My problem is that we have a long area of gravel used for parking for myself and several neighbors. When it rains really hard, the gravel alongside the road washes away and becomes a real danger for tires and probably the road itself. After googling (ducking, actually) the best way to avoid gravel washing away, it seems a French drain is the best method to do this. Only part of the lengthy gravel area is affected.
I'm wondering if I can just install a partial French drain for the affected area and leave the unaffected as is or if the lower French drain would cause the upper area to become affected. I don't have to dig to install the French drain on the affected area because I can just fish the gravel out and lay the perforated pipe in so I could do this in a day. However, if I have to do the upper part it will take considerably more time and effort to call 811, dig through at least a foot of gravel and lay it throughout the graveled area.
Also, I have been just going to our local rock quarry and getting crusher run 47 by the 5 gallon bucket which typically only costs about $6 when I get 5, but I have to make multiple trips. This happens at least 3-5 times a year.
There is a low spot, probaby 8-10 inches right under the red car and about 5 feet behind the red car. The area by the back car that has the lip of the road is barely affected. I've only ever put gravel there once.