Pimlico will open Monday after progress in contract negotiations between the managements of Pimlico and Laurel race tracks and the representatives of Local 27 of the United Food Commercial Workers union today apparently averted a threatened strike.

At 8 p.m., union attorney Abbato and Laurel representative Martin Jacobs jointly announced, "We are making progress and Pimlico will definitely run tomorrow."

Monday is the first day of Pimlico's 49-day summer meeting.

Both sides appeared optimistic that the issues could be resolved.Management has scheduled a meeting Monday afternoon and is scheduled to meet with the union representatives at night.

The talks appeared at an impasse earlier this week, but sources said management contacted the union and negotiations resumed Thursday. None of the negotiators would comment on details, but sources say the main issue is the desire of track management to have more latitude in making work assignments.

The union represents mutuel clerks, parking lot attendants, the starting gate crew, admissions employes and jockey room valets.

Management has proposed cutbacks in union membership, dropping the starting gate crew, guards and valets from the rolls.

The union is asking for a 10 percent increase in wages in the first year of a proposed two-year contract and a 15 percent increase in the second.

Pimlico's opening-day feature will be the $40,000-added Wistful Handicap for fillies on the turf. It is scheduled to be run in two divisions. Post time on the first race is 1 p.m.