20/11/13 - Extended canal and increased the depth along its length. Top layer of stones and pebbles in streambed and now very loose and through to clay level in some parts, has potential to be very deep, would seem the same for the main passage way. Rob removed blocks in bottom of the rift to reveal another way through into current main streamway, now two holes taking water out. Got very wet, and very cold. Will probably need a large pipe taking down as extending canal is very difficult with limited space. Got out to find it sleeting with the road in flood – water pumping out of the manholes, apparently pissed it down whilst we were underground but no change of water levels -  so Streaks must react 'reasonably' slowly to rainfall, which is good news. Cold! (Mike, Rob)