The Peak Speedwell System is located in the village of Castleton, made up of Peak Cavern, Speedwell Mine, James Hall Over Engine Mine and Titan Shaft. The system contains about 18km of cave passage, one of the deepest underground cave dives in the UK, down to a depth of 74 metres; the highest underground pitch in the UK which is 145 metres high, it has six known entrances but only four are usable.
The Environment Agency have installed EA water depth logger at Goosehill Bridge, Castelton. This is now live at: https://check-for-flooding.service.gov.uk/station/9595 . The water depth is updated every 15 minutes and the datum is the crest of the weir that was installed in 1984/5 by TSG and a group from Manchester Poly. The metre ruler on the left bank of the river when looking downstream from the bridge has the same datum so the levels on the web should be the same as the levels on the ruler.. The outputs contributing to the total flow are Peak Cavern, Slop Moll, Peakshole Sough and Russet Well.
Read more: EA Peakshole Water level Logger at Goosehill Bridge, Castleton