[Gutenberg 15468] • Lectures on Popular and Scientific Subjects

[...]fact. At another colliery near Gateshead (Goose Colliery), 1000 gallons a minute, or 6000 tons of water per day, were pumped out, and only 300 tons of coal were brought up in the same time, and thus the water raised exceeded the coal twenty times. The most astonishing undertaking in mining was the Dalton le Dale Pit, nine miles from Durham. On the 1st June 1840 they pumped out 3285 gallons a minute. Engines were erected which raised 93,000 gallons a minute from a depth of 90 fathoms or 540 feet, and this was done night and day. The amount expended to reach the coal in this pit was 300,000. Mr. Hall estimates the capital invested in the coal trade of the counties of Durham and Northumberland, including[...]."