--- In [email protected], Adrian Stott <[EMAIL PROTECTED]> wrote:
>
> David Cragg <[EMAIL PROTECTED]> wrote:
>
> >On the S&W they seem to use two systems. The one used above
Compton previously was mallet man installing (we assume) coir rolls
held to the old bank with the stakes. The system used below Compton
on the offside involves stakes and wires (with anchors in bank) with
a black porous material being installed, (narrowing the channel by
anything up to a quarter in places) then dredgings are dumped behind
the material.
>
> Where the bank has eroded away (and in some lengths of some
waterways
> this has happened to an amazing degree), it may be considered a good
> thing to recover the original line of the bank as this can reduce
> future erosion by eliminating beaches, and if you are doing that you
> can sensibly put dredgings behind the new edge.
>
> However, it is definitely not a good thing IMHO to use this method
to
> make the waterway narrower than it was built. This was done e.g. on
> the Rochdale during restoration, where IIRC the spoil form dredging
> undertaken to reopen the route was simply dumped in the channel
> against the (original) waterway walls in (too) many locations, and
> held in place in the way you describe. This was done to avoid the
> cost of removing the stuff. The result is a seriously reduced water
> cross-section, making life difficult for those with broad and wide
> craft. Of course, it was a "temporary" solution, but I believe the
> spoil is still there? Is that "temporary" as in the pyramid of
Gizeh?
>
> Which has happened at Compton?
>
> Adrian
>
> .
>
>
> Adrian Stott
> 07956-299966
>
The coir edging has been put on the towpath edge but NOT filled in
behind. The weeds are allowed to grow to conceal the voids. Even when
the edge has been cut it is difficult to see the voids. Roger took
his life in his hands jumped and hoped.
Sue
