Study for the improvement of hydraulic and water quality behaviour of spillways in the sanitation system of VITORIA-GASTEIZ (Spain)

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The main objectives of the project were:

  • Reduce the number and quality of discharges into the river according to European recommendations.
  • Prevent the impact of river overflows on the sewage system.
  • Improve maintenance conditions.

Proposed actions were:

  • Divert natural streams that currently are running through the sewage network.
  • Construction of Combined Sewer Overflow Tanks, mechanical sieve and flow gates to prevent spills.
  • Construction of new concrete manholes and inspection chambers as well as a security CCTV system.