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| Received 1/6/03 DoLGE PA 03/0632 Town and Country Planning Acts 1934 to 1999 P&L White Co. and Co. CONTROL DIRECTOR | ||
| Decision Officer Initials | ||
| Initial Decision | Approved | 3/10/03 |
| Review Decision | ||
| Repeat Decision | ||
| Unended |
Ontario Water District Ontario Water District Ontario Water District Ontario Water District Ontario Water District
In order to construct the water intake it will be necessary to remove approximately two cubic metres of earth from the soil flat adjacent to the western side of the weir. The river is at present diverted from this area due to the build up of silts over some decades, which has in turn gone to grass. (See plate 1)
The river can be temporally diverted further from this location by way of sand bags to form a coffer dam barrier approximately six feet from the western wall of the river. This will allow a small area of earth to be removed to give a working area of 7 x 5 feet.
It will be necessary to remove stones from the river bed to a depth of twelve inches to permit the construction of a concrete base for the intake and ensure a suitable catchment depth. (See diagram 1)
A cut six inches in depth and six inches wide will be made into the top of the weir immediately next to the western wall to accommodate the outflow pipe. This will also act to drain the working area in preparation for the concrete base.
This will comprise of two component stages after the installation of the base which will be 1.2 m in length by 0.76 m wide. (See diagram 2)
The casing will be 0.6 m high and open ended with a control gate to accept water and shall have a six inch (150mm) flow outlet at the southern end.
Debris traps will be fitted inside the casing.
The casing wall will be 150 mm thick and the structure will be made from cast concrete to BS8007. (See plate 2)
The concrete will be mixed on site and delivered into the shuttering by hand to eliminate any possibility of the concrete mixing with river water.
The feed out flow will be of six inch inside diameter and have an outside diameter of approximately seven inches. A gate valve will be fitted to the pipe on the outside of the water retaining structure for maintenance purposes. (See diagram 3)
It will be necessary for the pipe to be secured to the Western wall of the river for a distance of seventy metres where it will come into contact with the original lade. The pipe will be affixed to the wall at one metre intervals with pipe hangers secured with plastic plug and coach screws.
The pipe will be of a dark plastic to maintain an original appearance.
The original stone built lade runs for a distance of one hundred and forty metres through scrubland before running through an arched tunnel below the Ramsey road. Although densely over grown, the open lade and tunnel is still in existence. The proposed pipe will sit within the lade and will not be visible from the river walks other than where the pipe will be attached to the river wall. The wall has collapsed (see plate 3) approximately sixty metres down stream from the weir and it will be necessary to bridge the gap with a RSJ to support the pipe. The pipe will leave the open lade and run immediately into the tunnel below the Ramsey road for a distance of seventy seven meters running against the eastern wall at floor level. On exiting the tunnel behind the toilets, it will be necessary to cut a trench to depth of five feet to gain a clear route to the wall of the upper path (Formerly the lade) subject to agreement with D.O.T. drainage engineers. (See diagram 4 ) The pipe will again be fixed to this wall at one metre intervals where it will turn to a rising column to discharge onto the proposed wooden lade.
The wheel case originally contained a forty-two foot wheel with the axle being sat at the floors level. This means that the wheel pit must have been three metres deeper than the river bed and would have required a drainage tunnel running for some distance to a point where discharge would be above river level. (See diagram 5 ) This tunnel lies approximately two meters below the level of the floors and is assumed to parallel the river. (Tunnel route marked in yellow on floors plan) The tailrace outflow culvert was found approximately one hundred and fifty metres down steam on the eastern side of the river. This was confirmed to be the discharge point following a Theodolite survey. It is uncertain if the tunnel remains in an intact condition and this can only be investigated after the wheel pit has been excavated. In the event of the tunnel being unserviceable through collapse, a second option is to install a submersible pump in the base of the wheel pit with a three metre rising main to be discharged through the wheel case into the river.
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