Rigole de la plaine
Encyclopedia
The critical feature of the Canal du Midi
Canal du Midi
The is a long canal in Southern France . The canal connects the Garonne River to the on the Mediterranean and along with the Canal de Garonne forms the Canal des Deux Mers joining the Atlantic to the Mediterranean. The canal runs from the city of Toulouse down to the Étang de Thau...

 was to provide sufficient water to ensure that the lock system continued to function, even through the summer months. The first part of this endeavor was the rigole de la plaine . It carried water from the Sor River, at Pontcrouzet, to the Bassin de Naurouze
Bassin de Naurouze
The Bassin de Naurouze is an octagonal holding tank, created during the building of the Canal du Midi as designed and built by Pierre-Paul Riquet. It was abandoned a few years after construction of the canal because of its recurrent silting problems. The flow of water from the...

, where the water was to enter the canal
Canal du Midi
The is a long canal in Southern France . The canal connects the Garonne River to the on the Mediterranean and along with the Canal de Garonne forms the Canal des Deux Mers joining the Atlantic to the Mediterranean. The canal runs from the city of Toulouse down to the Étang de Thau...

. This was done in 1667.

In 1668 Riquet
Pierre-Paul Riquet
Pierre-Paul Riquet was the engineer and canal-builder responsible for the construction of the Canal du Midi.-Background:...

 built a loading basin, near Revel
Revel, Haute-Garonne
Revel is a commune in the Haute-Garonne department in southwestern France.-Location:Revel is situated about 35 miles east of Toulouse...

, on the rigole de la plaine between Pont Crouzet, on the river Sor, and Naurouze
Bassin de Naurouze
The Bassin de Naurouze is an octagonal holding tank, created during the building of the Canal du Midi as designed and built by Pierre-Paul Riquet. It was abandoned a few years after construction of the canal because of its recurrent silting problems. The flow of water from the...

, called Port Louis. The feeder between this point and Naurouze
Bassin de Naurouze
The Bassin de Naurouze is an octagonal holding tank, created during the building of the Canal du Midi as designed and built by Pierre-Paul Riquet. It was abandoned a few years after construction of the canal because of its recurrent silting problems. The flow of water from the...

 was expanded in order for boats to ferry stones. Fourteen locks were put in place.

In 1669 Riquet
Pierre-Paul Riquet
Pierre-Paul Riquet was the engineer and canal-builder responsible for the construction of the Canal du Midi.-Background:...

 widened the rigole de la plaine enough to support navigation. It was opened to traffic in 1670 from Revel
Revel, Haute-Garonne
Revel is a commune in the Haute-Garonne department in southwestern France.-Location:Revel is situated about 35 miles east of Toulouse...

, to Naurouze
Bassin de Naurouze
The Bassin de Naurouze is an octagonal holding tank, created during the building of the Canal du Midi as designed and built by Pierre-Paul Riquet. It was abandoned a few years after construction of the canal because of its recurrent silting problems. The flow of water from the...

. Pierre Borel had the original idea for this feature.
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