Express Scripts Inc. told employees this morning that it will close its Street Road facility in Bensalem on Feb. 1.

The St. Louis mail-order pharmacy employs about 535 workers at Street Road. It had already decided to close its Marshall Lane plant in Bensalem, with 365 workers, on Dec. 16.

After making many concessions, the pharmacist, warehouse workers and customer service employees, represented by Service Employees International Union Healthcare Pennsylvania, had voted overwhelmingly on Nov. 23 and 24 to reject Express Scripts' final offer - an offer the company said was key to keeping the Street Road plant open.

Meanwhile, the workers have been contacting the company's customers in person or by mail, saying that new facilities built in St. Louis would not be able to handle either the current flow of orders or increased demand as the company has landed major contracts. The union has also enlisted the help of the region's local, state and national politicians to keep the plants open.

Other than a small plant in Albuquerque, the Bensalem facilities are the only ones that are represented by a union.

Express Scripts reported $24.7 billion in revenues and $827.6 million in profit in 2009.

Company shares picked up $2.30 (4.42 percent) this morning in Nasdaq trading, and were priced at $54.39.

Contact staff writer Jane M. Von Bergen at 215-854-2769 or jvonbergen@phillynews.com.