Coultershaw Heritage Site and Beam Pump
About
Coultershaw is a small industrial site on the River Rother south of Petworth where an eighteenth-century water-powered beam pump still lifts water, driven by the river that has turned the wheel since 1782. The pump was installed to supplement the water supply to Petworth House and the town nearly two miles away, an ambitious piece of estate engineering for its date, and it is now a scheduled monument, restored to working order and demonstrated on open days.
The mechanism is the reason to come. A waterwheel drives a set of three cranks, which work rocking beams, which drive pumps that push water uphill through a rising main to Petworth. Everything is exposed, slow enough to follow with the eye, and loud enough to make the point that this is a machine doing real work rather than turning for show. Visitors can watch the wheel engage, the beams begin to rock and water start to move, and the volunteers explain what each element does as it happens.
The site is more than the pump. Coultershaw was a wharf on the Rother Navigation, which linked Midhurst and Petworth to the Arun and thence to the sea and to London, and the eighteenth-century canal basin, lock remains, warehouses and stables survive around the mill pond. There is a fish ladder, a family nature trail through the riverside land, and a twenty-first-century Archimedes screw turbine generating electricity from the same head of water that drove the pump - a deliberate pairing of two technologies two centuries apart.
Admission is free, the site is run entirely by volunteers, and opening is limited to Sundays and special event days between early April and mid-September. Wheelchair access covers most areas including the waterwheel viewing, though the riverside paths are uneven and can be muddy. Dogs are welcome, parking is on site, and Petworth House is a short drive away.
Categories:
Plan Your Visit
⏱️ Recommended Visit Duration
💡 Visitor Tips
- The site opens Sundays and special event days only, from early April to mid-September - check the date before travelling.
- Time your arrival for when the pump is running; the machinery in motion is the whole point of the visit.
- Admission and the family nature trail are free, and there is free parking on site.
- Riverside paths are uneven and get muddy - boots or sturdy shoes are sensible even in summer.
- Wheelchair users can reach most of the site including the waterwheel viewing point; accessible toilets are provided.
- Dogs are welcome, which makes this a good stop on a Rother valley walk.
- Ask about the Archimedes screw - the contrast between it and the 1782 pump is the best thing here.
- Combine with Petworth House and the town, both about ten minutes away by car.
Highlights
The 1782 beam pump at work
The pump is the reason the site is a scheduled monument and the reason to time a visit for an open day. Water from the Rother turns a large wheel, which drives three cranks, which rock the beams, which work the pumps that push water up a rising main towards Petworth nearly two miles away. Every part of that chain is visible and slow enough to follow, and the machine's rhythm - the wheel's steady turn, the beams alternating, the surge in the pipes - makes the engineering immediately legible in a way no diagram achieves.
Volunteers start it during open hours and explain each stage as it moves.
Supplying Petworth House and town
The pump exists because Petworth needed more water than its own sources provided, and the estate was prepared to engineer a solution nearly two miles from the house. Installed in 1782, the system supplemented supply to Petworth House and the town, and it continued to serve that purpose long after more modern alternatives existed.
The interpretation sets out what an eighteenth-century water supply actually involved - head, distance, pipe materials, leakage, the constant maintenance - and makes clear that this was infrastructure rather than ornament, built by an estate acting as its own water authority.
The Archimedes screw turbine
Alongside the eighteenth-century pump the site now runs a twenty-first-century Archimedes screw turbine, generating electricity from the same fall of water that has driven the wheel since 1782. The pairing is the most quietly effective thing at Coultershaw: two machines, two centuries apart, extracting useful work from an identical resource, with the modern one funding the care of the old.
Visitors can see the screw turning and the output being metered, and the volunteers use it to open a conversation about small-scale hydro power, river ecology and what a weir does to a catchment.
The Rother Navigation wharf
Coultershaw was a working wharf on the Rother Navigation, the canalised river that connected Midhurst and Petworth to the Arun and so to the coast and London. The eighteenth-century canal basin survives, with the remains of a lock, warehouses and stables around it, and the site plan still reads as a transhipment point where goods moved between barge and cart.
Interpretation covers the trade the navigation carried - timber, corn, coal, chalk and manufactured goods - and its decline once the railway reached the area, which is why the basin is a monument rather than a working wharf.
Collections
Coultershaw is a preserved industrial site rather than a display collection: a scheduled monument comprising the waterwheel-driven beam pump of 1782 that supplied Petworth House and town, restored to working order and demonstrated on open days, together with the Engine House and its hand pumps, the eighteenth-century canal basin of the Rother Navigation with the remains of its lock, warehouses and stables, a fish ladder at the weir, and a modern Archimedes screw turbine generating electricity from the same head of water.
Riverside land carries a free family nature trail. Interpretation is delivered largely in person by the volunteers of the Coultershaw Trust, who restored and maintain the machinery.
The Beam Pump
The 1782 waterwheel, cranks, beams and pumps that lifted water towards Petworth, demonstrated in operation.
The Wharf and the Navigation
The canal basin, lock remains, warehouses and stables of the Rother Navigation, and the trade they served.
Water Power Then and Now
The Archimedes screw turbine, the fish ladder, and the modern use of an eighteenth-century head of water.
Themes
Time Periods
Current Exhibitions
No current exhibitions. Please check the museum website for updates.