I am trying to build French drain/trench drain about 150 feet on right side of property and about 150 feet on back of property. I am trying to divert the rain water away from my property towards open lot on left hand side as my property downhill compared to properties on right hand side and back of properties.  I am unable to find any good contractors for this for last many months in Atlanta area. How to go about find good contractors or companies for this type of work at reasonable price.  I am not sure what stone or sand or dirt to order either. Please advise