Turton and Entwistle Reservoir

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Turton and Entwistle Reservoir, situated in the picturesque village of Edgworth, Lancashire, England, is a fantastic tourist attraction that is perfect for taking leisurely strolls and enjoying the great outdoors. The reservoir was created in 1832 with the construction of the impressive Entwistle Dam, which at the time was the highest dam in Britain, towering 108 feet from its base.

Designed by Thomas Ashworth, a local land surveyor, under the supervision of Jesse Hartley, the esteemed engineer of Liverpool Docks, the Entwistle Dam was built to regulate the water supply of Bradshaw Brook, catering to the water power needs of the local textile mills. Joseph Jackson, an engineer and surveyor from Bolton, also played a role in its construction.

The reservoir itself holds around 750 thousand imperial gallons (approximately 3,400,000 litres) of water and, when combined with the nearby Wayoh Reservoir, it satisfies nearly 50% of Bolton’s drinking water requirements. It serves as a crucial water source for the region.

Constructed primarily using puddle clay, the dam lacks a distinct core and the typical waterproof cutoff found in earth dams. Interestingly, the reservoir features a rock-cut outlet tunnel that passes through the valley side, as well as a siphon draw-off pipe, adding to its unique engineering characteristics.

Over time, the Bolton Corporation Water Works assumed control of the reservoir in 1864 and made several additions, including the overflow channel and valve tower that still stand today.

For visitors seeking leisurely walks and a serene environment, Turton and Entwistle Reservoir provides an ideal setting. Its picturesque surroundings, tranquil waters, and the charm of the village of Edgworth offer a delightful escape from the hustle and bustle of everyday life. Exploring the reservoir’s scenic trails and admiring the architectural marvel of the Entwistle Dam promises a pleasurable and rejuvenating experience for nature enthusiasts and history buffs alike.

This trail is a great outing. A few things to bear in mind first. There is limited parking available at the trailhead, also fairly narrow driving to it so a better option may be parking along the road and taking one of the paths down to the reservoir to join the trail. A good, flat walk around the reservoir. Brilliant for all the family!