An 845,000 square foot UPS warehouse on the Grafton/Shrewsbury line is set to become a reality now that both towns have given the project the thumbs-up.

Prologis, Inc. of California is the developer of the 212 acre lot at 50 Centennial Drive. Most of the project will be located in Grafton, with the warehouse itself about 70 percent in that municipality with the rest in Shrewsbury. The warehouse will sit behind the Massachusetts Bay Transportation Authority commuter rail stop in Grafton.

UPS representatives expect to open the warehouse in 2027. With its 282 loading docks, traffic has been a concern throughout the hearing process.  Prologis, Inc. has proposed paying to improve the Route 20 and Centech Boulevard intersection.

The warehouse will also have 757 exterior trailer parking stalls and 830 car-parking stalls for employees. It is expected to handle more than 50,000 packages per hour.

Plans show the warehouse generating 5000 vehicle trips in every 24 hours, combining the figures from 3600 employee trips, 500 from single-unit trucks, and 900 from articulated trucks.