(April 30, 3:16 p.m.) Two of the three packinghouses owned and operated by Evans Fruit Co. Inc., Cowiche, Wash., are shipping apples as usual after an arson fire resulted in substantial damage to the company’s third packinghouse in Tieton, about 15 miles west of Yakima, Wash.

“We lost a loading dock, a controlled-atmosphere room and maybe all of our computer-controlled packing lines,” said a company spokeswoman who requested her name not be revealed. “But we’ll be back in business in about three weeks.”

Fire department officials estimate the loss at $5 million. A portion of the facility’s roof caved as a result of the fire.

Keith Matthews, executive director of the Yakima Valley Growers-Shippers Association, Yakima, said there should be no delays in deliveries to retail and foodservice customers, because the other two packinghouses could pick up any slack caused by the fire.

Fire department investigators said the blaze, which broke out in the early morning hours of April 24, was set. The department has offered a $10,000 reward for information leading to the arrest and conviction of the person or persons responsible, the company spokeswoman said. A neighbor, who alerted the fire department, reported seeing two men running from the scene.

More than 100 firefighters worked the blaze for four hours. A fire department official said cardboard cartons stored in the packinghouse helped the fire spread quickly.

Evans Fruit is among Washington’s largest apple grower-shippers with nearly 7,000 acres of apple orchards.