In cases where there is stream grading (especially in cases where there are low flow channels in the stream) occuring what would be the reasons for using Bridge modeling approach instead of culvert modeling for a 3 sided bottomless structure? I'm noticing that design criteria is being created...
I'm assuming this must be something with my ineffective flows or critical depth or something but my 100yr WSE is nearly a foot lower than my 25yr WSE. I have 3 - three sided bottomless 20'x7' structures. Flow is 2199cfs for 25yr and 3562cfs for the 100 yr. Starting Known WSE is different for...
