News and Press

November 2018
OSSA awarded the Potencia prize (Spain).

OSSA has been awarded the Potencia prize in the category “Tunnels and Underground Works” for its project “Expansion of the Bekkelaget treatment plant” (Norway).

The Potencia awards, which celebrate its twelfth edition, recognize the quality and innovative effort of Spanish construction and engineering companies in the design and implementation of large projects throughout the world.

November 2018
The Chironta Reservoir Diversion Tunnel broke through (Chile).

The Chironta Reservoir Diversion Tunnel, which OSSA is executing for the Dragados-Besalco consortium, broke through. The tunnel has a general section of 58 m2, a 477 m length and 2.5% slope. The contract also includes 37 m of a 105 m2 cavern for the future valve housing.

Cale Chironta
November 2018
The works in the Sinifaná tunnels are progressing at a good pace (Colombia).

The works of the Sinifaná tunnels, which OSSA is executing in Colombia for the Concessionaire Vial del Pacífico, are advancing at a good pace. The awarded contract consists in the excavation of two tunnels in parallel, of 1,400 m length each, with a cross section of 85 m2. We leave you with an interesting video where you can see the development of the works.

October 2018
Two scientific articles based on the R&D project TUÑEL.

We are pleased to share two scientific articles based on the project TÚÑEL (“Research project for the competitive improvement of the drilling and blasting cycle in mining and underground works through the conception of new engineering techniques, explosives, prototypes and advanced tools”). This R & D project is being possible thanks to funding from the Spanish Ministry of Economy and Competitiveness, through the CIEN program of the Center for Industrial Technological Development (CDTI).

October 2018
Two shafts at the Atacama, Copiapó and Chanaral Desalination Plant.

OSSA is building two shafts using the drill & blast technique, with shocrete reinforcement. The use of bolts as part of the support is also included, and three steel frames at the beginning of the shaft.

September 2018
OSSA has won an appeal against the Norwegian Roads Administration (Statens Vegvesen).

The Court ruled that OSSA possessed the capacity and the resources necessary to perform the works and that the Norwegian Roads Administration terminated the contract illegally.

June 2018
The Compostela – Las Varas section (México).

The works of the Compostela – Las Varas section of the Jala – Puerto Vallarta highway in Mexico are advancing at a good pace. We leave you with this impressive video that shows the development of the works, we hope you will like it!

November 2017
The CODELCO Andean Division project (Chile) on inGEOpres magazine.
April 2018
Los Leones Metro Station, Santiago (Chile).

OSSA has executed, in consortium with the Chilean company Echeverría Izquierdo, the Los Leones Metro Station project for Metro of Santiago (Chile). The Los Leones Metro Station combines metro Lines 1 and 6 and includes also the civil works of the station entrance.

We leave you with this amazing video.

April 2018
The Haulage III tunnel (Chile) broke through.

Here is a video of the Haulage III Tunnel, 4,833 m long and 42 m2 section, an important milestone for the “New Transfer System” in the Andina Division (DAND) of CODELCO (Chile).

Congratulations to the whole team!

April 2018

The Jala – Las Varas project (Mexico) advancing at a good pace.

The works at the Jala – Las Varas section of the Guadalajara – Puerto Vallarta highway in Mexico are advancing at a good pace. The project consists of the excavation and support, using top heading and benching, of three road tunnels with a cross section of 21.1 m x 11.4 m. The total length of the excavation of the 3 tunnels is 595 m (240 m, 235 m, 120 m), with a longitudinal slope of between 0.3 to 3.0% and a maximum and minimum overburden of 40 m and 12 m respectively. The excavation is carried out by using conventional means. The temporary support is based on shotcrete, corrugated grout rock bolts, metallic trusses with IR type profile 203 x 59.6k kg/m. The final reinforced concrete lining will be 40 cm thick.
April 2018
The Haulage III tunnel (Chile) broke through.

The Haulage III tunnel, 4,833 m long and 42 m2 cross section, broke through. This is an important milestone for the “New Transfer System” in the Andina Division (DAND) of CODELCO (Chile). The mine is located in the central part of the Andes Mountain Range, V Region of Valparaíso, 50 km northeast of Santiago, and exploits the Río Blanco copper deposit.

Good job!

Cale túnel Haulage III
April 2018
Good performance of the Atizapan tunnels (Mexico).

Good performance of the Atizapan tunnels (Mexico), that OSSA is currently executing for the company CPVM S.A. de C.V. The project involves 2 road tunnels, Cahuacan and Los Gallos, 113 and 208 meters long respectively. The top heading excavation is excavated in 3-phases and 2-phases in benches. Self-drilling 14m long bolts are used throughout the tunnel as canopy, and micro piles are used in the portals. Also metal trusses 152×37.2 are placed every meter.

Túnel Cahuacan II
April 2018
OSSA bags its first contract in Colombia.

OSSA begins its activities in Colombia with the construction of the Sinifaná tunnels, in Antioquia province. The awarded work consists in the excavation of two tunnels in parallel, 1,400 m each, 85 m2 cross section. These works belong to the project called Autopista Conexión Pacífico 1, which in turn belongs to a larger project called Autopistas para la Prosperidad.

With the entry into Colombia, OSSA will have a great opportunity in a country where the construction of more than a hundred kilometers of tunnels in the medium term is planned.

Sinifana
April 2018
Hidromanta project (Peru) advancing at a good pace.
The tunnel of the Hidromanta Hydroelectric Project in Peru, which OSSA is executing for the Cobra group, is advancing at a good pace, having already accomplished 43m. The project consists in the excavation of a 1,858 m hydraulic tunnel, with reinforced concrete slab, cross section 3.2 x 3.75 m and temporary support with shotcrete.
Hidromanta
February 2018
Project awarded: Cerdedelo Tunnel (Spain).

OSSA has been awarded the works for the completion of the Cerdedelo tunnel, which is part of the Porticamba-Cerdedelo section of the Galician High Speed Train. The materials to be excavated are slates of poor quality. The temporary support will be based on bolts, trusses, shotcrete and canopy tubes.

 

January 2018
Project awarded: Elevators Line 5 for Metro S.A. (Chile).

The project “Engineering, Supply and Construction Elevators of Line 5 Project ” of Metro S.A. has been awarded to OSSA in consortium with the Chilean company Echeverría Izquierdo.

In order to comply with the current accessibility regulations, Metro S.A. has decided to implement elevators in all stations in the existing metro network. The project awarded to OSSA includes the implementation of 26 elevators in 9 stations.

January 2018
Los Leones Metro Station, Santiago (Chile).

OSSA has executed, in consortium with the Chilean company Echeverría Izquierdo, the Los Leones Metro Station project for Metro of Santiago (Chile). The Los Leones Metro Station combines metro Lines 1 and 6 and includes also the civil works of the station entrance.

We leave you with these amazing 360º images.

January 2018
Diversion tunnel of the Chironta reservoir (Chile).
OSSA has been chosen by the Dragados-Besalco consortium for the construction of the diversion tunnel of the Chironta reservoir (XV Region, Chile). The project consists of the execution of 440 m long tunnel cross section 8 x 8 m (58 m2) and a 37 m long cavern for the future housing of valves of section 12 x 12 m (105 m2).
December 2017
Expansion of the Bekkelaget water treatment plant (Oslo, Norway).
OSSA has completed the works for the expansion of the Bekkelaget water treatment plant (Oslo), the largest environmental project being carried out in Norway, which has involved the underground excavation of more than 445,000 m3 of rock. In the attached video you can see the magnitude of the work performed, congratulations to the entire construction team!
December 2017
Hidromanta contract awarded (Peru).
OSSA has signed contract with the Cobra group for the construction of the Hidromanta hydropower plant hydraulic tunnel in Peru. The project consists in the excavation of a 1,858 m hydraulic tunnel, with reinforced concrete slab, cross section 3.2 x 3.75 m and temporary support with shotcrete.
November 2017
Break through at the Guadalajara – Puerto Vallarta highway (Mexico).
November 2017
Opening of Metro Santiago Line 6 (Chile).
November 2017
The Chuquicamata mine underground project (Chile) on inGEOpres magazine.
November 2017
Headrace Tunnel Breakthrough
Capulin-San Pablo Hydropower Project (Costa Rica).
September 2017
Site visit to Los Leones metro station (Santiago de Chile).
August 2017
The Bekkelaget project (Norway) on Tunnel Info magazine.
August 2017
OSSA appears on CODELCO’s magazine (Chile).
July 2017
Tunnel breakthrough achieved at the Renace IV hydropower project (Guatemala).
March 2017
OSSA: working under volcanic areas in Costa Rica.
February 2017
OSSA is carrying out the construction works on a sewage treatment plant expansion in Oslo (Norway).
January 2017
Recognition of the best Comprehensive Management in Occupational Health and Safety in Chuquicamata Mine (Chile).
April 2016
Crossing natural obstacles. Wayrasencca Tunnel (Perú).