Wood pipes from Roman aqueduct found in Lyon

An archaeological survey in advance of real estate development in the Point du Jour area of Lyon has unearthed double wooden pipes from the ancient Roman Yzeron aqueduct. The excavation in the 5th arrondissement, Lyon’s westernmost neighborhood where the Roman city of Lugdunum was founded in 43 B.C., revealed the remains of two parallel pipes installed at the bottom of a ditch more than nine feet deep and more than 13 feet wide at its opening. The wooden pipes were broken by modern construction, but the surviving sections add up to a total length of 80 feet.

The conduits were made from large oak trunks. The trunks were hollowed out creating a trapezoidal void six inches in diameter. This would have allowed a large volume of water to pass through. The pipes were installed on a slight slope from west to east into the city. They were encased in clay to make them as watertight as possible. Once the pipes were installed, the ditch was backfilled to pack them in safely.

Archaeologists found a coin from the Augustan era in the backfill, and radiocarbon and dendrochronological dating of samples taken from the pipes all confirm that the conduits were installed at the beginning of the 1st century. The date, west-east orientation and the route the pipes take identify then as part of the Yzeron aqueduct.

The aqueduct carried water from a basin of the Yzeron river about 12 miles southwest to the ancient city of Lugdunum, modern-day Lyon. Begun around 9 B.C. in the reign of Augustus, it was the second of four aqueducts built by the Romans to supply Lyon’s water needs. The Point du Jour pipes may have been a provisional route into the city, or a diversion off the main canal or even a test run/prototype.

Whatever their purpose, the conduits didn’t serve long. A massive masonry stack nine feet square with more than five feet of its height extant was built in the filling of the ditch right smack on top of the double wooden pipes, destroying them. Archaeologists believe the masonry pile is the base of a pile of the BrĂ©venne aqueduct whose remains have been found on both sides of the excavation. The BrĂ©venne piers were built in this area in the middle of the 1st century.

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7 Comments »

Comment by Trevor
2021-01-27 03:29:42

I wonder if they had people complaining that this modern new aqueduct was an eyesore, and the water not as good from the traditional wooden pipes. :lol:

 
Comment by Loretta
2021-01-27 04:14:49

Where genuine Roman “plumbum” replaced the traditional wooden pipes, they might have had a point (due to lead poisoning!) :yes:

———
PS: Notably, in this context a prepared statement on behalf of the “Movement”:

“Irrigation could otherwise indeed be interpreted as a real landmark in the continuing struggle to liberate the parent land from the hands of certain imperialist aggressors, excluding and not excluding those concerned with drainage, medicine, roads, housing, education, viniculture and any person contributing to the welfare of Gauls of both sexes and hermaphrodites.”

 
Comment by Jim
2021-01-27 05:23:21

I am wondering about the geometry of a trapezoid with a 6″-diameter…how it was bored…

 
Comment by norm
2021-01-27 09:56:26

Many old industrial cities in the northern United States still have sections of wood, water and gas pipes.

 
Comment by Matt
2021-01-28 18:29:54

Obviously milled boards, and assembled.

 
Comment by Jeff Henion
2021-01-28 23:22:52

One of my employers operated on the site of an old vinegar plant. There was a good deal of wooden piping buried around the site because it wouldn’t react with the acidic vinegar and impart a bad color or taste. This stuff was built from polygonal boards assembled into a hexagonal pipe which was then wrapped in cloth and coated in tar.

 
Comment by JoAnn
2021-01-29 18:48:37

Exactly! I recall years ago that a local paper had pictures of wooden water pipes that were still in use in Hartford, Conn.

 
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