Tag Archives: maintenance

A bridge in London waiting for repairs

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In the middle years of the 1720s, Daniel Defoe described Hammersmith as a village that was growing into a small town:

“… and some talk also of building a fine stone bridge over the Thames …”

It was almost 100 years after Defoe speculated that a bridge across the Thames would be built at Hammersmith. A suspension bridge was constructed between 1824 and 1827. It was the first of this type of bridge to be constructed anywhere near London and the first to span the Thames. James Thorne, writing in 1876, that in outline and simplicity of style, it:

“… remains the best-looking-bridge of its kind on the Thames …”

The bridge was designed by William Tierney Clark (1783-1852), who had been guided in his development of bridge construction techniques by Thomas Telford and John Rennie, who designed the old London Bridge that now stands in Lake Havasu City in Arizona. Clark also designed the suspension bridge (1832) across the Thames at Marlow and the impressive Széchenyi (Chain) Bridge which crosses the River Danube to link Buda and Pest. The latter resembles Clark’s Hammersmith Bridge as depicted in old engravings.

In 1883-37, Clark’s Hammersmith Bridge was replaced by a newer one designed by Joseph Bazalgette (1819-1891). According to Cherry and Pevsner in The Buildings of England. London 2: South, Bazalgette:

“… re-used the piers and abutments. Iron-framed towers clad in cast iron partly gilt, with Frenchy pavilion tops, and elephantine ornament at the approaches … The deck stiffening girders were replaced in a major overhaul in 1973-6.”

This bridge, which was built for use by horses and carts, pedestrians, and the occasional cyclist, long before the advent of heavy motor vehicles such as busses and lorries. It has been closed for repairs several times, causing much nuisance for those who live on both sides of it. In April 2019, Hammersmith and Fulham Council closed the bridge to all motorised traffic. This was done following the discovery of serious cracks in the pedestals that support the bridge. It remained open for pedestrians and cyclists until August 2020, when a heatwave caused further deterioration. Then, the bridge was closed to all users.  

A variety of schemes have been proposed for repairing the bridge and there was some disagreement as to who would pay for the work. In June 2021, Hammersmith and Fulham Council came to a cost-sharing deal to complete the rehabilitation of the Victorian bridge. In July 2021, the bridge was reopened for use by cyclists and pedestrians until 2027. In February 2022, I stepped on the bridge for the first time since it closed. The view from it is marvellous, especially upstream where one gets a good view of the historic buildings lining the waterfront between Hammersmith and Chiswick.

Draining a canal

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EVERY NOW AND THEN, a canal needs repairing. For example, it might have sprung a leak either in its retaining walls or in its clay bottom. In such circumstances and no doubt others, the repair work can only be carried out if the canal is emptied of water, a tall order in a canal that might be many miles in length. Recently, we were walking along the towpath of the Macclesfield Canal, which links Marples Lock on the Peak Forest Canal with Hardings Wood Junction on the Trent and Mersey Canal, when we spotted something that we had never noticed before whilst walking along a canal towpath.

What we saw was a pile of sturdy wooden planks, each with two metal handles attached to their narrowest edges. They looked quite modern. We asked a man, who was walking his dog, about the planks. He explained that they were used to block both ends of a section of canal between two consecutive bridges. When these barricades are lined with plastic sheeting, the water between the two barricades can be drained from the part of the canal between the two waterproofed wooden barriers, Then, work can be carried out on the drained stretch of the canal. The planks are known as ‘stop planks’

Our informant pointed out notches carved in the stonework near to a bridge. The notch is opposite another identical one across the canal. It is into these pairs of notches that the planks we had noticed ate inserted to create a dam, I regard myself as being quite observant, but I have never seen or noticed either this kind of notch or the wooden planks for inserting in them during many long walks along canals in other parts of England. Maybe, they are common, but until we walked beside the Macclesfield Canal, I had never seen them before, Maybe, this is because other methods of damming (see: https://www.rchs.org.uk/wp-content/uploads/2017/01/OP-128.pdf) are also employed in addition to that which we spotted on the Macclesfield Canal at Bollington in Cheshire.