IOWA CITY, Iowa (AP) — Roberts Dairy says it’s closing its plant in Iowa City immediately and moving operations to Dubuque and Omaha, Neb.

The Iowa City Press-Citizen says the company sent a letter to the mayor, saying the closure is effective Friday. Forty-seven workers will be affected. Roberts Dairy will continue to employ 30 workers as drivers and support personnel. In the letter, the company says the closure is the result of lower volumes and the need to consolidate operations.

The dairy says it will continue to have 250 employees in Iowa.