Continue to Site

Eng-Tips is the largest engineering community on the Internet

Intelligent Work Forums for Engineering Professionals

  • Congratulations waross on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Sizing a riprap basin for oversized box culvert outfall 1

Status
Not open for further replies.

cside

Civil/Environmental
Sep 22, 2004
1
US
I am trying to find some reference material regarding the sizing of riprap outfall basins for larger diameter outfall culverts. The only references I can find provide sizing tables for pipes with diameters up to 96". However, due to lack of significant head on the lake outfall structure, the outfall culvert has to be a box that has a greater outfall orifice area. The velocities coming out of the culvert are low enough to allow for a riprap outfall, but I just can't find any materials that would detail how to size the basin. Any suggestions are greatly appreciated.
 
Replies continue below

Recommended for you

The PA Erosion and Sediment Pollution Control Manual available here:


on pages 119-121 gives the equations in terms of D, so you can just use Deq of a rectangle =2L1L2/(L1+L2) to get D.

This will pass in PA, USA, so run it by the local reviewer first.
 
Status
Not open for further replies.

Part and Inventory Search

Sponsor

Top