| Appurtenant structures | ||
| Spillways It shall be capable of draining the biggest calculated flood without the dam being submerged. |
 Gated spillway at Luzzone  Räterichsboden morning glory spillway  2 skijump spillways and 2 orifice spillways during the 500 years flood at Jiroft dam |
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| Bottom outlets It is for lowering the water level in case of need or emptying the impounding reservoir completely. It may also be used for draining sediment deposits in the impounding reservoir. |
 Use of the bottom outlet of Shahid Rajaee during construction |
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| Intake This is for collecting water in the impounding reservoir and taking it through a pipe, penstock or channel to a power generating station or any other structure for irrigation or drinking water supply. |
 Upstream face of Shahid Rajaee dam: 1.- Intake 2.- Bottom outlets 3.- Irrigation gates |
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