The National Labor Relations Board says the outcome of last week's vote to organize Overnite Transportation Co.'s Tonawanda center is unsettled.
Local 375 of the International Brotherhood of Teamsters declares that it won enough votes to represent truckers at the facility.
But four votes are being challenged and they could change the outcome.
"It's still up in the air," said Charles Donner, assistant to the regional director of the NLRB.
The board said the union's petition to represent truckers of the center drew 16 affirmative votes and 14 negative votes. Another four votes were challenged in the Oct. 10 balloting.
The challenges date to September when the board's regional director ruled that mechanics and drivers should both be allowed to vote. The union asked for a review of that decision which led to the board reversing the ruling to exclude three mechanics from the proposed bargaining unit.
Overnite asked for a reconsideration of that reversal and a decision is pending, Donner said.
The union challenged one ballot, asserting it belonged to a supervisor not entitled to vote.
Brian Masterson, president of the Teamsters local, said the victory is important because of the hard work put into organizing the site and because it is one of many Overnite sites nationwide that the union seeks to organize.