Country: Mozambique Local: Macossa and Morrumbala

Completion date: 2019

Contracting entity:
AIAS (Administração de Infraestruturas de Água e Saneamento)

Project description

Macossa Village has no public water supply system, house connections and fonts . However, there are three small systems which supply public buildings. Morrumbala Village has a water supply system which serves part of West Area and part of East Area and some small individual systems that supply public buildings.

In the Preliminary Design phase was developed the diagnosis of the existing situation in terms of water supply, and different alternatives studied were identified. Solutions have been developed for two scenarios:

  • In the first scenario it has been considered that the percentage of connections, by service type, will remain during the project horizon.
  • The second scenario considered that the percentage of connections will evolve, during the project horizon, according with the Urban Water Strategic Plan objectives.

The recommended solution in the Preliminary Design for the Macossa Village included the following infrastructures:

  • 13 water boreholes (first scenario) or 20 water boreholes (second scenario);
  • 920 m of rising main (first and scenario), in HDPE, with diameter of 110 mm;
  • one water tank with 35 m3 of capacity (first scenario) or 70 m3 of capacity (second scenario);
  • one water treatment plant, which includes the construction of a water tank with 300 m3 of capacity (first scenario) or 500 m3 (second scenario) and a elevated water tank with 130 m3 of capacity (first and second scenarios);
  • 11.3 km of water distribution network (first and second scenarios);
  • nine standposts (first and second scenarios).

The recommended solution in the Preliminary Design for the Morrumbala Village included the following infrastructures:

  • 83 water boreholes (first scenario) or 132 water boreholes (second scenario);
  • one water tank with 360 m3 of capacity (first and second scenarios);
  • 2.84 km of rising main (first and scenario), in HDPE, with diameter of 250 mm;
  • one water treatment plant, which includes the construction of a water tank with 3 400 m3 of capacity (first scenario) or 5 400 m3 (second scenario) and an elevated water tank with 150 m3 of capacity (first and second scenarios);
  • 67 km of water distribution network (first and second scenarios);
  • 40 standposts (first and second scenarios).

In the Detailed Design phase, for the approved solution, it will made the implantation and hydraulic design of the infrastructures, as well as, the design project of the several specialities, such as civil construction, electromechanical equipment and electrical installations. It will be developed the tender documents.