CO129-121 - Sir MacDonnell - 1867 [3-4] — Page 332

CO129 Colonial Office Hong Kong Records 理藩院香港檔案 All AI Reviewed

It will doubtless however

329

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

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2026-05-19 17:25:54 · NVIDIA / meta/llama-4-maverick-17b-128e-instruct

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It will doubtless however 329 Z 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

Baseline (Original)

b It will doubtless however 329 Z these Culverts should be become necessary attimes the to lower the water in Reservoir during heavy rains and to enable move to do this I have fixed the 13ye Culvert at so large a size. I calculate that it will discharge 1566,000 € jt per hour. ora, 7acre the Watershed of fall on 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 ansu the same purpose, or the Culverts mu right be placed at different levels, orin any way that Mr Rawlinson rends as being the best. The sluice valves for these able to pass off 1566,000 ft per average hour under on pressure of 15 feet. I should mention that I propose to cut the Bye Wash = down to 15 feet above the the Reservoirin bottom of the first instance as all flood way water must pass this during the formation of the first half of the Embark ・ment, after that time the outlet Culvert canço vailed of boothe suggested by Mr. Rawlinson. As the Bank proceeds and becorres 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

2026-05-19 17:25:54 · Baseline

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It will doubtless however

329

these Culverts should be

become necessary

attimes

the

to lower the water in

Reservoir during heavy

rains and to enable move

to do this I have fixed the

13ye Culvert at so

large a

size. I calculate that it

will discharge 1566,000 € jt per hour.

ora, 7acre

the Watershed of

fall on

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 ansu the same purpose, or the Culverts mu right be placed

at different levels, orin

any way

that Mr Rawlinson

rends as

being the

best. The sluice valves for

these

able to pass off 1566,000 ft per

average

hour under on

pressure of 15 feet.

I should mention that I

propose to cut the Bye Wash

down to 15 feet above the

the Reservoirin

bottom of

the first instance as all

flood

way

water must pass this

during the formation

of the first half of the Embark

・ment, after that time the

outlet Culvert canço

vailed of

boothe

suggested by

Mr. Rawlinson.

As the Bank proceeds

and becorres

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

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