b. Benidorm’s 1964 sewage tunnel
The photograph sequence below shows the sewage outlet constructed in 1964 from the Rincon de Loix, along the coast to a point where it enters a tunnel through the Sierra Helada. The tunnel can be accessed through a service door and it provides a way into the lower cliffs under the Sierra Helada.
This outlet was the first solution to the problem of sewage during the expansion of Benidorm in the 1960s, but ultimately it proved quite insubstantial and a completely new system had to be designed. It is now a historic remnant of the interim stages of Benidorm’s development, and in itself it is quite an interesting feat of engineering.
Fuller details will be provided later with the history of the system and when it was last in use, as this will be useful for local geography work on Benidorm.
In this inlet to the north east of Benidorm we find the 1964 sewage system.
Manhole covers on the concrete channel give the date of the installation
This is the last section of the conduit above ground before it disappears into a tunnel carved into the limestone
The tunnel can be accessed by a service door and cuts through the rock to the outlet in Sierra Helada
Brick sections are built through softer rock where the roof is more likely to collapse
Other sections are more robust because they are cut through Sierra Helada limestone
At the end of the tunnel a booster pump remains. It was probably a petrol powered pump to aid the gravity flow from Benidorm
Finally the outlet reaches a vertical concrete pipe plunging down the cliffs below: raw sewage was dropped into the sea, a short distance updrift from Benidorm!
View of the limestone and sandstone cliffs of Sierra Helada, to be dealt with in a separate blog page on geology.