Hi
Sorry for slow respond.
You are right with everything.
Everything has to be for 2 year event 2.90"/hr. The site is 3.108 ac, grassy field with flow path 330 ft (from SE to NW) CN=39, slope 1.3%, TC= 2.4 min. On the edge of the property there is a ditch (is going a round the property S to E...