First off, I am not into doing irrigation, but I have been asked to bid a job that will require a irrigation system, which I will sub out if I get the bid. The engineering firm is writing specs for a 4 head system that is supposed to cover 127,000 sqft. About 300ftx350ft +/-. Is irrigating a turf area this size possible with just 4 heads? And if so, what am I looking at as far as a total cost installed for such a system. Nameing head types and brands is going to be greek to me, I just need to know if its doable and a approximate cost for such a system. The actual specs havent been completed so I cant give specific details except the area is appox 300X350 ft and will be basicly flat, and almost square with no obstructions, with maybe a 2 or 3 percent grade (no more than 6%) for drainage. The area will be a grasspave system to use for carshows, bike rallies, ect. A best guess estimate will do for now, until I get a hold of the actual spec sheets, and then I will be looking for a irrigation contractor in/near Western NC to work with to prepare a bid. I am also interested in hearing about alternatives type systems, possible fertigation, that might be a better choice, that I can present to the engineer before he completes the spec.