
- Milwr Outfall - Pascoe Ltd
A boring water outfall.

- Milwr Tunnel - own work
Where that water comes from.
An obscure claim to fame, this one. The Milwr Tunnel that has its outfall into the Dee Estuary. What's its claim to fame ? The 10 mile long tunnel - part of which shown in the above photo - actually drains 60 miles of passages and tunnels around North Wales.
"It's well known among the caving community, but lying beneath Flintshire is what is believed to be Britain's longest network of underground tunnels.
The Halkyn District United Mines extending over 60 miles is made up of a labyrinth of mines, lodes and natural caves over several levels.
The company formed in 1928 after amalgamating several existing lead, zinc and limestone mining companies in a bid to continue the driving of the the Milwr tunnel, also known as the Sea-level tunnel.
The 10-mile long passage running from the Dee Estuary in Bagillt to Cadole, near Loggerheads was originally built in 1897 to drain the old Alyn Valley lead mines beneath Halkyn Mountain that were plagued with flooding in their lower levels.
Excluding its branches, Milwr tunnel is the longest single mines drainage tunnel in the UK - draining over 50 veins.
It also created over 60 miles of interconnected passageways across the network - making it the longest network in Britain.
Today, it discharges at least 23 million gallons of water into the Dee Estuary every day."
https://www.dailypost.co.uk/news/north- ... s-17103017
So now you know.
