What are you doing with that pole? Ah ground electromagnetic conductivity test for the hydro pipes. “thats nice”

The new track by the proposed site for the powerhouse at Hafod y Llan Gentlemen about to start the soil electrical conductivity test

The new track by the proposed site for the powerhouse at Hafod y Llan. Gentlemen about to start the soil electrical conductivity test

Saw two men at Hafod y Llan walking around with a GPS unit and a 6ft tube which did stand out on the first wet day we have had for a month. This was also on the day we spent with a Welsh government officer discussing the National Trusts ambitions for energy  but also what we are doing.

The gentlemen concerned were doing electromagnetic soil conductivity mapping exercise and like most people i didn’t have a clue. But if you are about to bury very expensive ductile iron pipes for your hydro and need to assess corrosion likelihood but also if you need to understand how to design an earthing / grounding grid then this is an effective approach (and quick)

The work on the mountain is progressing well and the contractor is getting ready to receive the pipes in the next two weeks or so. The track is being completed and  given a top dress ready for tracking up and down the mountain with machines and materials e.g. the butt welder likes a nice level site to join the pipes together. The sub base being used as top dressing for the track will later be used as bedding material around the pipe

Preparing the river diversion to create a wet area to build the weir. Coffer dam will be built out of the dumpy bags flown up the mountain earlier

Preparing the river diversion to create a dry area to build the weir. Coffer dam will be built from the dumpy bags which were flown up the mountain earlier. River level still quite low and so its a good time to get some of the heavy work in place

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