Spillway Criteria
Spillway Criteria
(OP)
I am looking for guidance on selecting the proper storm for spillway design. The embankment will be 3 or 4 foot high. Probably about and acre. It seems to fall under any state requiements for permitting.





RE: Spillway Criteria
RE: Spillway Criteria
for detention ponds we route the 25 year storm thru the principal structure. for small ponds we make sure the structure can pass the 50 year unrouted (ie clogged orifice with a full pond). For larger ponds we make sure the 50 year doesnt overtop. we rarely use freeboard above the 50 year which im thinking about changing. however in our flat topography it is difficult to get.
RE: Spillway Criteria
The Corps of Engineers has many design guides for dams and spillways. Try searching their website.
In Oregon, the State Water Resources Department regulates small and large dams and has design criteria. What agency in your state performs this function?
RE: Spillway Criteria
Thanks