Started planning back in 1854. Elevation of 160’ would supply seven-eighths of population (according to contour lines). Supplying others outside that elevation would be a matter of mechanical detail (pumping stations). The need to keep Lake Roland and the Gunpowder as two distinct and separate supplies, as Lake Roland becomes muddied during rainy season (this was why Druid Lake was constructed). It was first suggested to tap the river as far up as the Warren Factory but concurred by a host of engineers that the proper volume of water could not be obtained by damming at any point above Raven’s Rock and most agreed to a point further downstream about where Mr. Martin has located it. The dam will be erected on the Gunpowder river, at a point admirably adapted for the purpose, a short distance above Mine Bank Run, and the lake thus formed, will extend up the river as far as Meredith’s Ford Bridge at the Dulaney Valley Turnpike, where the pump house connected with the ‘Temporary Supply’ is now located…will flow by natural gravity through a twelve foot pipe to a lake at Montebello, between Hillen and Harford roads, located in a natural basin formed by one of the tributaries of Herring Run (Tiffany Run). The lake will have a water area of about eighty acres and a storage capacity of 700,000,000 gallons. The twelve foot pipe (conduit) will continue to a point on the Harford road opposite Homestead, whence pipes will be laid to connect with the city pipe system at North Boundary Ave. and Washington St. Lake Clifton.
This photo has me baffled. It is showing two 12′ conduits, whereas all the drawings only show one. On the left you can see where the laborers are building the brick lined conduit. On the right, nothing going on. Wondering if it was built in error or was it for a bypass as the dam was being built?
City workers lounging and the job is almost completed.