5/10/21

Estelle Sandford, James Begley, Mike Moxon, Stu Lindsay, Jonathan Riley, Dave Walker, Fran Campbell and also Stuart MacManus and Mark Denning

2hrs

The weather had been awful in recent days with a lot of rain so we expected the water levels to have risen. Thankfully only slightly over the end dam in the end. Mark had come to check on the electrics ahead of putting a pump in, so he did his checks and assessed it as looking safe and it tripped fine. Mac had come to do some air checks after the last 3 or so weeks of it being quite ‘thick’ to breath and everyone feeling breathless. His results are as below. While all this was going on, Mike and Dave started filling the water containers up from the end and we assisted taking them out. We did several rounds of this and lowered the water level a bit and also the end beyond the dam, so hopefully with long range forecast looking warmer and drier again, the levels will drop off again before we get to a point of needing pumping. After a couple of hours, we headed off to the Waldegrave for sustenance.

 

the results from the CO2 and O2 sensors.

 

End 2.96% CO2 17.83% O2. Pressure 993hPa

Steps 2.4% CO2 18.4% O2

Bottom Entrance shaft  - 0.08% CO2 20.73% O2

 

Interesting was the CO2 was 3.2% in that small alcove above the end pool where there was a heavy drip.