Just been across to have a look at the Harnisha Burn mine:- river levels have dropped but it doesn't appear that the Harnisha burn itself rose that far. The water coming out of the mine has also dropped and is about twice wellie depth, peaty in colour, moving slowly and draining into the ground some distance away. Further back above the entrance and almost at right angles to it is a second level which partially collapsed ages ago and from which is flowing quite an amount of water. It also contains half a ton of empty beer and lager cans..... a present from the picnic brigade.
This drains into a sink hole and reappears from under a spoil heap near the Harnisha Burn adit and then disappears down another sink hole. Neither of the two water flows seem to discharge into the nearby burn - a bottle of fluorescine dye would be really useful here, but the NRA would no doubt have something to say about that.
I'll post a couple of pics I took today on the Harnisha album when I get the chance.