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".

Reverse curve, Summerwell estate, sta. 3421.

East portal, sec. 8, sta. 30978.

West portal of tunnel, sec. 8.

Rock cut, sta. 290, sec. 8.

Bacon's waste weir, sec. 7, sta. 27140.

Bacon's waste weir, sec. 7.

Curve 16, sec. 7.

Big cut, sta. 236.

East portal, sec. 6.

West portal, section 6, sta. 20184.

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

April 1877, gate house.

April 1877, gate house.

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.

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.

Boston water works, Sudbury River Conduit, 1876, Dam no III, north end of Dam, showing foundations of gate house, looking north.

Boston water works, Sudbury River Conduit, 1876, Dam no. III, north end of Dam, looking south towards Hauer's(?).

Boston water works, Sudbury River Conduit, 1876, Dam II, view of foundations, looking west.

Boston water works, Sudbury River Conduit, 1876, Dam I, view showing location of dam and bridges on Winter Street over Sudbury River.

Boston water works, Sudbury River Conduit, Sept. 1876, Dam III, Rubble masonry foundations, southeast corner of gate house.

Boston water works, Sudbury River Conduit, Aug. 1876, Dam no. 1, Pairing below overflow, south side of river.

Boston water works, Sudbury River Conduit, 1876, Dam no. 1, view of foundations, looking towards Frasts(?).

Current testing apparatus.

Sudbury River Conduit, Nov. 6, 1876, Div. I Sec. I, current meter.

Sudbury River Conduit, Nov. 6, 1876, ditch in woods for temporary ... between Farm Pond and Lake Schituate showing apparatus for rating current meter.