This may seem a pretty silly question but I'd like to hear about some techniques for running irrigation lines under multiple sidewalks. I have an RFP on a larger commercial that will require crossing under dozens of existing sidewalks. Our company is not yet prepared to do this many sidewalk crossings efficiently.(is there a machine we should buy or rent?) The soil texture is anywhere from sandy loam to clay and this is causing an issue on bidding this property properly. The sidewalks are no greater than three-four feet in width. Pipe size would be 1.5 inch at most. Any suggestions would be appreciated. Thank You.