The Surveyor and municipal engineer . er, ). Coch reservoir at a point nearly H miles above the mainwall, and called Careg-Ddn, its precise function being to holdthe water up behind it high enough to charge the aque-duct conveying tho water to Birmingham. It is described assubmerged because until the water has been lowered 40 ft. itwill be drowned and out of sight. Tho necessity for thisdevice comes about in the following way— viz.,— At the Birmingham end of the acquednct the is tobe delivered into a largo service reservoir at Frankley, about6 miles from the centre of the city, who
The Surveyor and municipal engineer . er, ). Coch reservoir at a point nearly H miles above the mainwall, and called Careg-Ddn, its precise function being to holdthe water up behind it high enough to charge the aque-duct conveying tho water to Birmingham. It is described assubmerged because until the water has been lowered 40 ft. itwill be drowned and out of sight. Tho necessity for thisdevice comes about in the following way— viz.,— At the Birmingham end of the acquednct the is tobe delivered into a largo service reservoir at Frankley, about6 miles from the centre of the city, whose top water will bo603 ft. above ordnance datum. From the commencement ofthe acqueduct inside the Caban reservoir to Frankley is adistance of nearly 7-t miles, and in this length the fall re-quired to convey the water is in round figures 170 ft., so thatthe invert of the acqueduct at its inlet will be 770 ft. aboveordnance datum, or 70 ft. higher than tho bod of the river atCaban Cocli. Now the water must of necessity never fall. (SLiilembur, 1SJ7). below this inlet or tho acqueduct could not be oharg<4,0<X).000 would draw downtho water from 822 to 782 in eighty days. Tho quantity ofwater below 782, between Caban Coch damandCareg-Ddadam,i< 2,700,000,000 galons, and would therefore suffice to pay
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectgreatbritain, bookyea
