It will doubtless however
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these Culverts should be become necessary at times to lower the water in the Reservoir during heavy rains and to enable me to do this I have fixed the 13ft Culvert at so large a size. I calculate that it will discharge 1,566,000 cubic feet per hour.
On a 7-acre Watershed of fall on more than 3/4 of an inch per hour. I do not think the size can safely be reduced, two Culverts however placed side by side will answer the same purpose, or the Culverts might be placed at different levels, or in any way that Mr Rawlinson deems as being the best. The sluice valves for these will be able to pass off 1,566,000 cubic feet per average hour under a pressure of 15 feet.
I should mention that I propose to cut the Bye Wash down to 15 feet above the bottom of the Reservoir in the first instance as all flood water must pass this way during the formation of the first half of the Embankment, after that time the outlet Culvert can be availed of as suggested by Mr. Rawlinson.
As the Bank proceeds and becomes consolidated the Bye Wash will be raised, the Bye Culvert or Culverts being made use of as required. As a guide to the body of water