Tarragona (Spain)

Roman aqueducts: Tarragona (SPain) Tarragona - TARRACO
For the photo's, see below
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Tarraco (Tarragona) had at least two aqueducts, one with its source in the Rio Gayá, NE of the city, and the other with its source in the Rio Francolí, to the north. A third aqueduct may have carried water to the port area, but is only cited by a source in the 16th century and further poorly known. Water was needed not only for the city, the capital of Hispania Tarraconensis, but also for the numerous ships that visited the harbour. The Gayá and Francolí aqueducts served the higher parts of the city with its monumental provincial forum, which lies on a hill to the east of the port area.

The Gayá aqueduct had its water intake point probably close to Pont d'Armentera in the Gayá river northeast of Tarraco, and in that case was the longest roman aqueduct of Tarraco (Pont d'Armentera lies 7 km east of exit 10 on the motorway A2 from Barcelona to Lleida). It is mostly underground and lacks spectacular features. It was renovated in the 18th century by Joan Antonio Rovira on orders of Archbishop Santiyán and was repaired many times since then. As a result, most traces of the roman channel have been destroyed, but some remains can be seen close to the ruins of the 18th century aqueduct along the Calle Rovira i Virgili and also along the road that leads to Pont d'Armentera.

Legend
The master builder was building the bridge and a gust of wind blew it away. In despair he said that only the devil could build a bridge that would last a thousand years. So the devil appeared to him and ensured him that he would build a bridge that very night. In exchange the devil demanded the soul of the first to drink the water that went across the bridge. The first to do this was an ass (donkey) whose soul the devil kept.

From the information panel along the highway, made by Abertis Autopistas.

The Francolí aqueduct has minor remains along most of its length. In Tarragona, remains can be seen near the "Fuente de los Cuatro Algarrobos", north of the city, abouts 250 metres east of the N 240, in the Camino del Ángel at the junction with Avenida de Catalunya, and at the outer wall or Falsa Braga, where it apparently divides into sections that
Technicalities
The bridge measures 217 meters and has a maximum height of 27 meters, not counting the water gallery, now destroyed. It consists of two levels of superimposed arches, with 11 arches on the lower level and 25 on the upper level. The arches have a width (span) of 6,30 meters, a height of 5,7 meters (where they do not have to adapt to the incline of the ravine) and a width of 1,86 meters. The distance between the arches is 8 meters. The elevation of the bridge on the north side is 56,8 meters and 56,4 meters on the south side [which gave a fall of 0,4 meters and a gradient over the bridge of 0,2 %].

From the information panel along the highway, made by Abertis Autopistas.
Drawing from Leather 2002.
feeds the upper and lower city respectively. North of Tarragona, there are also remains in El Mas Blanquet, and in the del Castellot brook, 250 m upstream of the Pont del Tupino. The difference in altitude measured for these remains 1080 m apart is 4,4 m which gives a gradient of 0,4% . The source in the Rio Francoli was probably opposite the village of El Rourell at an altitude of 92 metres.

The most spectacular feature of the Francolí aqueduct is the aqueduct bridge of Ferreras, also known as the Puente del Diablo (devil's bridge) with a maximum height of 26 m and a length of 249 m, including the ends where the specus runs on a wall. It consists of two tiers of arches, all with the same diameter of 20 Roman feet (5,9m) with a variation of 15 cm. The distance between centres of the pillars is 26 Roman feet (7,95m). The present width of the specus is 2,5 roman feet, but this may have been modified by restorations in the course of time. A special feature of this aqueduct bridge is the stepped nature of the piers below the imposts of the arches. Each step increase the width of the pier by half a roman foot (15 cm), almost certainly to increase stability. Similar stepped piers are known for the aqueduct of Metz in France. The bridge probably dates from the time of Augustus. There is a small quarry 100 m North of the bridge which may have provided the building stone.
The Ferreras aqueduct bridge can be easily reached from the N 240, but also from a parking on the A7 motorway (only for travellers coming from the direction of Barcelona!). From the parking, it is possible to walk in the specus over the aqueduct, and also to reach the valley below.

Cees W. Passchier

Tarragona - TARRACO (Francoli aqueduct)

Item Info
Length 15 km
Cross-section width 0,74 m (2,5 roman feet)
Volume Unknown
Gradient central part 0,2 %
overall 0,4%
Period Augustan
Features
  • major bridge
  • minor remains of other bridges
  • channel, see main text



Recommended literature :
  • G.M. Leather (2002): Roman aqueducts in Iberia pag 50 - 54
  • F. Sáenz Ridruejo (1977): Observaciones tècnicas sobre el abastecimiento romano de aguas a Tarragona (in: Segovia: symposium de la archaeologia romana 1974 (1977) pag 351 - 358)
  • E. Sanchez Lopez and J. Martinez Jomenez (2016): Los acueductos de Hispania, construction y abando (on the web)
  • J. Sanchez Real a.o. (1994): Datos para el estudio de los acueductos romanos de Tarragona (in: Quaderns d'Historia Tarraconense vol 13 (1994) pag 106 - 115)
Recommended website : None in particular.
How to visit : See descriptions above and below.

HOME More literature on more aqueducts Last modified: November, 2016 - Wilke D. Schram
(W.D.Schram 'at' romanaqueeducts.info)



Aqueduct map

First remains

Continuation

90 degrees turn

South side of the bridge

Modern channel on top

Information panel

In full view

Details of piers

Details of arches

East side

Oblique supports

Fallus symbol

Exit from the bridge

Detailed map

Ancient drawing

Remains in Tarragona

Remains of the Francoli

Avenida Catalunya