*See more Queensbury tunnel photos here
This is the watery view peering down into Queensbury tunnel from the Strines cutting.
The pump has done a good job draining the water out of the tunnel, but there was still around three feet of water blocking access to this part of the tunnel. At one time this tunnel was totally submerged under water as can be seen here
This end of the tunnel is in very poor condition, several big stones in the tunnel roof lining are hanging on by a thread. As far as I can work out the blue lagoon is caused by the crushed limestone aggregate they used to fill in the cutting. The main active ingredient of agricultural limestone is calcium carbonate, It's the calcium carbonate which is responsible for turning the water vivid blue. Most blue lagoons are often to be found in old quarry sites e.t.c. It can't harm the water too much though, we saw a good few fish swimming about in it.