scour depth for culvert footings
scour depth for culvert footings
(OP)
I am placing a 9 ft wide, 22.5 ft long bottomless arch box culvert in a creek. There is no firm data for 100 year peak volume. The dimensions are set by fish passage requirements, rather than hydraulic. The capacity is more than 3X compared to upstream culverts on the same creek.
The design calls for concrete footings placed below the streamgrade. Since this is a small project, the cost of concrete is cheaper than detailed geotechnical analysis. Is there a rule of thumb to estimate the necessary depth for the bottom of the footings to ensure that it is below the scour depth?
The design calls for concrete footings placed below the streamgrade. Since this is a small project, the cost of concrete is cheaper than detailed geotechnical analysis. Is there a rule of thumb to estimate the necessary depth for the bottom of the footings to ensure that it is below the scour depth?





RE: scour depth for culvert footings
Just curious: why is an Electrical Engineer designing culverts ?
good luck
RE: scour depth for culvert footings
RE: scour depth for culvert footings
RFW7437: Yes, I am an EE, and completely unqualified to design this job, but it is on my own property. I have managed to cobble together the required information by asking lots of questions (many of them really dumb). It's been fun learning about civil engineering and hydraulic projects. Its a good break from making chips.
Thanks to both of you for your help!
RE: scour depth for culvert footings
RE: scour depth for culvert footings