engineering

Surrey Street Pumping Station, Croydon

Surrey Street Pumping Station, Croydon is a engineering topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Surrey Street Pumping Station, Croydon rather than just read about it. In short: Surrey Street Pumping Station is a Grade II listed pumphouse in Croydon, South London, England, that was built in four phases. It is the site of a well that "had been more or less public ever since the town existed".

Key takeaways

Surrey Street Pumping Station, Croydon belongs to engineering; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Surrey Street Pumping Station, Croydon to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Surrey Street Pumping Station, Croydon from memory before moving on to harder problems.

Reference excerpt

Surrey Street Pumping Station is a Grade II listed pumphouse in Croydon, South London, England, that was built in four phases. It is the site of a well that "had been more or less public ever since the town existed". It was opened by the Archbishop of Canterbury on 11 December 1851, making Croydon one of the first towns to have a combined water and sewage system under the Public Health Act 1848 (11 & 12 Vict. c. 63), and to Chadwick’s arterial-venous design. The water was pumped from the wells, up Park Hill to a cylindrical brick reservoir with a domed roof to provide a constant supply of fresh piped water. Prior to its opening, the inhabitants of Croydon used the river Wandle, streams and shallow wells, which were often contaminated by seepage from privies and cesspools. Parts of Norwood were served with water from the Lambeth Waterworks Company, a private company established by the Lambeth Waterworks Act 1785 (25 Geo. 3. c. 89). Soon after it opened, the pumping station was involved in a landmark legal case about the abstraction of water from wells. The opening coincided with a reduction of water in the river Wandle that had been predicted by the river's millers. They believed they had a strong case under riparian law that they should not be harmed by the abstraction. The Lords disagreed and determined on 27 July 1859 that "the course and direction of underground waters were considered too uncertain and too little known, to be the foundation of any (riparian) rights in them". Water levels in the river subsequently increased, suggesting the reason for the low levels in the river was a lack of rainfall. It is somewhat ironic that in 1912 Croydon objected to the abstraction of water at Purley by the East Surrey Water company for fear it would damage their supply.

Phase 1 (1851) The original 1851 engine house is in the northwest corner furthest from Surrey Street in brown brick and bears the date 1851 on its west elevation. The well was enlarged to a depth of 77 feet (23 m) by Thomas Docwra and son. Its diameter decreased in steps from 9 feet (2.7 m) at the top to just 1 foot (0.3 m) at the bottom. The engine house was built on a tall brick plinth over the well to house a pair of 24HP Cornish beam engines from Sandys, Vivian and Co. of Hayle. It was rebuilt by the local builder William Harris using material from the atmospheric railway engine house at Croydon, which the Local Board of Health had purchased from the London, Brighton and South Coast railway company for £250. The Surrey Street pumping house was necessarily taller to house the engines with their 9’ (2.7m) piston stroke and plunger. The doors and windows were also different to ease ingress and egress, and maintain aesthetic proportions. There is at least a nod to the railway's engine house on the north elevation, with a similar Tudor style and roofline gable and dormer. The boiler house and chimney have not survived. To protect the engines, the installer Samuel Hocking invented the weighted balance valve. If the mains riser broke, the valve would close and the engines would work against the weight to maintain a constant load and prevent the engines from speeding up and breaking. The engines could raise 40 gallons with each stroke and by April 1853, less than 18 months after opening, both engines raised over 450,000 gallons daily to supply water to 1,900 homes. Before the end of 1866, the engines were pumping up to 1.5M gallons daily. The engines were powered by steam from three boilers that by June 1867 were in such a dangerous state they could not be used and subsequently shared new boilers installed for the second phase. By about 1876 the engines were used as backup / standby and had certainly stopped pumping by 1894. Water supply was limited to households lower than the reservoir and higher than the sewage irrigation field (near today’s Sainsbury supermarket on the Purley Way), known as a special district. Households within the special district paid higher rates to recover the cost of the works.

Phase 2 (1867)

… excerpt ends here. Continue reading the full article.

Worked examples

Example 1 — a first encounter with Surrey Street Pumping Station, Croydon

Start with the simplest possible case. Write down what Surrey Street Pumping Station, Croydon claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In engineering, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Surrey Street Pumping Station, Croydon before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Surrey Street Pumping Station, Croydon ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Surrey Street Pumping Station, Croydon

In research: Surrey Street Pumping Station, Croydon appears in engineering research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Surrey Street Pumping Station, Croydon in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Surrey Street Pumping Station, Croydon is common in secondary-school and first-year university syllabi. It links to neighbouring topics Former pumping stations, Gothic Revival architecture in London, Grade II listed buildings in the London Borough of Croydon, so understanding it makes those chapters shorter.
In everyday life: Look for Surrey Street Pumping Station, Croydon outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Surrey Street Pumping Station, Croydon in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Surrey Street Pumping Station, Croydon means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Surrey Street Pumping Station, Croydon out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Surrey Street Pumping Station, Croydon in simple terms?

Why does Surrey Street Pumping Station, Croydon matter?

Because it connects several engineering ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Surrey Street Pumping Station, Croydon?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Surrey Street Pumping Station, Croydon.