by chostetler » Fri Oct 07, 2011 5:40 pm
Ok, figured that out. Find the culvertn.dta file under C:\Users\username\AppData\Roaming\Carlson Software\Carlson20XX\R18.2XX\USER Add n value, HDPE, 1. The last value is 0 for concrete, 1 for plastic, and 2 for metal.