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Hundred Foot Pumping Station, Hundred Foot Bank, Pymoor

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view from road
Photo: Eddy Edwards, June 2010, looking s-w from the bank of the 100 Foot River

page last updated
19 October 2013

If visted before, please "refresh" page to see latest version.

aerial view of site
satellite view by Google
Tidal river left-centre to top. IDB drain bottom right divides into two intake channels.
view approaching from north
Photo: Eddy Edwards, Aug 2011
view from the north shows how close the station is to the road

electric house from road
Photo: Eddy Edwards, June 2010
the electric station seen from the top of barrier bank.
This pumping station, or "engine", a couple of miles north of Pymoor, sits just a few feet from the B1411 road on the eastern side of the South Level barrier bank and the Hundred Foot/New Bedford River. It was built in 1830 to replace wind drainage-mills.

What you see as you drive past are the original buildings shown above, once all part of the coal-fueled steam-engine station, but now used as workshops and for housing a stand-by diesel engine with its pump and oil tanks.

What you may not notice at first is to the left, and further away and below the road - a small unprepossessing building which is part of the "New" electric-powered pumping station used today. 

The best way to appreciate the size and spread of this station is to walk along the footpath just outside the northern edge of the site, and look back from beyond where the intake drain splits into two channels, where you will see the view below.
The station is owned and operated by the local drainage authority, the Littleport & Downham Internal Drainage Board, which is responsible for draining 13,000 hectares (32,000 acres) of the South Level, and is the largest member of the Ely Group of IDBs

This page was first posted early in 2010 based on my own observations and research.
In May 2013 website visitor Chris Holley of Stretham contacted me and later introduced me to John (JS) Martin, a member and ex-chairman of the IDB who kindly provided documents and gave a guided tour of the station which has enabled me to correct and add much (gradually) to my original page.
I am greatly indebted to both.

Left to right
  • Manager's house & garden (now privately owned)
  • (Scoop) Wheel house
  • Intake and weed grill below
  • Engine house, 3 stories
  • more of Intake grill below.
  • Lower sections of chimney
  • Boiler house behind.
  • Workshop (once the coking shed) with a lower store or workshop in front.
  • Access track for weed-cart.
  • Green covers (on top of the 100 Ft river bank) over the new discharge pipes.
  • Intake grill with automatic weed grab above it.
  • Black pipes above grill cover electric pumps and motors
  • Control house
  • electricity sub-station, part hidden by bush.

Note roofing on the old station. Engine house is slate tiled but other buldings appear to have corrugated asbestos sheets which were not produced until the 1920s, I wonder what the original roofing was?

complete site
Photo: Eddy Edwards, June 2010, looking n-w
Left and centre are the buildings of the old steam/diesel station, on the right the "New" electric station.

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Potted history

years engine maker rating discharge/remarks/other ooutput  
1756-1830 Wind          
1830-1882 Steam
80hp scoopwheel 37'5" diam increased 1844 to 41'8"    
1882-1914 Steam
Butterley 224hp new scoopwheel 50' diam, weight 75tons!    
1911        all 3 boilers replaced by high press're Lancashires     
1914  Butterley beam engine & scoopwheel scrapped.   
1914-1950 Steam
400hp Gwynnes 50" centrigugal pump 212 tons/min  
1926-1965 Oil (diesel) Mirrlees 230hp supplementary engine installed in new house, with new intake, & 36" Gwynnes pump 110 tons/min 1
1950       Chimney removed in Sept    
1950- now Oil (diesel) Ruston- Hornsby 540hp
replaced Gwynnes engine
but driving Gwynns pump.
On stand-by since 1985
200 tons/min 4
1965    Mirrlees    engine sold     
1985        Mirrlees h'se demolished    
1985        old steam station made Grade II* listed building.    
1986 - now Electric
3 x Flygt submersible   Near site of Mirrlees with same intake channel.
3 new discharge pipes
Total 300 tons/min
(1.7 cumecs)

ref source
1 Littleport & Downham IDB: Hundred Foot Pumping Station, KSG Hinde, 1987
2 Littleport & Downham IDB: A Chronicle, AT Goodge, 1995
3 Littleport & Downham IDB: Information leaflet, AT Goodge, 2003
4 Landmark Publishing: Fenland Pumping Engines, KSG Hinde
5 Mr Hinde quotes 540 bhp; the website quotes 650bhp at 500rpm (540bhp for the 5-cyl version)

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beam of 1830 engine
The 26ft long beam of the Butterley
1830 beam engine c1913
the 26ft 3in diameter flywheel c1913
(from photos displayed on wall)


Early buildings
The rear intake-side of the steam engine buildings seen c1935
from photo by PLL Keiler or Keiller
The pumping station was built in 1830 to a design by Joseph Glynn of the Butterley Company of Derby. Glynn also designed the original Butterley 30hp beam engine. The engine was virtually the same as the restored one at Stretham Old Engine.

Meticulous records were kept by the Engine Driver of the running hours and coal consumption. In the year April 1841 to March 1843 (presumably a wet year) the engine ran for 192 days and 96 nights, a total of 3729 hours, and 1,397 tons of coal were delivered. In Oct 1861, the log shows that on the 22nd nearly 76 tons were received from Captain Cooper, at a cost of 15s 6p per ton plus 6d a ton for porters.

Glynn and Butterley supplied package deals of plant and buildings to many of the early steam-engine stations in the fens. Glynn is sometimes confused with Gwynne, a family-owned company that built the second steam engine here (see below) which wasn't founded until 1849. Even the citation on the English Heritage site is wrong in that respect.

It was the District's second steam engine, replacing (one of ?) seventy-five windmills in the area which apparently hadn't been able to cope with the heavy rains of 1824.

It was built with gault bricks on a raft of 600 piles with 300,000 bricks (source: English Heritage as above).

Log book
Typical log book

Front of engine house (left) and wheelhouse and discharge into the tidal river. There are two gates, can't tell if flap or lift, or whether one or both are used.
Wheel house and discharge
Photo: Eddy Edwards, June 2011,  from the west bank of the river after a long trek from Suspension Br.

1914 Gwynnes steam engines
Gwynnes 1914 engine seen in 1949
(from Mr Hinde's book)
The Butterley engine was considerably improved in 1882 by alterations to valve gear and increasing boiler pressure. The new output of 224hp enabled a larger scoopwheel to be fitted, 50 feet in diameter and weighing 75 tons, the biggest in the fens. (Source: HC Darby, p198).  The new wheel was required due to further shrinkage of the soil lowering the level of the fen lands.

In 1911, the three boilers were replaced with high-pressure Lancashire boilers. I don't know whether this was because the old boilers, two of which were 42 years old and the third 36 years, were simply worn out, which is quite possible, or whether it was the first stage of plans to completely re-equip the station. Anyway, three years later, in 1914, the Butterley beam engine and scoopwheel were replaced by a vertical steam engine, by Gwynnes of Hammersmith in West London, coupled to a Gwynnes 50-inch centrifugal pump situated in the old wheelhouse. Perhaps if the boilers hadn't been replaced, the Board may have decided to convert the plant to oil like the one at Methwold & Feltwell in 1913.

The station was fuelled by coal, presumably brought up the tidal Hundred Foot River by fen lighters from the port of King's Lynn, and discharged by hand, labourers barrowing the coal over the bank and into the coal yard or coking house north of the boilerhouse.
on the left, the wheelhouse protrudes right to the road edge. On the right can be seen brickwork in the bank. view approaching from north
Photo: Eddy Edwards, Aug 2011

Buldings can often tell you a lot about themselves.
The wall plates tell us who made them
the "Eagle Foundry Co Ely".
Unfortunately their offices at 6a Downham Road Ely are now those of a distance learning centre for dental nurses.

Photo: Eddy Edwards, June 2010, looking north
Note the green "lean-to" on the gable wall. More about that further down.

The height of the wheelhouse roof has changed three times.

If you look closely you will see a line on the engine house wall about 1½ feet above the current roof, and I assume that would have been the original height in 1830.

Much easier to see from the change of brick colour, is the position the roof was raised to in 1882 to accomodate the larger wheel. (Also note the two top-floor windows in the side of the engine house that had to be bricked up then.)

I don't know when or why the roof was lowered, maybe in 1914 when the scoopwheel was replaced by a pump?

Above the arched window of the engine house roadside gable-end (see above centre) a stone is inset inscribed with a now much quoted rhyme.

Photo: Eddy Edwards, June 2010
These Fens have oft times been by Water drown'd
Science a remedy in Water found
The powers of Steam she said shall be employ'd
And the Destroyer by Itself destroy'd"

Erected A.D. 1830.

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To the left of the window another plaque or stone gives a brief history

Photo: Eddy Edwards, June 2010

1926 Mirrlees house
The 1926 Mirrlees house.
Note cylindrical oil tanks on right.
Photo from KSG Hinde's book


In 1926 a 230hp Mirrlees oil engine was installed in a new engine house (see left) built north-east of the steam house, at the head of a new channel cut from the IDB's drain. Note from the aerial photo on the right that the Mirlees House was in line with the steam station and the red-roofed bungalow at top-right.).

This engine was coupled to a new 36" Gwynnes pump and could discharge 100 tons per minute.  It ran in addition to the 200 tons per minute 1914 Gwynnes steam-driven set, thereby increasing potential output by 50% to 300 tons/min.

I don't know what type or model the Mirrlees was, but one of similar age and power is at the Prickwillow Museum. and their website has some photos & video.

The Mirrlees engine was sold in 1965 but the house remained until 1985 when it was demolished to make way for the new electric plant.

aerial view c1971 from CCAN Aerial view of the station c1971.

Photo: was on the CCAN/Pymoor archives but now unavailable there.
1951 Ruston seen in 1986
the Ruston engine seen in 1996
Photo by Chris Allen,
In 1951 a Ruston Hornsby 6 cylinder water-cooled turbo charged diesel engine, model 6VEBX weighing nearly 15 tons (rated at 540 bhp according to Mr KSG Hinde) was installed in the steam house to drive the 1914 Gwynne 50" pump (via a 90˚-turn gearbox) in place of the 1914 Gwynne steam engine. Output said to be 200 tons per minute, virtually the same as the Gwynnes steam engine.
Ruston Diesel engine in old steam engine house
Photo: Eddy Edwards, July 2013 - click for close up of the engine
Above, Mr JS (John) Martin, a member and ex-Chairman of the IDB Board is examining the work log. There are very few changes compared with the scene 17 years earlier (photo on left).

1951 Ruston seen in 1986
the 1914 50-inch Gwynnes pump in the scoopwheel house. It towers above the door to the left
Photo: Eddy Edwards, July 2013
  The Ruston became "redundant" in 1986 when the new electric-powered station was completed, but was retained as an emergency stand-by. It was used in Dec 2012 coupled with the 1914 Gwynnes pump during high rainfall and failure of an electric pump. See report below where there is also link to a video. of a running engine.

According to the citation on the English Heritage page made when the station was listed in Feb 1985, the paved second floor of the steam engine house and stair was intact; and the lower galleries had been removed.

The old Lancashire coal-fired boilers that fired the steam engine have been retained and converted to store the diesel fuel.

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aerial view of site
Date above intake pump housings
Photo: Eddy Edwards, July 2013

aerial view of site
satellite view c2012 by Google
Tidal river left centre to top. IDB drain bottom right divides into two intake channels, the new one above.


Electricity took over from diesel in 1986. The 1926 building at the head of the second cut that had housed the Mirrlees diesel engine was demolished (the engine was removed earlier, see above) and the "New Hundred Foot Pumping Station" built to the south-east of the Mirlees House, i.e. further away from the road.

The oft-quoted statement that the new electric station was built on the Mirrlees site seems incorrect when comparing the satelite view on the left with the c1971 aerial photo on the right (the latter was on the CCAN/ Pymoor Community Archive website in 2010 but unavailable there in 2013).

A new intake was constructed in the channel that had served the Mirlees, with three submersible Flyght motors and close-coupled pumps. A control building and electricity sub-station were constructed alongside,

Driving past the site it is easy to miss the New Station. The only signs are a small nondescript brick building, a couple of poles and an odd looking steel structure above the end of a drain.
aerial view c1971 from CCAN Aerial view of the station c1971.
Photo: was on the CCAN/Pymoor archives but now unavailable there.
electric house from road
Photos: Eddy Edwards, June 2010
Above is the New Station as seen from Hundred Foot River bank. The gate and track on the left leads to the sub-station with its wooden fencing. The small brick building is the control room, and the steel structure is a weed grab. Below that, and hidden from the road, are three steel pipes housing the powerful electric motors and pumps.
electric house and intake Housings for the electric pumps cannot be seen from the road.
Photo: Eddy Edwards, July 2013
Modern sophisticated weed grab
discharges into a rather unsophisticated old farm cart.
weed grab and cart Photo: Eddy Edwards, June '10
Don't stand near the cart - the grab can start up without warning at any time
Below is the station seen from the back. The weed grab (which operates automatically) was not part of the original design, and is a relatively later addition.
electric house and intake Photos: Eddy Edwards, June 2010

electric house control cabinets
inside the control house
Photo: Eddy Edwards, July 2013

Building the New Pumping Station

electric house and intake Plaque inside control room commemorating the official opening March 1987
Photo: Eddy Edwards, July 2013
discharge pipes Photo: Eddy Edwards, June 2010

Discharge pipes and Irrigation Slacker

Across the road and over the river bank can be seen the three huge discharge pipes. A syphon-breaker valve is built into each pipe to prevent water flowing from the 100 Foot River into the IDB drain when the pumps are not operating. The valve chamber is covered by the green plastic (GRP) housing. discharge pipes seen from far bank Photo: Eddy Edwards, June 2011
Photo above was taken from the far bank after walking from Suspension Bridge en route to the railway viaduct.
irigation slacker control rod
Photo: Eddy Edwards, Apr 2012
top of slacker control rod

irigation inlet weed grill
Photo: Eddy Edwards, Apr 2012
weed grill around inlet slacker
irigation pipe control access
Photo: Eddy Edwards, July 2013
access to irigation divertor valve.
In 1986, during construction of the new electric pumping station, an irrigation inlet was incorporated, to take water from the Hundred Foot/New Bedford River to the IDB's drain. Between the centre and right-hand discharge pipes (see above, and above right) there is a manually operated rod which controls the irrigation slacker which can let water into the IDB system from the tidal river.

When opened, water flows through a 10 inch pipe to a point in the grassy area about half-way between road and the new intake where there is a manhole cover giving access to a diverter valve allowing discharge into into the old channel (see photos) or into a field drain to the northeast.

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irigation outlet
Photo: Eddy Edwards, July 2013
irigation outlet into old channel seen from back of old station.
The "new" channel is at far left
Tracked excavator cab
Liebherr R902 tracked excavator
II guess mid 1980s-90s vintage with a very, very long reach!
Tracked excavator boom extended
at 51ft, this is probably the longest reach in the South Level
 Photos: Eddy Edwards, Apr 2012

Plant & Machinery

TThe IDB have some impressive equipment for maintaining their 193 miles of drains spread over 30,000 acres (2003 data, source: ref 3 in table above).
Wheeled excavators
Photo: Eddy Edwards, Apr 2012
A pair of wheeled excavators
The nearest is a 2001-ish German built O&K MH4,5 Cityline, weighing in at about 13.5 tons, with a 9.4m reach.
The yellow one is newer, a British JCB JS145W with monoboom and front dozer blade fitted, weighing about 14.5 tons and probably an 8.5m reach
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JCB loadall
Photo: Eddy Edwards, Dec 2012
1998? JCB 530-70 Loadall
here fitted with lifting forks on front.

JCB loadall
Photo: Eddy Edwards, July 2013
Tractors large and small.
Case CVX150 (early 2000s?) with rear attachment
and a Husqvarma ride-on mower

December 2012 emergency actions

Very heavy rainfall in the UK during Oct-Dec 2012 resulted in waterlogged fields and potential flooding over much of the country.

In the South Bedford Level where much of the land is below mean sea level, the drainage authorities faced difficult times. At this pumping station auxilliary pumps were brought in just before Christmas and the old Ruston was also used to help kep the IDB system drained.

I am very grateful to two site visitors for advising me of this:

On 26th Dec 2012 Tony Mitchell of Pymoor e-mailed
"the 'redundant' diesel engine was used to lower the level in the pound by over a metre when despite the use of auxiliary pumps (necessitating the closure of the road for their output hoses) the drain levels were increasing - in view of the frequency of power cuts in the pymoor area and the impracticallity of providing generator capacity to power the electric pumps it is important to the whole of the South Bedford Level for the Ruston diesel to be maintained in a state of readiness (which apparently it was not - someone had to be asked to get it running)."

 There's a video on You Tube of the same age and model of engine which says it is turbo charged and air-started. You can see it running here

auxilliary pumps Dec 2012
Auxillary pumping, Dec 2012
Photo: Richard Humphrey, Dec '12
On 27th Dec 2012, Richard Humphrey e-mailed attaching a link to one of his Geograph postings (see left):
"Are these additional pumps to cope with the volume of water or do they have a breakdown/maintenance situation ?"
When I visited the site on the afternoon of 28th Dec, the hoses had been moved off the road but two Sykes diesel pumps and a fuel bowser were still in position and the hoses ready for re-connection.  The  pumps looked like the Wispaset 150 model, a slienced pump capable of pumping 324m2/hr.

The only people on site then were two maintenance men checking the operation of the weed-grab, so as yet I have no answers to the comments above. If anyone has, I would appreciate an e-mail.

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auxilliary pumps Dec 2012
Auxillary pumps, Dec 2012
Photo: Eddy Edwards, Dec '12

  July 2013 update to December 2012 problems.
Tony Mitchell and Richard Humphrey raised a number of questions above about the problems in late December 2012.

At the Hundred Foot, the situation was exacerbate because one of the electric pumps was away for repair, reducing pumping capacity  to 200 tons/ minute.
are contained in the minutes of the IDB's meetings in February and May 2013. To summarise, in my words,:
  • December 2012. One of the three electric pumps was away for repair (reducing electric pumping output to 200 tons/minute)
  • 19th-20th, heavy rain, 25.3mm (1 inch) in 2 days
  • 21st, attempts made to start the Ruston but pump could not be primed. Temporary pumping equipment sought.
  • 22nd, more heavy rain 16mm (0.6 inch). Two 6-inch portable pumps deployed
  • 23rd, Gary Miller, an ex-employee of the Board, attended site (having been contacted the previous day) to assist with starting the Ruston. Now, Gary knows a thing or two about the Ruston and its pump. Not only did he work on both, he was born and bred next door, his father Donald being the Engine Driver for more than 20 years (see photo right). Some issues were found with engine and pump, but further investigations found the intake channel was badly silted.
  • 24th, am, channel desilted (with help including some Board members)
  • 24th, at 1700hrs the Ruston was started and ran for 3 hrs (pumping at the same capacity as the two working electric pumps together). Levels reduced by over a metre.
  • 27th Dec Portable pumps switched off.

Reading between the lines, I think the Board were somewhat concerned about the circumstances have learned lessons and will implement procedures to reduce future problems.
list of Engine drivers
List of Engine Drivers displayed in the Station.
Photo: Eddy Edwards, July '13
Text and photos except where noted © Eddy Edwards, 2010-12

If you think there are any errors or ommissions on this page or would like to comment, please
e-mail me
and your response will be added.

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Related pages on this website
Pumping Stations Index
Related external websites
Littleport & Downham IDB
Prickwillow steam eng. museum