| Areas | The weir areas |
| Count | Return number of elements in the set, -1 if not defined |
| Discharges | Gets all the Discharges of the collection. |
| HNeg | The negative (downstream) water levels. |
| HPos | The positive (upstream) water levels. |
| HWeirs | The weir water levels. |
| Item | Get and set level data for each level |
| Widths | The weir widhts |