Martin Ludgate
<[EMAIL PROTECTED]> wrote:
>In message <[EMAIL PROTECTED]>
>, Adrian Stott <[EMAIL PROTECTED]> writes
>>That gets us back to the previous question of how deep the pound (and
>>the tunnel in particular) is.
>
>It appears to be deep enough at the moment that 3ft draft boats
>can get through without problems.
>
>My understanding is that the reasons the water level wasn't
>lowered any further during the recent works were mainly:
>
>(1) the runoff weir would need to be rebuilt (rather than just the
>planks removed)
>
>(2) there is a culvert under the canal which has been patched in
>concrete, and would need to be rebuilt to maintain depth.
>
>Neither of these is insuperable; however they were beyond the
>budget that could reasonably be expected to be raised from the
>available sources in the timescale of the largely volunteer-run
>Destination Froghall project.
>
>But I'm not sure how much further the water level of the canal in
>general along this pound could be lowered without giving
>problems for deep draft boats. I suspect not very much.
Perhaps the shallowest point over something solid is the bottom of the
tunnel? If so, what about the possibility of blasting out some of the
rock involved (I *think* the bottom is rock, not a brick invert),
either to allow for a lower water level or to create enough depth
(just in the tunnel) for the caisson solution? Possibly easier and
less risky than blasting rock of the tunnel roof?
IIRC, the level of this pound was raised a decade or two ago as part
of a scheme to increase the flow along it and thus to discourage reed
growth. Was that ever reversed?
Is it possible to determine what the original level was, and how much
(if at all) the current level departs from it?
An interesting question which becomes more relevant with each further
lock the Uttoxeter lot reopens.
Adrian
Adrian Stott
07956-299966
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