An Alexandria firm was the apparent low bidder for construction of the King Street Metro station, according to the Washington Metropolitan Area Transit Authority.

The firm, A.A. Beiro Construction Co., at 3013 Colvin St., submitted an $8,159,137 bid for the project. The Washington Metropolitan Area Transit Authority estimate was $8,908,220.

The King Street station is one of three Metro stations planned in the city of Alexandria. At the request of the city government, the King Street station will reflect the colonial nature of Old Town. The canopy over the train platform will be a peaked metal roof with a skylight down the center instead of the conventional concrete gull-wing. The mezzanine below the elevated platform will have brick finishes on two of its four walls; brick sidewalks will lead to and from the entrance; and two special decorative lamps will be installed.

The station will be parallel to the RF&P Railroad tracks between Diagonal Road and Commonwealth Avenue. The entrance will be off King Street next to the railroad underpass. Provision for a future connection between Metro and Alexandria Union Station, for a possible commuter rail transfer, will be made. Room for bus bays and space for motorists to drop off Metro passengers also will be provided.

The transit authority estimates that 42,600 passengers will use the station daily in 1990. King Street station, along with the entire Huntington Line through Alexandria, is scheduled to open in late 1980.