Oct. 31, 1877. View of connection of Sudbury River pipeline with 48" outer pipe at effluent gate house, of Chestnut Hill Reservoir, looking west.

Oct. 31, 1877. View of gates on Sudbury River pipeline below effluent gate house, Chestnut Hill Reservoir, looking south.

View of gates on Sudbury River pipeline below effluent gate house, Chestnut Hill Reservoir, looking south. Oct. 31, 1877.

Connection of the Sudbury River pipeline with 48" outer pipe at effluent gate house, of Chstnut Hill Reservoir, looking east. Oct. 31, 1877.

Sudbury River Conduit, B.W.W., div. 4, sec. 15, Nov. 13, 1876. Brickmason gang at the east end of section 16.

Sudbury River Conduit, B.W.W., div. 4, sec. 15, Nov. 13, 1876. View from inside of conduit; brickmasons at work in the east terminal chamber of bridge.

Sudbury River Conduit, B.W.W., div. 4, sec. 17, Nov. 13, 1876. View near rock-cut on sec. 17 showing ledgemen in the foreground and brickmasons in the background.

Sudbury River Conduit, B.W.W., div. 4, sec. 17, Nov. 13, 1876. View near rock-cut showing ledgemen in the foreground and brickmasons in the background.

Sudbury River Conduit, B.W.W., div. 4, sec. 16, Oct. 18, 1876. View taken on top of bridge and looking east.

Sudbury River Conduit, B.W.W., div. 4, sec. 16, Oct. 18, 1876. View taken at the west end of narrow rock cut looking east.

Sudbury River Conduit, B.W.W., div. 4, sec. 16, Oct. 18, 1876. View taken at the east end of rock cut looking west.

Sudbury River Conduit, B.W.W., div. 4, sec. 14, Oct. 18, 1876. View taken from inside conduit looking west on [?] embankment.

Sudbury River Conduit, B.W.W., div. 4, sec. 14, Oct. 18, 1876. View taken at the west end of rock cut on sec. 14 and looking east.

Boston water works, Sudbury River Conduit, 1876, Division III, west siphon chamber, showing 48" pipes for siphon.

Boston water works, Sudbury River Conduit, 1876, Division III, Section 12, showing fill over conduit at Great Plains Ave.

Boston water works, Sudbury River Conduit, 1876, Division 1, Section 1, conduit under Proctor + Albany railroad tracks.