TUNNEL PIERCES RESERVOIR
20,000 GALLONS AN HOUR FLOW.
DIFFICULTIES .AT TAWA FLAT.
By Telegraph.-—Press Association
Wellington, Aug. 30.
In connection with tly: driving of the big Tawa Flat tunnel, a shaft was sunk and the headings commenced this morning in addition to the headings at the two exits. The extra heading has so far proved fairly good ground, but going south the hill has been so shaken up 5 by earthquakes of times past that timbering has been necessary right up the face.
To add to these difficulties, a subterranean lake or reservoir was on Tuesday night delivering a flow of 20,000 o-allons an hour, and three Cameron pumps have proved unable to keep the water down. On Wednesday afternoon the water ; had completely filled the heading. The pumps are working away chains under water, but it is only a question of time when the foot of the shaft will be flooded. The grade is one in 124, and the whole position is made very difficult. Underground streams of large dimensions are rare in this kind of work, but reservoirs much less so. It is considered that this is a reservoir. If the present pumps fail to get the water down, extra pumps will be put on.
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Bibliographic details
Taranaki Daily News, 2 September 1929, Page 11
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207TUNNEL PIERCES RESERVOIR Taranaki Daily News, 2 September 1929, Page 11
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