re: French drain system

Just dig a ditch.

We hired a company to dig out behind our retaining wall and put in a system like that with 2 catch basins and two runs of pipe. The issue is my neighbors property is higher ground than mine and alot of water comes off his driveway down my bank and was running over my retaining wall and flooding our yard. The pipe system didn't do shite. The water didn't find it's way into the pipes and nothing pushed it in the direction it should've went. The water went down further behind the wall and was pouring out of the bottom of the wall. I solved all that buy pulling out that crap system and poured me a concrete ditch running to the back of the property.