Extran Self-Regulating Tide gate

I am working on a model to analyze the tidal influence on a detention
basin. There is a junction structure along the outfall pipe, from the
detention basin, with a self-regulating tide gate. I want to close the
tide gate at elevation 4.0, to prevent water above this elevation from
getting into the detention basin.

I'm a rusty SWMM user and not sure how to do this? Can this be
accomplished from the Extran I and J data groups, and will this work if
my tide gate has both upstream and downstream conduits?

Thanks,
Jon Marshall, Civil Engineer
JMarshall@TRANSYSTEMS.COM

Jon - recommend you use a type 23 gate on the F1/F4 cards, based on head
on the tidal side of the gate at the downstream side of the junction
structure. The discharge pipe from the junction structure to the pipe
outfall would be modeled as a standard pipe (C1 card), and the exit
would be a "free" outfall. The tide will back up the pipe to the
junction where it controls the gate.

Hope this helps.
Ron Kilmartin
ronkilmartin@attbi.com