Applies To Product(s): Bentley PondPack Version(s): 08.11.xx.xx Environment: N\A Area: Modeling Original Author: Scott Kampa, Bentley Technical Support Group Problem A user notification is being generated that says: "Invert elevation on volume curve xxx.xx ft is greater than lowest outlet headwater elevation xxx.xx ft." Solution The elevation for the outlet structure should be at or below the invert elevation of the pond that it is associated with it. The first thing to check is to make the correct headwater range is being used for the composite outlet structure. If the wrong pond was selected, this issue could occur. If the right pond or headwater range is selected, next make sure the setup of the composite outlet structure is correct. For instance, the upstream invert of a culvert may have an elevation below the invert of a pond, however it might actually be setup to take flow from a riser or orifice. If the setup is like this, make sure the Downstream ID field for the riser or orifice is set to the culvert. With this setup, the user notification will not occur and the invert of the culvert can still be below in the invert of the pond.
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