Locked-out FortisBC workers picket during August outside the company's property on Enterprise Way in Kelowna.
The proposed deal was voted down by the 240 employees represented by the International Brotherhood of Electrical Workers Local 213.
"We hadn't recommended our members either support or reject the agreement," union spokesman Rod Russell said Friday.
"We just put the mediator's recommendations in front of them for them to judge, and it was rejected by a substantial number," said Russell, who declined to release the actual vote result.
A spokeswoman for FortisBC said the company was disappointed the recommendations of mediator Vince Ready were not accepted by the unionized employees.
"FortisBC accepted Mr. Ready's recommendations, and we believed there was an opportunity to end the labour dispute," said Joyce Wagenaar, director of communications for FortisBC.
"We are continuing to keep our focus on serving our customers and remain committed to reaching an agreement," she said.
The mediator is no longer involved in trying to resolve the dispute, and no direct talks are planned between the company and the IBEW.
The coming winter, with the prospect of snowstorms that could knock out power, might put some pressure on the company to resume talks, Russell suggests.
"It's a crummy thing to kind of depend on the weather, but the reality is we're better at putting the lights on than they are," Russell said, referring to the company's ability under essential service staffing levels to respond to outages.
FortisBC locked out the IBEW workers in June. Key issues in the dispute involve wages, terms of employment and what Russell calls the company's demand for "unacceptable concessions" from the unionized employees.
FortisBC workers are locked out in Kelowna, Penticton, Oliver, Trail and Rossland. They are meter readers, substation operators, electricians, power line technicians, mechanics and millwrights.
Another 60 FortisBC employees, represented by the Canadian Office and Professional Employees Union, are also off the job because they are refusing to cross the IBEW picket lines. Both the IBEW and COPE workers are getting partial pay from their respective unions.