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The rod and automatic waste valve, attached to the upper induction valve, work in such a manner that the opening of the lower induction valve involves the closing of the waste valve, and vice-versa. Waste of water cannot therefore take place, and no water can remain in the stock of the hydrant, when the upper valve is closed.

The lower valve being capable of independent action, the temporary removal of the upper valve for repairs does not interfere with the utility of the hydrant.

As previously stated, the works of excavation and pipe laying main included south of Burrard Inlet were carried out by the company by day labour. The average depth of trench for the mains was 3′ 10,′′ and for the sub-mains 3 feet. The cost, including tools, laying pipes, placing specials, erecting hydrants, refilling and tamping trenches, taking up and replacing crossings, and works of a like nature, did not exceed 17 cents per lineal foot.

LETTING THE WATER INTO THE MAINS.

On Wednesday, the 20th of March, 1889, the gate in the well chambers of the dam was partially raised, and water allowed to flow for the first time into the 22" main. The 8" blow off near the rock tunnel was kept open, and the water was not allowed for several days to fill up to the level of the tunnel, and flow into the 16" main. On March 25th at 4 p. m., the gate in the well chambers was opened wide, and a full head of water turned on. At 6 p. m. the 22" main was filled, and began flowing through the tunnel into the 16" main. At 9.45 p. m. the water reached the closed 12" valves, on the north shore of Burrard Inlet. At 10 p.m. the valve controlling the 12" submerged main was opened three-quarters full. At 10 minutes past 10 the water reached the south shore. At 3 a. m. it had reached the termination of the 16" main in the centre of the city, and at 4 a. m. it was discharging fully into False Creek, by means of an 8 inch sub-main opened wide.

It is worthy of note that in the whole length of the mains, not a single joint was found to leak. Such leaks as were discovered occurred at the seams, where the rivetting and split caulking had been imperfectly done. These were speedily repaired by encircling the mains by steel rings, 4 inches wide, made in two halves, and provided with "Lugs."

The lugs were bolted together, above and below the main, the space between the ring and the pipe being filled up with lead, and carefully caulked in the usual manner.

From the drawings accompanying this paper, Plates XVI to XX have been prepared.

FINAL ESTIMATE COVERING ALL WORKS BETWEEN THE SUBMERGED MAIN, BURRARD INLET, AND THE CAPILANO DAM, BASED ON FINAL LOCATION OF PIPE LINE, MAY,

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