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Haggs Vein and its Correlation with old Plans, Nentsberry Haggs Mine, (19/12/14)

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It has been a long while since we have last been in Nentsberry Haggs and having starting drawing up a set of plans for the mine I was wanting to check a few things out along the drive in from the adit, so a quick micro mission was planned for Friday evening to have a look at Haggs Vein, which is what the horse level into the mine follows. I have seen some cross sections of the mentioned vein and Cowhill's, Carr's, Brownley Hill East and Wellgill Cross Veins all intersect with it, this was of most interest.

By the time we got ready it was around 19:00, cold and very blowy outside the adit. Getting underground was a welcome pleasure - it was most definitely warmer. We entered via the new gate (note that there is a bolt and nut on it that needs to be undone and redone) and headed in, wondering how our dig was holding up. Armed with new knowledge from the cross sections, the first part of the horse level is driven under the Four Fathom Limestone, and this can clearly be seen as the massive blocks above your head. Reaching the dig, all was stable with it with no material had come down. Passing through the dig, we entered the deep water. At this point the Four Fathom Limestone starts to rise above the horse level, which explained the gradually higher workings that we could see above. After 200m or so, we came to some stacked deads on the right hand side. This is actually a flooded shaft going down to the Nentsberry Haggs Low Level. Passing the deads, a little further on the right you can see a dog legged back filled passage that connects with it. This is the little diamond area and shaft that is shown on a number of plans. Another 200m took us to the Cowhill Cross Vein junction; going down that branch we reached a rise that gives access to the Four Fathom Limestone (the strata on Cowhill Cross Vein moves up on the fault) and further on there where two sumps, which tried the Three Yard Limestone below the horse level. Back on the main horse level 100m on, we came to the Air Drift junction. This looked to be back filled or collapsed. Another 150m and we reached the intersection with Carr's Vein and shortly after that Brownley Hill East Cross Vein. The boundary with Carr's Vein is marked by the appearance of the Great Limestone above the horse level, the result of a massive throw down on these two veins.

At the Brownley Hill East Cross Vein intersection, there is access into the Great Limestone by two rises and the workings extend by around 100m to the northwest and 200m to the south east. We climbed up and had a look along the south east branch. Part of the workings here had a number of natural fissures that can be seen in some parts of the Great Limestone around Alston Moor, there were stacked deads and we also found the remains of what looked to be an old Mont d'Or style cheese - very odd or we just have the wrong end of the stick on that one. Once back down in the level, we had a Christmas port drink.

We continued up the level remarking on the number of calcite formations that can be seen, until we reached the left and right junction that marks the Wellgill Cross Vein. Here the Great Limestone shifts up again on the north east side. That was as far as we were going to be going this evening, we needed food. By the time we got out it was 22:00, and coupled with getting back to base, cleaned up, we finally ate some nice dinner just before 23:00. It was washed down with two bottles of red wine - it's Christmas.