. Annual report of the Metropolitan Water and Sewerage Board. MYSTIC RIVER TUNNEL EXTENSION-Sinking Shaft at Charlestown End of MYSTIC RIVER TUNNEL EXTENSION - Heading in Rock in Tunnel under the River. No. 57.] AND SEWERAGE BOARD. 13 ment was made with the City by which the entire work should becarried out by the Board and the City should pay the expense. The new tunnel is ^built in general of brick carried for a distanceof 273 feet, with an interior diameter of 6 feet, and its centre line isabout 4314 feet below mean low water. The tunnel was finished andthe new pipe line was put in
. Annual report of the Metropolitan Water and Sewerage Board. MYSTIC RIVER TUNNEL EXTENSION-Sinking Shaft at Charlestown End of MYSTIC RIVER TUNNEL EXTENSION - Heading in Rock in Tunnel under the River. No. 57.] AND SEWERAGE BOARD. 13 ment was made with the City by which the entire work should becarried out by the Board and the City should pay the expense. The new tunnel is ^built in general of brick carried for a distanceof 273 feet, with an interior diameter of 6 feet, and its centre line isabout 4314 feet below mean low water. The tunnel was finished andthe new pipe line was put into operation in December. The entirecost of the work as charged to December 31, 1912, was $55,,$50, of which is to be paid by the city of Boston, and $4, is properly chargeable to the Board. The Legislature of 1911 directed the County Commissioners ofEssex County to reconstruct the Fox Hill Bridge over the SaugusRiver between the city of Lynn and the town of Saugus. As theMetropolitan 16-inch water main supplying Swampscott and ^Nahantis laid in the river channel at and in connection with the old bridge,the cons
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