The Trojan No. 2 fire that burned more than 2,900 acres on Maple Mountain is fully contained and should be extinguished by Saturday.
Only 30 of the 412 firefighters from Utah, Nevada, California, Alaska and Wyoming that fought the blaze remained on the mountain Friday morning. Two helicopters remained on standby at the Springville/Spanish Fork Airport.Fire information officer Bill Roach said the remaining firefighters are extinguishing hot spots under conifer stands and near unburned sections of oak brush.
Firefighters also are spreading 500 pounds of grass seed on fire lines in hopes of preventing erosion next spring. Once funding is available the interior portions of the burned area will be seeded from the air.
Currently the cost of fighting the fire is at $850,000. When all firefighters are pulled off the mountain, Roach said the costs likely will exceed $900,000.
Fire investigators have determined that the fire began inside the Trojan Corp. explosives manufacturing plant near the mouth of Spanish Fork Canyon Saturday just before 5 p.m. Spanish Fork Police Chief Dee Rosenbaum said investigators have eliminated several possible causes but have not eliminated electrical, ammunition or intentional or accidental human causes. Rosenbaum said a cause likely will be determined by early next week.
Rosenbaum also said Spanish Fork and Mapleton public safety officials will meet with Trojan Corp. officials Monday to discuss concerns raised by some Mapleton residents over the plant's safety.