Grist mill became an electric power plant on the Tiber

Just off lower Main Street on Tiber Alley, a grist mill was built sometime before an 1860 map labeled it "T McCrea Depot Mill." The 1894 Sanborn map labeled it "Ellicott City Electric Light & Power Co." (black on pink rectangle behind Kraft Meat) with the "Engines & Dynamos".  The electric company was started in 1892 but was in financial troubles by 1894 and in 1898 EC went with a Catonsville company.   Click images to enlarge.

Electric trolley to Ellicott City for Christmas shopping

"Line will be in operation in time for Christmas Shopping" was the headline for an 1898 article in the Baltimore Sun.  Initially started in 1895 by the Edmondson Avenue, Catonsville Ellicott City Electric Railway, they stopped constructing the road which involved cutting through a 50-foot hill and diverting a stream. The new company had problems building the eastern bridge abutment and had to get permission to shut down the mill race for the Gambrills mill while they built the abutment.

Bloede Dam - Power plant inside a dam

The first hydroelectric plant within a dam was built just south of Ilchester and Ellicott City on the Patapsco River in 1907. The underwater plant had windows behind the falls for light, but during rain when the "water is muddy" less light entered the room.

The dam was removed in 2018.

Edith Clarke - first female electrical engineer

Edith Clarke (1883-1959), a gifted mathematician, was raised in the John R. Clarke home “Arlington”.  She attended numerous colleges including Vassar (1908) and MIT (1919) and had a variety of jobs with the longest at General Electric 1919-1945. Her abilities were finally recognized and she was advanced to an engineer – a job previously closed to women. She invented the Clarke calculator, patented in 1921. After retiring, she taught for ten years at the University of Texas in Austin, then returned to Maryland.