A section of wooden water pipe used in Witchita, Kansas. Wood pipe similar to this was used for waterlines, sewer pipes, irrigation, electrical conduit and, even natural gas pipe worldwide. 400 miles of elm log-pipe, buried in London in 1613, was unearthed in 1930 and found to be in perfectly sound condition. Philadelphia, New York City, Boston and many other cities employed wood pipe; Detroit had 22 miles of it. Some wood pipe is still in use in outlying areas of the US.