List of Contributions

Still waiting for the call-in information, Mark. ------------------------------ Lawrence Magura P.E., D.WRE(Ret.), F.ASCE OWNER Lake Oswego OR ------------------------------

Years ago, I served as a regional engineer for the Ductile Iron Pipe Research Association (DIPRA). I bet I handled dozens of questions similar to yours. The best answer we came up with is "it depends." On what? Does the pipe have an internal or external corrosion problem? You don't indicate which is ...

Of perhaps greater concern to me is what was the proximate cause of the failure of the primary spillway? I've stood at the bottom of the chute in the past, and it resembles a giant ski jump. Did the spillway slab settle and crack just enough to create a lip that served as a nick point that allowed cavitation ...