Tunnel de Kervoaguel
MonumentHidden Treasure
Tunnel de Kervoaguel, located in Paule (Département 22), is a medieval landmark built in the Middle Ages. The monument is currently closed to visitors.
Key facts
- Type
- autre
- Period
- Medieval (11th-15th century)
- Location
- Paule, Département 22, Bretagne
- Visit
- Closed to visitors
- Mérimée Reference
- PA22000020
Carved out of Breton granite, the Kervoaguel tunnel at Paule is a discreet but striking example of hydraulic and railway engineering in the interior of the Côtes-d'Armor, nestling in a landscape of moors and deep forests.
History
Nestling in the commune of Paule, in the heart of Central Brittany, the Kervoaguel tunnel is one of those underground infrastructures that are often described as invisible, even though they have a profound effect on the landscape. Crossing the rolling hills typical of the Armorican Massif, the tunnel is set in a landscape of dense hedged farmland, steep-sided streams and beech and chestnut forests that characterise the Carhaix region. What makes the Kervoaguel tunnel so special is precisely the fact that it is set in a sparsely built-up area, where every technical intervention on the bedrock required considerable effort. The Armorican granite, hard and massive, imposes severe constraints on digging, giving this structure real technical value. The walls carved out of the rock reveal, for those who stop to observe the details, the traces of the patient work of the quarrymen and miners who shaped it. The visitor experience is that of a discreet industrial or hydraulic heritage, far from the major tourist monuments, but charged with a rare authenticity. The gradual darkness at the entrance to the workings, the change in acoustics, the constant coolness of the rock walls - these are all sensations that plunge visitors into the intimacy of the Breton underground. The immediate surroundings often offer beautiful walks along old routes, lanes or railways, depending on the nature of the infrastructure. The surrounding natural environment is itself a major attraction. Paule and the surrounding area are home to dense vegetation, wetlands and a discreet fauna, making the site a popular destination for lovers of hiking and local history. Against this backdrop, the tunnel provides an ideal opportunity to explore the deeper recesses of Central Brittany, far from the beaten track but with an unsuspected wealth of heritage.
Architecture
The Kervoaguel tunnel is an underground structure dug into the Armorican granite, the dominant rock in the subsoil of Central Brittany. The probable cross-section is a barrel vault, the classic form of 19th-century hydraulic or railway tunnels, whose arched geometry ensures optimum distribution of the loads exerted by the surrounding rock. The internal facings, partly cut directly into the rock mass or reinforced with granite rubble, have the characteristic bluish-grey colour of the granites of Finistère and Côtes-d'Armor. The entrance and exit gates are generally the most elaborate elements of this type of structure: ashlar frames, semi-circular or slightly pointed arches, sometimes adorned with a simple moulded entablature or an engraved inscription indicating the date of construction or the builder. These portals, exposed to the Atlantic weather, often bear traces of abundant musk vegetation - mosses, golden lichens - which accentuate the romantic aspect of the whole. The length of the tunnel, which is difficult to assess without a precise survey, is probably in the range of a few dozen to a few hundred metres, typical of small local service tunnels. Tunnelling techniques in the 19th century were based on manual work using black powder, then dynamite, and required specialised labour, often from the mountainous regions of France.
Related Figures
Ingénieurs des Ponts et Chaussées du département des Côtes-du-Nord (XIXe siècle)Ouvriers carriers et mineurs spécialisés dans le percement des tunnels armoricainsResponsables du Réseau Breton (compagnie ferroviaire à voie métrique, fin XIXe siècle)Administrateurs du canal de Nantes à Brest (XIXe siècle)Édiles et conseillers généraux de Paule ayant soutenu les projets d'infrastructure locale
Map
Coordinates not available for this monument.
Tags
Frequently Asked Questions
Where is Tunnel de Kervoaguel located?
Tunnel de Kervoaguel is located in Paule, Département 22 department, Bretagne region, France.
When was Tunnel de Kervoaguel built?
Tunnel de Kervoaguel dates back to a period built in the Middle Ages (11th-15th century).
Is Tunnel de Kervoaguel open to visitors?
Tunnel de Kervoaguel is currently closed to visitors.