Acme Concrete Paving Inc., of Spokane, has submitted a low bid of $30.7 million for a 19-month Spokane International Airport project to repave SIA's main runway and its two supporting taxiways, and to extend them by 2,000 feet.

SIA had estimated the work would cost about $45.2 million.

In addition to extending the airport's main runway and the two parallel taxiways on either side, the work will include correcting the gradient of the runway and repaving another 7,000 feet of the current 9,000-foot runway, says SIA spokesman Todd Woodard.

It also will include installation and upgrades of associated navigation, electrical, lighting, signage, controls, and monitoring systems.

The work is to begin around April 20 and to be completed by November 2010, Woodard says. During the repaving work, air traffic will be shifted to the airport's alternate runway, which is 8,100 feet long, he says.

Some of the project will be paid for with $7 million in federal stimulus funding. SIA is paying for the rest of the project primarily with money it has banked from passenger usage fees it collects.

Recently, Wm. Winkler Co., of Spokane, won a $7.7 million contract for repaving portions of the airport's terminal parking apron.