Request changes for Upstream Headwall
| Element | Description | Element Code | Essential | Uniclass 2015 |
|---|---|---|---|---|
| Upstream Headwall | A retaining wall at the inlet of a culvert or outfall. Includes wingwalls (either as one continuous element or as additional headwall elements if they are a separate construction). | UHL | No | Ss_20_50_30_37 |