Grain Fort - Isle of Grain - 2011
Undertook this visit on the way back from Harold Wood Hospital Morgue. After and hour of searching I found what looked like a badger set, I tried with all my might to get in, but a little voice in my head said that I would never get back out. Dejected I had one last look around, and found another set like hole, this one I made it through, I was greeted with 3 tunnels in a shape of a "Y", 2 of which were very long, unfortunately all ends blocked up.
I shall return again to try the other entrance, but will take someone who can assist. Keep em peeled.
The Isle of Grain has long been of strategic importance for safeguarding the entrance to the River Medway and the 1860 Royal Commission called for a casemated fort around the existing Grain Tower. However this did not proceed and Grain Fort was constructed as a separate site.
The fort began as a large heptagonal earthwork surrounding a large semi-circular keep. At the front of the fort was a ditch defended by four caponiers. Another inner ditch surrounded the keep and was defended by three caponiers and two demi-caponiers.
As with other forts of the time the upper gun emplacements were connected to the magazines below via shafts. Passages connected the magazines to the caponiers in the front ditch and the keep, which was also accessible via a bridge from the terreplein. The men garrisoned at Grain Fort were barracked in the keep.
Modifications to the fort were made at the end of the 19th century with the addition of four guns with further alterations in the following years through to the end of the Second World War. Grain Fort remained in service until the disbandment of coastal artillery in 1956. The site was sold in 1961 with the subsequent demolition of the fort and other major features and the ditches were filled with rubbish.
Taken from - http://www.undergroundkent.co.uk/grain_fort.htm