Polgolla Barrage
The Polgolla Barrage, is a barrage built across the Mahaweli River at Polgolla, in the Central Province of Sri Lanka. The barrage is used to increase the volume of water, for transfer to the hydroelectric power station located north, via penstock.
Polgolla Reservoir Waterdrome operates a short distance upstream on the lake created by the barrage.Power station
Water from the Polgolla Reservoir is transferred to the Ukuwela Power Station at, near Ukuwela, via a long underground penstock. Water from the reservoir is transferred to the power station at a rate of.
The power station at Ukuwela consists of two hydroelectric generators, totalling the plant capacity to. Both units were commissioned in July 1976. Water from the power station is discharged into the Amban River, a major tributary to the Mahaweli River, which then connects back to the Mahaweli River at a distance of approximately downstream of the Polgolla Barrage.
