Whittlesey Mere

Whittlesea Mere was an area of open water in the Fenland area of the county of Huntingdonshire (now Cambridgeshire), England. The mere occupied the land southeast of Yaxley Fen, south of Farcet Fen and north of Holme Fen. The town of Whittlesey lay to the northeast.

Whittlesea Mere was the last of the 'great meres' to be drained. The old course of the River Nene took it into the mere on one side and out on the other. The area covered by water was at least 1,870 acres (756 hectares) in summer, extending to 3,000 acres (1,214 ha) in winter. The mere was a source of fish, wildfowl, reed and sedge for local inhabitants, and also provided a setting for 'water picnics' for the region's nobility.

According to the traveller Celia Fiennes, who saw it in 1697, the mere was "3 mile broad and six mile long. In the midst is a little island where a great store of Wildfowle breed.... The ground is all wett and marshy but there are severall little Channells runs into it which by boats people go up to this place; when you enter the mouth of the Mer it looks formidable and its often very dangerous by reason of sudden winds that will rise like Hurricanes...."

Before drainage, the fens contained many shallow lakes, of which Whittlesey Mere was the largest. The River Nene originally flowed through this mere, then south to Ugg Mere, before turning east towards the Ouse. By 1851, silting and peat expansion had reduced Whittlesey Mere to about 400 ha and only a metre deep.

The construction of a new main drain of the Middle Level Navigations to Wiggenhall St Germans completed in 1848, enabled the mere to be drained. A pumping station with an Appold centrifugal pump was used to achieve this, rather than the more traditional scoop wheel. The pump had been shown for the first time at the Great Exhibition in 1851 and its inventor was commissioned to design a pump for the draining of the mere. It was 4.5 feet (1.4 m) in diameter, and powered by a 25 hp (19 kW) steam engine, could raise 101 tons of water per minute by 2 or 3 feet (0.6 or 0.9 m).

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