Blue Valley Creamery Company was a company that operated many creameries

Creamery

In a dairy, the creamery is the location of cream processing. Cream is separated from whole milk; pasteurization is done to the skimmed milk and cream separately. Whole milk for sale has had some cream returned to the skimmed milk....

 and milk plants across the United States.
Before 1900, limitations in transportation and storage limited the geographic scope of creameries. To that time, creameries were primarily local, gathering cream from nearby dairy farms and distributed the produce locally. Also, cream separation was inefficient, primarily relying on gravity or centrifugal force.