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Satterthwaite Bridge
Satterthwaite, Cumbria
Satterthwaite Bridge
associated engineer
Louis Gustave Mouchel
date  1905
era  Modern  |  category  Bridge  |  reference  SD336921
ICE reference number  HEW 1749
photo  Paul Dunkerley / ICE R&D Fund
Almost 9m long, Satterthwaite Bridge spans the road across Grizedale Beck, just south of Satterthwaite. It is one of the first 'ferroconcrete' bridges built in England, and therefore stands as a monument to a new form of technology used in 20th century civil engineering.
The strengthening of concrete with iron or steel was a concept patented in 1892 by the French engineer François Hennebique, who coined the term 'ferroconcrete'. This technique was popularised in the UK from 1897 by his compatriot and fellow engineer, Louis Gustave Mouchel.
Being a 'new' material, the reinforced concrete has almost been used here in the way that masonry would have been. The reinforcement is also very heavy. Masonry has in fact been used for the parapets, which are made of cut Lakeland stone with sandstone label moulds (the projecting curved moulding around the arches), stringcourses and copings. It has also been used for the abutments, possibly backed with mass concrete.
The thickness of the concrete arch at the top is 305mm and 406mm at the spring points. The arch rises to a height of 1.2m. The 1.4m parapets are higher than usual parapets that can be seen in the Lake District.
The copings are of typical Lancashire County Council design — this part of Cumbria was once part of Lancashire. These copings are known as 'Compton Hall Copings' after W. Compton Hall, a well known County Bridgemaster of Lancashire.
Contractors: Yorkshire Hennebique Contracting Company Ltd and Lancashire County Council
Research: PD and AJD
reference sources   CEH NorthBB
Location

Satterthwaite Bridge