The original portion of this mill was built in 1794. In 2002, Mr. John Cugle of Westminster Land Resources, L.L.C., a developer of Roop's Mill property, presented the County Commision with a site plan for Roop's Mill. His plan expressed a desire to restore the mill and the pedestrian suspension bridge between the mill and the miller's house, formerly Brookside Place, now known as Roop's Mill Inn Bed & Breakfast. Further plans called for a restaurant, conference center, bed & breakfast, & catering facilities on the site, while preserving the major historical structures. It's not certain if this plan is still on the horizon. A pier of the foot suspension bridge can be seen to the right of the mill above and beyond the roadway pavement.

A 6'wooden waterwheel was driven by the power of a 21' drop in elevation from the beginning of the millrace from the creek to where it supplied the wheel with waterpower. This water supply was lost in the reconstruction of Old Taneytown Road/Sh 832.

This old stone house is across Old Taneytown Road/Sh 832 from the mill, but was not the miller's house. The miller's house is the next house further away from the mill toward Westminster, but on the same side of Sh 140. This is the now named Roop's Mill Inn.

From 1815-1870, the mill served as a grist, saw, & cider mill (this usually meant a distillery for making "hardcider"). There was an up-and-down saw mill still in the rear portion of the mill as late as 1953. The derelict suspension bridge (see website) is actually four spans utilizing three piers/towers. Only one section, that at the Roop Mill Inn has been repaired for service.

The mill has been idle for six decades, having been owned and operated through the 1940's by the Roop family. Much of the wooden equipment remains within the mill structure. It was one in the mills visited in September 2005, during the Mason-Dixon Spoom Conference. GPS: 39° 35.39'N, 77° 01.89'W 640' elevation