Before installing a French drain, decide where (well away from the house) the water will be channeled to or pumped to.
Then create one or more temporary surface channels to see how well this works. For a gravel driveway the channel does not have to go across the driveway. The gravel itself is porous and water in the gravel will make its way to the channel if you selected a good location for the channel.
If the channel works in the way of carrying lots of water but the driveway is still squishy, you may install an underground pipe about 18 to 24 inches deep along that route. (Needs to be 36 inches deep for full protection against freezing.) A dry well with sump pump is needed if the pipe is buried so deep that it does not empty out at the far end by gravity flow. The pipe leading away from the driveway should be non-perforated.
If it is the base as opposed to the gravel of the driveway that is squishy then perforated pipes about 12 to 18 inches deep running at the sides of the driveway should help. They must be connected to the aforementioned or additional non-perforated pipe so water is taken someplace else.
Outdoors, draining on the surface of adequately graded land is better than underground pipes.
The disadvantages of crab apple trees. In summer, the apples are too sour to pick and eat. In winter the birds come and leave dropping all over the place.
Last edited by AllanJ; 03-11-2013 at 09:01 AM.