102 HALIFAX WATER WORKS. JOHNSTON. 



estimated capacity of this main when discharging at an eleva- 

 tion of 250 feet was 2,485,000 gallons. There are exits in 

 this main at the end of the 20-inch, at Beaver Dam Brook, at 

 head of Chain Lakes, and at the Dutch Village Eoad. 



In 1893 a new low service main, 27 inches in diameter, was 

 laid from the Chain Lakes. This main follows the route of 

 and is laid alongside the other two supply mains, to the brow 

 of the hill on the western side of the Dutch Village Road, 

 thence striking across the valley in a straight line to Bayer's 

 Road near North Kline Street, thence along Bayer's Road and 

 in prolongation thereof to Kempt Road, and then to Young 

 Street at the corner of Gottingen Street, connecting there with a 

 24-inch main running to Cogswell Street, where the latter joins 

 the 12-inch and 15-inch running from the 24-inch at St. 

 Andrew's Cross. The specification for this pipe calls for three 

 thicknesses |, $-, 1 ^V. the first to test to 250 pounds, and 

 the latter to 300 pounds per square inch, and while this test is 

 being applied the pipes to be struck a series of sharp blows at 

 various points throughout their length with a 3-pound hammer 

 attached to a ha'ndle 16 inches long. The pipes are 12 feet 

 long with turned and bored joints, and coated inside and out 

 with coal-pitch varnish. The contract price delivered in Halifax, 

 free of all charges, was $32.05 per 2,000 pounds for plain pipe 

 and $56.10 for special castings. The contract for excavating 

 the trench was. let for $1.85 per cubic yard for rock and 28 

 cents for earth excavation; measurement limited to a trench 

 4 feet wide. The cost of the 27-inch main laid was $5.71 per 

 lineal foot, inclusive of all charges. The cost of the 24-inch 

 laid in Gottingen Street was $5.52, inclusive of all charges. 

 This main slopes from the lake and from Gottingen Street to 

 the Dutch Village Road, where a 12-inch exit pipe is placed. 



Coating. 



The coating on the high service main and on the 24-inch 

 was ordered as "Smith's patent varnish." This is probablv the 



