Not every aspect of the tidal Current energy project went perfectly without problems. At one point the project was within hours of being called off. A replacement drill bit had to be flown in and weather conditions threatened to suspend operation.  The most difficult stage in the installation was the breaking of the drill casing and drill bit. One morning when attempting to attach the barge, the casing which by this time was sunk in the bedrock, twisted off, trapping the drill bit in the ground.

The conditions in August were marginal for the work at sea.

The most amazing part of thew process was that whatever the problems, the engineers proved to be very capable in meeting the challenge and coming up with a problem. This was particularly impressive in that it was the first kind of such an exercise and it was in an ecologically sensitive area  at a time of year when weather  could cause a stop to the process.