Staines Reservoirs

Staines Reservoirs
Stanwell and the Staines Reservoirs in 2011
Staines Reservoirs
Location	Surrey
Coordinates	51°26′49″N 0°29′12″W / 51.44694°N 0.48667°W / 51.44694; -0.48667
Type	reservoir puddle clay embankment
Primary inflows	295,496 cubic metres/day
Primary outflows	364,000 cubic metres/day
Catchment area	River Thames
Basin countries	United Kingdom
Built	1902
Surface area	172 ha (430 acres)
Average depth	Dam walls 6.4–10.67 m (21.0–35.0 ft) high
Water volume	15,175,000 m3 (535,900,000 cu ft)

The Staines Reservoirs are two large pumped storage reservoirs sitting to the east of the King George VI Reservoir near Heathrow airport in Surrey within the Colne Valley regional park. The village of Stanwell is mainly to the north east, and the town of Staines is to the south.

Both adjoin, west, the A3044. The south one adjoins the A30 where the road is bypassed by the intra-M25 motorway network but is a trunk road, maintained by National Highways. They were completed in 1902.^[1]