I agree with the above comment, if it's a new installation and it's not to spec, the contractor should redo it at their expense. That being said, I see the options as:
1) Analyze the as-built pipe to see if it takes the design flow
2) Line the pipe (i.e. install a new culvert inside the old...
I'm wondering what kind of engineering project management software exists out there. The only ones that I know of are:
ProjectEngineer (www.projectengineer.net)
Praesto AE
Dynamic3i
Of course, there are the non-engineering alternatives like Microsoft Project, Zoho Projects, etc.
Does anybody...