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Reservoirs

El Mayés Reservoir

History.

The construction of El Mayés Reservoir began on the 23rd June 1975, its Provisional Acceptance being made on the 5th November 1981.

Photo of El Mayés Reservoir
El Mayés Reservoir

The works were fully financed by the State, which currently charges irrigation tariffs for making the supply available to the users of the Segura Right Bank Distribution Canal. These tariffs include the operating costs.

The document verifying readiness for construction was approved on 19th September 1975 and as a result, which dealt with some considerations regarding the works, in July 1977 an additional amendment document was drawn up (“Documento adicional por modificación Número 1”). These considerations were about the need to carry out a series of works connected with the location of the Hydroelectric Pumping Station, to the pump pipe and the general layout of the canal. They additionally involved a series of works regarding the regulating reservoir, specifically the speed of arrival, the huts for protecting the intake pipes, scour outlets, hollow jet valves and the alternative service road on the reservoir crest.

Photo of El Mayés Reservoir
El Mayés Reservoir

Once the works had been completed within the due term, their “Provisional Acceptance” was made on 5th November 1981. The following works were included in the file:

-Headworks and works for the access to the Ojós Hydroelectric Pumping Station.

-Ojós Pumping Station.

-Pump Pipe at Ojós.

-Canal on the Right Bank of the Segura.

-El Mayés Reservoir.

In December 1979 the “Project for reaching El Mayés regulating reservoir. Segura Right Bank Canal. Ojós Pumping Station. (MU/Ricote)” was drawn up. Once the works had been completed within the due term, their “Provisional Acceptance” was made on the 5th November 1981.

Photo of El Mayés Reservoir
El Mayés Reservoir

In September 1980 the “Project for the construction of floodgates in El Mayés reservoir spillway. Segura Right Canal River Bank. (MU/Ricote)" was drawn up. Once the works had been completed within the effective term, their Provisional Acceptance was made on the 10th February 1983.

In September 1982 the “Project for the consolidation and control of the abutment of the left riverbank of El Mayés reservoir (MU/Ojós)” was drawn up, as a result of the filtrations appearing in the vicinity of the discharge channel (related with a certain height of the reservoir). The fear of an increase in these filtrations meant that the maximum useful height was not achieved. The works consisted of:

The installation of six piezometers on the crest and in the downstream slope deep enough for reaching solid ground and therefore know the variations in the piezometric level downstream from the reservoir in the area in question.

Injections of cement grout at a very low pressure in the areas presumably affected.

The works began on 23rd December 1983 and their provisional acceptance was made on 6th March 1985.

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