TriciaK,
I have not heard of planz like zat !
However here's some stats of Blyth coal leaving the harbour.
Exported coal broke thru the million tons mark in 1888.
1937= 6.6 million tons. 1938= 5.8, 1939= 5.8, 1940= 4.1
1941= 3.9, 1942= 3.9, 1943= 3.5.
In 1961 Blyth exported 6,889,317 tons. Blyth ( and Europe's)
highest ever total. It went downhill thereafter through efforts
of UK government policy decisions !
Plans to block the harbour for whatever reasons would have
had a major impact on the value of Blyth's commerce.
Michael