Nacala Boreholes, Transmission Mains, and Distribution Centres | Nicholas O’Dwyer

Project Title:

Location:

Nacala, Mozambique

Client:

Fundo de Investimento e Património do Abastecimento de Água (FIPAG)

Business Sectors:

Environment, Water Resources

Services (Technical Disciplines):

Preliminary Design
Detailed Design
Tender Dossiers
Procurement
Construction Supervision

Project Objectives/ Outcomes:

The Nacala water supply distribution system is supplied by two sources. The first source is a dam on the Muecula River some 30 km south west of the city. The reservoir has a storage capacity of about 4.4 million m³. The dam was rehabilitated and raised to expand the capacity of the reservoir to facilitate a supply increase from 7,200 to 10,000 m³/day.

The second source for the distribution system is the Mpaco and Mutuzi (I and II) well fields. These well fields have a total of ten boreholes with flows between 1,080 and 2,400 m³/day each, resulting in a combined capacity of 13,920 m³/day. Further groundwater investigations indicated that the sustainable capacity of this second source was 23,000 m³/day. This project provided for the construction of the following works: Development of 22 No. Borehole sources together with collection systems; 2 No. 200m³ RC collection reservoir and 1 No. 100m³ RC collection reservoir; 4 No. High lift Pumping stations; Approximately 10km of 350mm and 17km of 200mm transmission mains; 2,000m³ service reservoir and 250m³ water tower; Extensive mechanical and Electrical works.

Our Role:

Preliminary and Detailed Design of Groundwater Abstraction Systems, pumping stations, Transmission Mains
Design review of Distribution Centre and Water Tower
Preparation of Tender Dossiers
Review the Environmental Management Plan (EMP) prepared by the Contractor
Supervision of the construction, commissioning and hand-over of the Schemes
Monitoring the Contractors design progress in accordance with the Contractual Programme
Instructing and monitoring the Contractor regarding compliance with health and safety precautions
Review of payment applications and approval of all eligible payments for the Employers action

Geoscience Ireland Contact:

Michel Davitt – mdavitt@nodwyer.com