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 III, Section 12, sheeted trench heavy sand cutting.

Boston water works, Sudbury River Conduit, 1876, Division III, Section 12, sheeted trench heavy sand cutting.

Boston water works, Sudbury River Conduit, 1876, Division III, Section 10, Waban Valley bridge, south side of "arch A".

Boston water works, Sudbury River Conduit, 1876, Section 10, Waban Valley bridge, view of centering "arch B".

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

Boston water works, Sudbury River Conduit, Nov. 6th, 1876, Division 1, Section 1, gatehouse showing inlet arch to conduit.

Boston water works, Sudbury River Conduit, Nov. 6th, 1876, Division 1, Section 1, view of Farm Pond gate house foundations, looking towards northeast corner of coffer dam.

Boston water works, Sudbury River Conduit, Nov. 6th, 1876, Division 1, Section 1, view of Farm Pond gate house foundations, looking towards northeast corner of coffer dam.

Boston water works, Sudbury River Conduit, Nov. 6th, 1876, Division 1, Section 1, view of Farm Pond gate house foundations, showing west end of coffer dam.