| Units: | MW |
| Mode: | Input Only |
| Multi-band: | False |
| Default Value: | 0 |
| Validation Rule: | ≥0 |
| Key Property: | No |
| Description: | Initial flow on the waterway for use in enforcing first period ramp constraint. |
Waterway Initial Flow is initial (t=0) flow on the waterway for use in enforcing first period Max Ramp constraint.