 acres, destroying 13 outbuildings and forcing 2,400 people to be evacuated from their homes.
The cost of the fire is estimated at $26.6 million.
