The Canal des Deux Mers, also known as the Givors Canal, is the vestige of an epic river link between France’s two largest rivers, the Loire and the Rhône. A look back at this work of art, which combines a challenge to nature with economic ambition.

Once upon a time, the Givors canal

In the heart of France, woven into the landscape like an ancient vein whose pulsations tell the story of a nascent industrial revolution, lies the Givors canal. It’s a story of genius, perseverance and a vision that has shaped the destiny of a region. Let yourself be carried away by the story of this forgotten marvel, where every lock, every bridge, whispers echoes of a past where man and nature clashed and worked together to forge a future now synonymous with the past.

The beginnings of a revolution

Imagine 17th-century France, a time when roads were little more than muddy paths and capricious rivers dictated the laws of river trade. It was against this backdrop that the bold idea of a canal at Givors was born, envisaged as a challenge to nature itself, promising to link the wild rivers of France, the Loire and the Rhône.

François Zacharie, Architect of a Dream

In the midst of these grandiose aspirations, one man, François Zacharie, stood out. A visionary, he saw beyond the mountains and valleys, imagining a canal that would link people and facilitate their exchanges. In 1779, armed only with his will (and some ingenious plans), Zacharie set about turning his dream into reality. Work began, marking the landscape with the indelible imprint of human ambition.

A structure against all odds in the heart of the Massif Central

The years that followed were a constant ballet of men and machines battling the elements. Anecdotes abound of the challenges encountered: knee-deep mud, unexpected floods, impassable rocks. And yet, against all the odds, the canal takes shape, winding through the landscape like a writer’s pen across a blank page.

The golden age of coal

Inaugurated with great fanfare, the canal quickly became the vital artery for coal transport. Loaded boats glided along its calm waters, carrying the fuel for an industrial revolution. Givors and the surrounding area were buzzing with activity, the canal the beating heart of a transformed region.

The twilight of a giant

But the stars that shine brightest are often the ones that fade fastest. With the advent of the railways and their excessive fares, the canal, once the royal road of trade, began to feel the weight of time and competition. Slowly, boatmen and merchants turned to new horizons, leaving the canal to sink into a gentle obsolescence, before being definitively covered by a motorway in the last century.

Renaissance and remembrance

Nevertheless, the history of the Givors canal does not end in oblivion. Recognising its historical and cultural value, initiatives have been launched to preserve this silent witness to a bygone era. Today, the Givors canal is more than just a waterway; it’s an open book on the past, inviting the curious to delve into the stories of those who shaped our world.

The Givors Canal, with its rusty locks and tranquil banks, continues to tell its story. A story of dreams, challenges and innovation. As the world moves on, it remains there, a monument to human perseverance, reminding all those who pass by that even the boldest endeavours begin with a simple dream.

The Couzon dam, built to supply the canal / Wikimedia

A canal between the Loire and the Rhône

At the heart of French industrial history, the Givors canal, designed and built in the 18th century, stands as a remarkable testament to human ingenuity and determination in the face of the challenges of nature and economic development. This waterway, now almost forgotten in the industrial landscape, nevertheless played a crucial role in the transport of goods, particularly coal, contributing to the industrial development of the Rhône-Alpes region and beyond.

Genesis and construction

The origins of the Givors canal lie in the need to improve navigation conditions on the Rhône and its tributaries, particularly for transporting coal from the Saint-Étienne region to Lyon and other markets.

François Zacharie, a visionary engineer, himself a merchant, and a central figure in this project, conceptualised the canal in response to these logistical needs. In the first half of the 18th century, he realised the importance of creating a waterway capable of bypassing the Massif-Central, marking the start of an ambitious project that was to transform the region.

Work began in 1761 under his impetus, against a backdrop of technical innovation and strong economic ambitions. The Givors canal was conceived as a major engineering feat, capable of facilitating the transport of natural resources essential to the emerging industry. Its construction required years of hard work, involving the creation of several locks, bridges and aqueducts to overcome natural geographical obstacles.

Economic and social impact

The completion of the canal by his son, after several decades of work following the ruin and death of its instigator, marked a revolution in regional transport and trade. It provided an efficient link between the Saint-Étienne coalfields and the city of Lyon, and beyond to the Mediterranean. This waterway made a significant contribution to the region’s economic development, facilitating the export of coal and stimulating the development of local industries such as metallurgy and silk.

In addition to its economic impact, the Givors canal also played an important social role. It created many jobs, not only during its construction but also afterwards, in the management of navigation and infrastructure maintenance. This major project contributed to the development of local communities, offering them new economic opportunities and transforming the social landscape of the region.

Decline and legacy

With the advent of the railways in the 19th century, the importance of the Givors canal began to decline. The transport capacity and speed offered by rail gradually made the traditional waterways obsolete for transporting heavy and bulky goods. Despite this decline, the Givors Canal remains a feat of engineering and an important part of France’s industrial heritage.

Today, although its original function as a navigable waterway for transporting goods is a thing of the past, the Givors Canal continues to inspire through its history and architecture. It is a remarkable example of human ingenuity in the face of geographical and economic challenges. The remains of the canal, as well as the stories of its construction and use, continue to fascinate historians, engineers and the general public, testifying to the importance of waterways in the economic and social development of societies.

The Rocher Percé lock, a listed vestige of the Givors canal / Wikimedia

Chronology of the Givors canal

To develop a detailed chronological plan based on the contents of the document “October 2012 – Historical overview of the Givors canal”, I will extract and organise the key dates and events mentioned. This plan will serve to structure the important historical facts relating to the design, construction, and evolution of the Givors Canal, highlighting the pivotal moments that have marked its history.

The canal of two seas through the centuries

  • 17-18th century, prelude to the Project
    First thoughts on the need to improve navigation on the Rhône.
    Emergence of the first engineering projects to facilitate river transport.
    Beginnings of the feasibility study for a canal to bypass the difficulties of the Rhône.
    Presentation of the first detailed plans for the construction of the canal.
  • Late 18th century, construction of the canal
    Official launch of work on the canal under the direction of François Zacharie.
    A period of technical and financial challenges, accompanied by significant advances in construction.
    Innovative solutions implemented to overcome geographical obstacles.
    His son, Guillaume Zacharie, continues to direct the work.
    Completion of key sections of the canal, enabling the first navigation trial.
    Official inauguration of the canal and start of its operation for the transport of goods.
    Expansion of use of the canal, becoming a major route for transporting coal.
  • 19th century, heyday and decline
    The canal reaches full operational capacity, playing a crucial role in the regional economy.
    The canal’s heyday, essential for industrial development and transport.
    Introduction of the railway, marking the beginning of the decline in the canal’s importance.
    Significant reductions in the use of the canal in the face of competition from the railways.
  • 20th century, the end of the canal and heritage recognition

The Givors canal is now mainly used for local and specific purposes.
Work and filling in of most of the canal for the A47 motorway.
Recognition of the canal as an important industrial and historical heritage site.
Initiatives to preserve and enhance the canal, reflecting its cultural importance.

Resources linked to the Givors canal

  • Construction of the Givors canal, Agnès de Zolt, Archives départementales
  • Le Rocher percé, the last vestige of the canal, Le Progrès
  • Map of the railway project to extend the canal, Gallica
  • The Givors canal, BNF research
  • François Zacharie and the beginnings of the canal, Givors from one century to the next
  • The Givors canal, history of rivers and canals
  • The epic of the Givors canal , the remains , Chantal Goirand
  • Nearly 200 years ago, man linked the Loire to the Rhône, France 3
  • Between the Rhône and the Loire, the Canal des Deux Mers
  • An unfinished dream, Usine des Eaux conference
  • Map and route of the canal, Garbougnat
  • The canal, Wikipedia


  • Canal, river and navigation
Activities, leisure, Rhone River
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Activities, visits, tickets, leisure