hi don. i went round the powder mills before they started demolishing it and found some facinating things. apart from the canals they had fairly small buildings with a roof designed so that an explosion would go upwards.for minimum damage. i used to go out with a girl from government row which ran parellel to the river lee and when i was smaller (during the war) started a steam crane (used in the gravel pits) when the driver left it while having his lunch in the greyhound pub, and it ended up in the pits