Safeway and King Soopers say they've given union workers their last, best, final contract offer.
Workers represented by United Food and Commercial Workers Local 7 were scheduled to start voting on the offer Wednesday and wrap up Friday.
Neither the union nor the store has commented on terms of the deal.
Contract talks have been going on since April. While Safeway workers have voted to authorize a strike, the union's international president has held off on sanctioning that. Joe Hansen instead said he would urge the stores to submit a final offer.
Local president Ernest Duran Jr. has said the threat of a strike before the busy holiday season could help both sides reach a deal.
King Soopers is a unit of Kroger Co.