Viaduct View 8 Traditional Cache
roger-rabbit: Due to the fact that this series is getting very bitty, I'm archiving them all.
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The Harringworth Viaduct or Seaton Viaduct, is 3,825ft (1,159m) long, and is still the longest structure of its type on Britain's railway network.
The Harringworth Viaduct crosses the River Welland on the Rutland and Northamptonshire border, and is a grade II listed structure. It comprises 82 arches, each with a 42ft (12.7m) span. 71 of the supporting piers are 6ft (1.8m) thick, with a further 10 being double thickness and spaced evenly along its length. Each of these can be indentified by a pilaster on its face and were designed to isolate the arches into 'sets', preventing any under-strain from being continued indefinitely from arch to arch. The average height of the arches is 57ft (17.2m), but the highest is 70ft (21.2m). The viaduct is constructed from some 30,000,000 bricks, all manufactured on site, with Derbyshire Gritstone springers, string courses and coping. As well as the bricks, construction required some 20,000 cubic yards of concrete, 19,000 cubic yards of stone, 37,543 cubic yards of lime mortar, and 5,876 cubic yards of cement.
The whole project was completed from the first brick being laid in March 1876, and all 82 arches completed by July 1878. Considering the basic tools used were pick-axes, shovels and barrows, this is a phenomenal achievement with a comparatively small workforce of men and horses.
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