Search results for query: *

Thanks for your reply. Followup question, how would you determine the flow above the system? I have to compare the storm water flows before and after the development.

I am designing a small residential underground detention basin and would like to have the only catch basin also be the outlet in the event of large storms. There is no realistic safe place to discharge it on this small lot, and the existing runoff just flows off the driveway anyway, so this...

Enter the entire system as an above ground basin with a void percentage. Then add in the exfiltration value located in the pond inputs. You should either do a field percolation test or get a lab to test for the permeability.

Thanks for all of the constructive comments. Here is a little more info if it helps: The wall was constructed with 6x6 P.T lumber and stacked it like a typical residential railroad tie wall. Every 10' he installed 2 perpendicular ties back to a 3' long 6x6. I am exploring to see if I can add...

I have a friend who went ahead and built a 5' high railroad tie wall without any permits. Well, the town got involved and now obviously wants it certified by an engineer. It was built with almost no reinforcement. Any suggestions on how to reinforce the wall sufficiently? I can't find any...

I don't have a collection channel to discharge to. The system is located on the side of hill where all storm water sheet flows down. That is what makes this tricky.

Its not uncommon to have to design a stormwater system where you have to divert off-site stormwater around a site. For example, I am designing a site on the side of a mountain where, for storm quality purposes, I have to divert all runoff coming down off the hill around the site. The problem is...