Sectors
Power
Sub Sectors
Hydroelectric
Services
Design & Engineering
Location
Iraq
The Darbandikhan Hydropower Project is a 3 x 83 MW installation located downstream of an existing 110 m high rockfill dam on the Diyala river. The powerhouse is constructed between the spillway and irrigation outlets at the toe of the dam.
The project involved complex enabling works to isolate the construction area from active irrigation flows using circular sheet pile cofferdams and prestressed anchors. The powerhouse foundation is located approximately 30 m below adjacent spillway foundations.
TCE’s scope
TCE provided comprehensive engineering and implementation support for the Derbendikhan Hydropower Project, covering all major power and auxiliary facilities associated with the development.
The scope included pre tendering works and detailed design engineering for the powerhouse, tailrace area, transformer yard, 132 kV GIS substation, river bank protection works, housing colony and associated auxiliary infrastructure. TCE also provided procurement assistance, including technical support during equipment selection and vendor coordination.
During execution, TCE carried out inspection and expediting of works and equipment, along with construction supervision for civil, hydro mechanical and electrical systems. The scope concluded with support during testing and commissioning of the generating units and associated balance of plant.
Impact
Operating at a gross head of 105 m with a design discharge of 358.5 m³ per second, the project delivers large scale hydropower using vertical axis Francis turbines under constrained dam toe conditions.
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