Technical Expertise

Multidisciplinary teams comprising of specialists across ten industry sectors, we have the expertise necessary to grapple with challenging assignments.



Commitment to Clients

Our business is built on relationships, and our clients will always be our top priority.

View all Projects >

Featured Project

Silvertown Tunnel London UK

Silvertown Tunnel
One of the largest engineering projects in the world.

learn more >

Who We Are

International Award-Winning Engineering Consultants who deliver ground breaking solutions at the forefront of industry best practice.

learn more >

Our Regions

Carbon Reduction Plan

About - office locations image

Our Commitment to Net Zero
ByrneLooby is committed to becoming a net zero engineering consultancy by 2040

learn more >

Stay Up-to-date

Stay on top of the latest developments, appointments, awards and more across all our offices.

View all News >

Featured News

Irish Concrete Society 40th Annual Awards

Irish Concrete Society 40th Annual Awards

ByrneLooby Celebrates Highly Commended Award for  contribution to the Blanchardstown Regional Drainage Scheme


Investing In Our People

Cultivating a culture in which individual differences and the contributions of our staff are recognised and valued.

meet our people >

Our EDI Policy

Careers - Image

Celebrating People
Fostering a culture where you are encouraged to be yourself.

learn more >

International Presence

Multidisciplinary team comprising of specialists across Ireland, UK and the Middle East.

Follow us:

  • LinkedIn - blue70px
  • Twitter - blue70px
  • Facebook - blue70px
  • Instagram - blue70px
  • Vimeo - blue70px
  • Issuu - blue70px


Contact Us

We would love to hear from you. Please fill in the quick contact form below.

Send a message

Cristo de la Expiración Bridge (Cacchoro Bridge)

A landmark in the city of Seville

     An Ayesa Project     


Department of Public Works and Transport, Junta Seville


Guadalquivir, Chapina, Seville

Completion Date


Capital Cost:



This urban bridge is known as the Cristo de la Expiración Bridge (or the Cachorro Bridge) and is located in Seville. The topography of this bridge dates back to 1948 when the river became blocked, creating a landmass called the Chapina Blockage, and from then Seville provided the river’s natural exit to Alijarafe and the western part of Spain. In 1992, to mark the occasion of the Seville World Expo, the Department of Public Works and Transport redeveloped Seville to showcase architecture, transportation and design and the Chapina river earth plug/landmass was to be redeveloped into a new bridge to cater for increased vehicular traffic and a new bus station under construction nearby.

Type of bridge: The bridge is a deck-arch bridge of metallic structure, with low parallel wishbone arches with an overhead deck of orthotropic sheets, and dual labelled pylons.


The Department of Public Works and Transport Appointed Ayesa as a designer, structural engineer and project manager. The founder of Ayesa, José Luis Manzanares Japón, designed the 225-metre deck-arch bridge which was inspired by the Pont Alexander III Bridge in Paris and serves both vehicle traffic and pedestrians. The approach was to remove the Chapina blockage which meant the removal of over 4km of the riverbed and to convert the lands into a river island on which a new striking bridge would be built. The photos below show the project before and after the removal of the Chapina blockage, with both Cordoba station and the construction of a new bus station clearly visible. The bridge is a steel structure, with two lowered arches spanning 130 metres with no underwater support, which supports a deck of 225 m x 30 m x 30.5 m wide. The pedestrian crossings along the bridge are covered with white tarpaulins that resemble sailing masts but provide shade from the heat for walking pedestrians. The bridge was completed in 1991.

Foundations: The arches are supported by 600 m² and 22 m cut-off enclosures (built on the Guadalquivir blue marshes) with the interior strengthened by cement grout jet, 10 m of the upper section was hollowed, and the earth was replaced with dry compact concrete. The deck, outside of the arch, is supported by reinforced concrete, piled, and utilised as the registration and service control area for the bridge.

Project Management

On December 19th 1989, an Ayesa-owned company Aynova was appointed to manage the project on behalf of the Highway Management Division of the Public Works and Urbanisation Ministry.

Distance of Riverbed Removed


2 Lowered Arches

130 m


225m x 30m x30.5m wide