This site was established in 1980; 10.5ha, managed by the Y.W.T.; located 2km east of Wombwell.
The reserve is one of many subsidence 'flashes' which were created, mainly between 1950 and 1965, contagious with the largely industrialised Dearne Valley.

This seemingly uninteresting site comprising about 4ha of open water with little marginal vegetation, surrounded by 6.5ha of grazed pasture, attracts a prolific variety of bird life. Notable are the waders which migrate along the Dearne Valley, but large numbers of waterfowl also collect, mainly in winter.

The rich fish life contributes considerably to the presence of many bird species. Herons are usually present, whilst Great Crested Grebe, Red Breasted Merganser and Goosander are just some of the species which are regularly attracted by the fish stocks.

The pastures around the Flash are very attractive to large numbers of passing Golden Plovers and Lapwing, the latter species also breeding, alongside Redshank and Snipe.