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Uma Oya Hydropower Project (UOHPP)

Uma Oya Multipurpose Development Project (UOMDP) was implemented by the Ministry of Irrigation and Water Management (MOIWM), presently coming under the purview of the Ministry of Mahaweli Agriculture Irrigation and Rural Development (MMAI&RD). The CEB technical staff is assigned to UOMDP Project Management Unit (PMU) to provide technical consultation services for Electro Mechanical works of the project.


UOMDP includes the components of construction of two dams across Uma Oya and a tributary at Welimada, trans-basin diversion tunnel, underground hydro power plant of 120 MW installed capacity, diversion of 145MCM of water to irrigate approximately 5000 hectares of land in Hambantota and Moneragala Districts and other downstream requirements. The expected annual energy production is 290 GWh. The power plant will be connected via a 22.7km length 132kV Transmission line to Badulla Grid Substation.


Pursuant to an Memorandum of Understanding (MOU) executed between the Minister of Petroleum and Petroleum Resources Development on behalf of Government of Sri Lanka (GOSL), and the Minister of Energy of Islamic Republic of Iran (GIRI) on 27th November 2007, the Cabinet of Ministers approved the execution of the Contract Agreement between the Executing Agency, Ministry of Irrigation and Water Management (MOIWM) of the GOSL and FARAB Energy and Water Projects (FC) of Iran dated 28th April 2008 to implement the "Uma Oya Multipurpose Development Project" by FC, as an Engineering, Procurement and Construction (EPC) contract.


Accordingly, FC undertook the detailed feasibility studies, preparation of detailed engineering design, procurement of all materials, equipment, machinery and physical construction, installation, testing and commissioning of the project. Total contract sum is US$ 529,059,198 and the Contract became effective on 15th March 2010.


When commencing the project on 15th March 2010, the scheduled date of completion of the project was on 15th March 2015. Due to the unexpected water ingress into the head race tunnel and followed by social impacts, date of completion (construction and implementation) is extended up to 31st December 2019 and the period of project is up to 31st December 2020 (with the defect and liability period). But according to the present time program the commissioning date is scheduled on September 2020. The progress of the project is 93.75% as at end 2019.


Spilling of Puhulpola Dam

Present View of Power House Machine Hall Floor

Installation of Turbine (Unit1)

Main Tunnel Breakthrough