I very helpful person has given me a plane of the Hanch Tunnel showing its route relative to Lichfield, and the approximate location of some of the access shafts. I recall being told many years back, that a lots of the access shaft were lost or have been built over.
As pumping ceased in 1997, the flow in the tunnel has now reversed, and most likely is full beyond the roof.

One of Lichfield’s best kept secrets
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About Morturn
Historian – Photographer – Filmmaker
Retired construction professional with a passion for public, social and industrial history. I believe in equality, dignity and integrity for all. Don’t like people who try to belittle the ambitions of others.
I am of the opinion that my now life belongs to the whole community and as long as I live, it is my privilege to do for it whatever I can. I want to be thoroughly used up when I die, for the harder I work the more I live.
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