Soffit (culvert or bridge)
This is the level of the top of the interior of a culvert, or the underside of the deck of a bridge.

Related Articles
Open Channel System with a Culvert and Bridge at Bowen- Queensland
The file for this example Bowen Channel + Stream Example - Lite & Full Unsteady.drn, is located in the folder C:\ProgramData\Drains among the Lite examples. If this folder is hidden, in File Explorer select the View tab and tick the Show Hidden Items ...
Culvert hydraulics
While culverts are simple in concept, consisting of a pipe, an entrance and an outlet, their hydraulics can be quite complicated. Many combinations of flows can occur, depending on the headwater and tailwater levels, whether flows inside the culvert ...
Bridge drawing tool
This tool, , allows you to place a bridge in the Main Window. When you click on this, the arrow cursor changes to a pencil. Click the point of the pencil where you wish to locate this item and the bridge symbol will appear. To enter data, right-click ...
Bridge property sheet
This window requires entry of data specified in the AUSTROADS Waterway Design Manual (1994) based on methods of the U.S. Federal Highway Administration (Bradley, 1970), which is the source of the methods used here. If unsteady flow hydraulic ...
Culvert drawing tool (obsolete)
This tool has been discarded by DRAINS, and will only appear if it is part of a model created before November 2012. It has been replaced by the combination of a headwall, pipe and overflow route When you right-click this culvert object, a small menu ...