Well, the noise from the Tesco pipeline is no longer a problem. They achieved this by
- extending the pipe lagging up, over and down the other side of Harbour Road (see pictures);
- replacing gravel with sand.
The first implication is that Tesco and EDDC have lost all credibility in predicting the outcomes of this project. In July last year we pointed out that pumping gravel would be much noisier than they predicted; but we were ignored. Then, in March this year, we pointed out to EDDC that the pipe was unlagged in the noisiest section going over Harbour Road - but this was ignored, also. So, instead of lagging the pipe on the ground, they took time out for a photo session and then had to do the lagging in mid-air (see pictures).
The next problem is getting hold of the sand. The gravel came from the Isle of Wight every 24 hours or so. The sand has to come from Wales, requiring 36 hours for the round trip. So, the infill time will be extended by 50%. As well as extending the nuisance time for the town, this will cost Tesco a fortune in extra project time. Isn't that a shame.
The third problem is the structural implications of using sand instead of gravel to raise the site level. Will a heap of sand be as stable under flood conditions as a heap of gravel ? No doubt Tesco and/or EDDC will tell us that it will; but they made such a mess of the noise issue that nothing they say can now be left unchecked.
Our soils consultant needs to see the particle size analysis of the sand before commenting on stability. We have asked for this data, and will report back when we have more information.