he main objective of this assignment is to carry out the required designs and investigations for Mombezi and Maku-wa Dam project and Mulanje Dam project, developing also Dam Safety Management Plans
(DSMP) in line with World Bank requirements
As per collected information, BWB is estimated to service 66,822 individual connections, 813 water kiosks (for communal supply), and a further 3,000 commercial, industrial, and institutional connections. The utility manages a reticulation system of about 1407km and 23 reservoirs (of which four clear water tanks) with an estimated capacity of 97,317m3. The management of the system is divided into three zones, Limbe, Kabula, and Soche.
Specific Taks by project under this consultancy
a. Mulanje Dam.
- Prepare a Feasibility Study (technical, financial and economic) for construction of the Dam
- Carry out a full Environmental and Social Impact assessment for the construction of the Dam
- Prepare an optimized preliminary and the conveyance system to Nguludi Treatment Works
- Review the designs for Nguludi Treatment Works and recommend whether expansions are necessary
in line with the proposed dam works. - Carry out detailed design of the Mulanje dam, the conveyance system to Nguludi Treatment Works
and Treatment Works if proposed - Prepare the Dam safety management plans (DSMP) and Prepare bid documents for all proposed works
b. Mombezi Dam.
The dam was designed to have an active storage capacity of 71.6 Mm3 and a maximum height of 44m in-cluding freeboard. Its construction will lead to flooding around 620 ha of land upstream of the dam. The dam will be a rockfill dam.
The water treatment plant will be located around 1 km downstream of the dam, on the right bank of the river. Its capacity is 57,500 m3/s for the first stage and 57,500 m3/d too for the second stage.
The transmission system was designed to comprise of (i) three (3) pumping stations, (ii) pipelines ranging from 250mm to 900mm for a length of around 100km and (iii) three (3) new reservoirs, of which two of them would be constructed with the city of Blantyre while one would be located at the treatment works.