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Recent content by red9

  1. red9

    Why would a culvert be replaced due to severe erosion at outlet?

    After many years of installing and designing protection for culvert outlets, I have found that if there is a fairly uniform "scour hole" at the outlet end, the culvert is often sized too small. (Just a visual rule fo thumb, always do a good desing). Easily erodable soil type and deficiencies...
  2. red9

    Simple Dam Breach using Hec-Ras

    Thanks for the reply and thread reference. As a further note, if I use a stage hydrograph at the upstream end, and a uniform lateral flow beginning at the first full station in the lake, downstream to the embankment, the program will run, results look reasonable, but I am unsure whether they...
  3. red9

    Simple Dam Breach using Hec-Ras

    I am relatively new to Hec-Ras, and have a dam breach to perform. Using NRCS SITES program, I have determined the maximum water surface level of the dam. I can input cross section data; steady flow analysis works using a trial flow, but unsteady flow analysis does not. Looks like I should be...
  4. red9

    Steel Pipe Suppliers

    Does any know of a steel pipe supplier in AR, TN, or the MS area? I have a client that wants to use heavy walled steel pipe in an earth dam. 18" and 24" diameters are needed.
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