PROJECTS WE HAVE DONE
1.0 Water & Wastewater
A) United Kingdom
NGM Consulting Engineers Ltd has been working on Water Projects in Zambia since 2013 but the combined experience of its Partners and Associates is over 20 years. The main area of expertise is in Design of Water Treatment Plants, Design of Water and Waste Water Networks, Boreholes, Drainage Design, Water and Waste Water Modeling and Design, Design and Installation of pipelines, and Non-revenue water management (Reduction).
Before it was incorporated in Zambia, NGM Consulting Engineers operated in England and Scotland as NGM Bro Ltd and worked on several projects for
Severn Trent,
Scottish Water,
Anglian and Southern Water, under Mouchel Parkman and MWH Global as sub Consultants. The work involved calibration of hydraulic models, demand model production, GIS build, water structure rehabilitation and pipe line designs.
B) Zambia
NGM Consulting Engineers Ltd has been involved in 3 major water projects in Zambia that involved Design and Construction Supervision of New Treatment Plants, Water Distribution Centers, Transmission mains and Water Distribution pipe networks.
Other works involved the production of water demand models for water systems and the rehabilitation of existing concrete water tanks and treatment plants, including filters and clarifiers.
1.1 Nkana East New Water Treatment Plant
The works above were part of the Nkana East New Treatment Plant Design and Construction Supervision works. A new 66,000 cubic meter Water Treatment Plant was constructed to reinforce the existing plant. It included a splitter chamber, mixing chamber, flocculation basin, sedimentation basin, Filters, a filter gallery, a clear water tank and a back wash tank. The estimated value of this contract was $5 million Dollars and was conducted under FIDIC.
Under this same contract NGM Consulting designed and supervised the construction of a Chlorine Building, Chemical Building and the rehabilitation of the existing plant. The works included the installation of new pumps in the existing high lift pump house, rehabilitation of existing clarifiers, rehabilitation of existing filters, installation of new back wash pumps, and installation of new valves and replacement of filter siphons.
We were responsible for checking the quality of the works and approval of all the materials, design reviews measurement of completed work and preparation of measurement forms that formed part of the payment certificates for approval by the main consultant. We were responsible for the safety, material tests approvals and final inspection of the structures before they were certified complete and handed over to the client
The figure below show some rehabilitated existing clarifiers at the Nkana East water Treatment Plant in Kitwe
The structure below was constructed in order to split the flow between the new treatment plant and the existing plant into 30,000 cubic meters per day and 60,000 cubic meters per day.
Figure 4 newly constructed Splitter Chamber and the Nkana East Treatment Plant
The figure below is the complete new treatment plant and was tested and commissioned.
Figure 5 The newly commissioned Nkana East Water Treatment Plant
1.2 17th Avenue Project
The 17th Avenue elevated water tank is so called because it was constructed along Central Street on 17th Avenue. These works involved the construction of a 35m elevated concrete water tower to boost pressure in high elevation areas of the Kitwe City Center and parts of Nkana West. On the same site there was installation of 11 new pumps in the existing pumping station and the installation of submersible pumps in the existing reservoirs. The estimated cost of the project was $1.1 million US Dollars
1.3 Bulangililo Water Treatment Plant Rehabilitation
NGM Consulting Engineers was commissioned to supervise the rehabilitation works at the Bulangililo Water Treatment Plant under the Nkana Water Supply and Sanitation Project. The works included the removal of existing raw water pumps at the intake and replacing them with new one. Repair of exiting filters and clarifiers. Replacement of existing pumps at the high lift pump house. General repairs to the existing buildings including replacing electrical components and valves.
The figure below shows the newly installed filter nozzles on a rehabilitated slab ready to receive the filter sand. The type of filters are degramont.
1.4 Kwacha Road Distribution Centre
This distribution center near Kitwe Central hospital had one of the existing reservoirs abandoned. NGM Consulting Engineers was commissioned to supervise the works and conduct design reviews of the rehabilitation of the existing 22,500cubic meters concrete tank. The outer radius of the reservoir is 54.8m and the height is 9.85m, top thickness is 254mm, bottom thickness is 356mm. The curvature radius of its dome ring is 57.45m and the height is 6.4m from the top water level to the top of the dome ring. The estimated cost of the rehabilitation works was $ 2 million US dollars.
1.5 Nkana Water Pipelines
The supervision of pipe installations was also part of the works done by NGM consulting engineers and most prominent was the pipeline linking the newly constructed water tank at 17th Avenue with the Distribution Center and Ndeke DC.
1.6 Building Engineering
Our company is also into Building Engineering and was responsible for the Design and Construction supervision of the New Offices for Nkana Water and Sewerage in Riverside for Gauff Engineers who were the main consultants. The Contractor was Hua Chang Engineering Corporation Ltd.
1.7 Mechanical and Electrical Engineering
Among the Mechanical works supervised were the installation of pumps and control panels including switch gears and associated fittings for Ndeke Pump House, Nkana East High lift pump house, Bulangililo, Mindolo and Wusakile.
1.8 Rehabilitation of Nkana East Sewer Treatment Plant
NGM Consulting Engineers was also involved in the supervision of works during the rehabilitation of the Nkana East Sewer Treatment plant
1.9 Design & Equip Boreholes
We are also involved in the following works:
- Water Survey
- Borehole Drilling
- Design & Equip
- Service and Maintenance.
1.10 Building Works
We have also been involved on a smaller scale in Building Construction of Houses, Schools, Story Buildings, Hospitals and any other Building Structure in Zambia. We also service and maintain Buildings.
1.11 Service & Maintenance of Prepaid Water Stand Pipes
We were involved in the construction of water kiosks installation Prepaid Water Metering System in the entire Kitwe and North-western Province for North Western Water and Sewerage Company
1.12 Design and Construction Supervision of Elevated Steel Tanks
We undertake to perform the following Tasks:
Soil Investigation.
Design of Foundation
Design of Steel Support Structure
Design of Panel Tank Capacity, Materials Structure and thicknesses of Panels.
Design of Tank Pipe Work
Erection of Steel Tanks.
1.13 GIS Build
Worked on GIS Mapping and network verification for Mulonga Water and Sewerage Company limited in Chingola, Mufulira and Chililabombwe.
1.14 Millennium challenge account Zambia projects
Worked on drainage designs and supervision in Lusaka during millennium challenge account Zambia projects.
1.15 RIVER MODELLING
With the use of various modelling software and GIS packages, our company is able to simulate river models, that would help in flood management and monitoring of river water levels that will help to mitigate the impact of droughts.
1.16 Pre-Fabricated Houses, Farm Houses and Offices
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1.17 THE GREATER MAPUTO WATER SUPPLY PROJECT
The main objective of the greater Maputo water supply project done together with GITEC for the Mozambique government, was to increase access to clean water for residents in the greater Maputo area.
