Monrovia Electricity — Transmission & Distribution
Design & Supervision of Transmission Line Rehabilitation — Greater Monrovia
World Bank / European Union / Government of Liberia
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Year
2020
Client
Liberia Electricity Corporation (LEC)
Funding
MCC / World Bank
Scope
66/33 kV transmission, ~60 km
Year
2021
Objectives & Context
Greater Monrovia's electricity transmission network had suffered severe degradation following two civil wars and years of deferred maintenance, resulting in high technical losses, frequent outages, and inability to transmit available generation capacity to consumers. The Liberia Electricity Corporation (LEC), supported by MCC and World Bank financing, embarked on a comprehensive rehabilitation of the 66 kV and 33 kV transmission infrastructure serving the capital. Designing a solution that could operate reliably in Liberia's challenging tropical environment — high humidity, salt air from the Atlantic coast, frequent lightning strikes — while meeting IEC standards and the requirements of international financiers demanded significant technical expertise.
Our Approach & Solution
TSC Global provided detailed engineering design and construction supervision services for the transmission rehabilitation programme. Design scope encompassed line route optimisation, tower structure selection and structural design, conductor sizing and sag-tension analysis, substation upgrade design at three facilities, and protection relay coordination studies. During construction supervision, TSC Global maintained a team of electrical engineers and technical inspectors on-site, overseeing contractor compliance with IEC standards, health and safety performance, and environmental mitigation measures.
Results & Impact
Rehabilitation of the transmission network reduced technical losses from over 30% to below 12%, significantly increasing the volume of generation capacity reaching consumers. Outage frequency in Greater Monrovia fell by approximately 55%, and the upgraded infrastructure is rated to carry additional future generation capacity as Liberia's generation fleet expands. The project was completed on schedule and received formal acceptance from LEC and the financing institutions.
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