The Old Mill in Bend. Here is the history of the iconic smokestacks you see: The first two smokestacks were erected in 1922 and stand 206 feet tall from ground level. The third south stack was added in 1933 and is 201 feet tall. Housed atop Brooks-Scanlon's Mill B powerhouse building, the space currently is the the home of REI. To me, they simply signify a part of Bend that is easily visible throughout the town.