Water shed-I have a 30 degree driveway about 1\3 mile long.When it rains I get a torrent of water to the hiway below. Answered
I have installed 4" cross drain pipe with stocking and ducting, but the clay slit covers the large gravel and the water goes over them. I'm considering a swale with large rocks down the water paths. any helpful suggestions of construction before i spend more money.