Iron Mining in Minnesota Volume 1

Iron Mining in Minnesota Volume 1

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1912 edition. Excerpt: an increase of 1,000 gallons of water per minute. This caused further delay pending the arrival and placing of a third sinker. Meanwhile another boiler was being installed. From this time until October 19th every blast brought in more water, calling for more pumps. Very little progress was made. On October 19th the shaft proper was 101 feet from the collar with a central sump 5 feet deep, making 2,700 gallons of water per minute. The following is a digest from the Superintendent's weekly reports: October 26, 1907. Progress for the week, 2 feet. Water, 2,700 gallons. Cracking of a 6-inch discharge pipe caused some delay. Water in the old shaft lowered 6 inches this week. An old well and a spring near by have gone dry. It would seem that we are slowly but surely draining the surface, which is encouraging. November 2. Progress 1 foot. Water, 2,700 gallons. Delays caused by poor firemen and pumpmen. Greatly hampered by scarcity of competent labor. Many makeshifts necessary to keep shaft going at all. Much sand coming in with each blast. ' Trying to get another set of timbers in place so.we can cut off the sand with additional blocking. Water in old shaft lowered 4 inches. November 9. N o progress. Two suction hose broke this week. New set of timbers in place. Blocking effectually cuts off sand. Water in old shaft lowered 4 inches. November 16. No progress. Thursday noon an elbow on the blow-off pipe on the middle boiler broke off. The cut-off valve was above the damaged pipe and it was impossible on account of the escaping steam to cut this boiler out of the battery. Water supply gave out and fires had to be drawn; at one o'clock the boilers were dead. Water in the shaft rose 47 feet. Pumps were recovered and water beaten down at more

Product details

  • Paperback | 74 pages
  • 189 x 246 x 4mm | 150g
  • United States
  • English
  • black & white illustrations
  • 123682735X
  • 9781236827357