In The Wash, a squarish estuary
on the East coast of England, where Norfolk meets Lincolnshire, there is a strange
island, flawlessly circular, with a dimple in the middle similar to a huge
doughnut. This doughnut famously recognized as the “Outer Trial Bank”. This is
one of two islands built during the 1970s to study the feasibility of
converting the entire estuary into a fresh water reservoir. The other trial
bank, built before the Outer Trial Bank, is connected to Norfolk by a causeway
on Terrington Marsh.
The island is composed of dredged
sand and braced by limestone gabions, or cages filled with rocks, and have a
2.5-acre central reservoir. It’s rarely included on maps even though it stands
out as one of the highest points on the otherwise flat, marshy coast of the
Wash. It seems various people are inquisitive to what these structures are? What
this peculiar structure is out in the Wash - whether a meteor's landed in the
Wash or aliens have landed or something! The numerous thoughts come in mind. The
concept of constructed Outer Trial Bank was to build a tidal barrage across
half of the Wash to capture freshwater from rivers flowing into the estuary. However,
the plan was failed hugely because the banks were built using mud dredged from
the salt marsh, which was saline anyway. This is salinated the stored fresh
water.
Moreover, the plan was shelved
but not after £3 million were spent in unsuccessful. There’re no systematized
tours or trips to the island, but you can see online videos which will reveal
that it can be reached by some experienced kayakers with knowledge of the tidal
conditions in The Wash. They're very significant as they're major landforms in
the area. They're the only hills in the Wash. Now these artificial islands have
gained novel importance as a breeding bird colony, with around more than 3,000 pairs
of sea birds using it as their nest. They're declining in a lot of their
breeding habitats but here they're doing very well.