Cwmbran Junction (Underwater)

Station 3A. Cwmbran Junction - Underwater Data and Photo



If you are a fully trained/qualified cave diver (Full Cave) and competent in a sidemount configuration, we would welcome your underwater data observations and visibility measurements.

Please ensure that you are suitably qualified to undertake the dive. Project Baseline does not accept any responsibility for anyone undertaking a cave dive without appropriate training. Full overhead i.e Full Cave training is required for this observation station.

Primary line begins at the large boulder at the foot of the
entrance slope.

Lay a primary line from the bolt at the surface and tie in to the orange main line, which begins at a large boulder just down slope of the entrance. 
Dive upstream for a few metres and stop at Cwmbran junction, which is an obvious junction in the line, where the 3rd branch goes steeply up to the left into branches and the often blocked Cwmbran entrance.

Secchi disc at Station 3A Cwmbran JunctionStation 3A is the 
underwater station and a

The secchi disc is located just upstream of Cwmbran junction 
(the first line junction you come to) at approximately 3m depth and 28m from dive base at Tradesman’s entrance.

Ensure you are the first diver in the water.





To complete a set of observations at Station 3A:

- Take a depth reading at the secchi disc
- Take a water temperature reading at the secchi disc
- Clip a tape measure or knotted/marked line with distance markers to the loop on the secchi disc and reverse away until only one colour is visible. Wait for any silt/disturbed particles to disappear before taking the measurement. 
- Make a note of the type of light used (hand held or helmet mounted - please do not use both together) and make a note of the type of depth/temperature instrument.
- Take a photo or screen grab from video of Cwmbran junction, facing upstream.
- Make a note of any trout, bullheads, litter etc.
- Fill out the date form here: Data Form

Cwmbran Junction (looking downstream)