Lymm Dam is the name of a lake in Lymm

Lymm

Lymm is a large village and civil parish within the Warrington borough of Cheshire, in North West England. Lymm was an urban district of Cheshire from 1894 to 1974. The civil parish of Lymm incorporates the hamlets of Booths Hill, Broomedge, Church Green, Deansgreen, Heatley, Heatley Heath, Little...

, Cheshire

Cheshire

Cheshire is a ceremonial county in North West England. Cheshire's county town is the city of Chester, although its largest town is Warrington. Other major towns include Widnes, Congleton, Crewe, Ellesmere Port, Runcorn, Macclesfield, Winsford, Northwich, and Wilmslow...

, England, situated in the greenbelt buffer between the nearby towns of Warrington

Warrington

Warrington is a town, borough and unitary authority area of Cheshire, England. It stands on the banks of the River Mersey, which is tidal to the west of the weir at Howley. It lies 16 miles east of Liverpool, 19 miles west of Manchester and 8 miles south of St Helens...

 and Altrincham

Altrincham

Altrincham is a market town within the Metropolitan Borough of Trafford, in Greater Manchester, England. It lies on flat ground south of the River Mersey about southwest of Manchester city centre, south-southwest of Sale and east of Warrington...

. It was created in 1824 by a dam

Dam

A dam is a barrier that impounds water or underground streams. Dams generally serve the primary purpose of retaining water, while other structures such as floodgates or levees are used to manage or prevent water flow into specific land regions. Hydropower and pumped-storage hydroelectricity are...

 built during the construction of what is now the A56 road

A56 road

The A56 is a road in England which extends between the city of Chester in Cheshire and the village of Broughton in North Yorkshire. The road contains a mixture of single and dual carriageway sections, and traverses environments as diverse as the dense urban sprawl of inner city Manchester and the...

, when local inhabitants objected to initial plans for a route through the village centre. It may have been used to supply power to local industry, and the surrounding area.