| Units: | GWh |
| Mode: | Input Only |
| Multi-band: | False |
| Default Value: | 0 |
| Validation Rule: | Any Value |
| Key Property: | No |
| Description: | The amount of water released when starting a generating unit. |
Generator Head Storage Flow at Start is the amount of water released from the head storage when a generating unit is started. This release is included in the reported Water Release.