The old calibrated guage has been replaced on the lower meig, just below the put in below the dam. The numbers are different from the old ones so 4 is now a minimum level rather than about 2.8

Over the winter it looks like a big release has shifted some of the boulders around the stilling basin, so the water doesn't look as high below the dam. If you used to guage the level by the amount of concrete blocks covered, there will be more concrete showing for the same level.