Found this on the BC website and though it of interest here:
"Archaeologists have discovered a 2,000-year-old water main built by the Romans - which is still working.
The find has amazed experts at the Vindolanda Roman fort in Northumberland.
During ongoing excavations at the site, workers discovered a 100ft stretch of wooden mains, which at one time fed the fort with water from nearby springs.
The pipes were constructed by drilling large lengths of alder, which were joined together by oak pegs."
http://news.bbc.co.uk/1/hi/england/tyne/3464861.stm
"Archaeologists have discovered a 2,000-year-old water main built by the Romans - which is still working.
The find has amazed experts at the Vindolanda Roman fort in Northumberland.
During ongoing excavations at the site, workers discovered a 100ft stretch of wooden mains, which at one time fed the fort with water from nearby springs.
The pipes were constructed by drilling large lengths of alder, which were joined together by oak pegs."
http://news.bbc.co.uk/1/hi/england/tyne/3464861.stm