Rehabilitation of the Pucará Hydroelectric Power Station

Definitive design

«Rehabilitating the load tunnel of Ecuador's pioneering hydroelectric power plant, merging innovative engineering with technical rigor.»
The 73 MW hydroelectric power plant stopped operating in September 2011 due to a landslide that affected the final section of the loading tunnel.

Damage to the tunnel, between abscissae 4+900 and 5+100 km, led to the need for urgent repairs to restart plant operation, so rehabilitation work was designed, including the construction of a 520 m long bypass tunnel (D=2.70 m) and a 380 m long independent access tunnel.

The solution sought to ensure safe operation of the pipeline by locating the bypass tunnel in a more stable area with greater coverage, 75 m south of the area affected by the landslide.

The tunnel has an internal design pressure of approximately 8 bar, and the damaged section is isolated from the hydraulic circuit by plugs and drained to prevent the development of ground pressures.

  • Tunnel safety
  • Hydroelectric power plants
  • Hydraulic tunnels and shafts
  • Hydromechanical equipment
  • Operation & Maintenance
380 m

Access tunnel length

520 m

Bypass tunnel length

2.70 m

Bypass tunnel hydraulic diameter

73 MW

plant power

Lat: -1.079977
Lng: -78.447583

Tungurahua, Ecuador