Finally had some time to stop and get a decent video of this awesome irrigation system behind Lane Southern Orchards. If you love watching those "retro" brass impact sprinklers still being used for one of their original applications, then sit back and enjoy the show!
This is the portable (or "hand move", as it's called in the industry) irrigation system that's put into place around the first week in July each year to water a special little cornfield behind Lane Southern Orchards in Fort Valley, Georgia. This small cornfield will eventually become Lane's highly popular corn maze that they open up during the month of October, which coincides with the kickoff for harvest season for the bulk of row crops grown in the area. Each year between June and July, they plant the field with corn using GPS-guided equipment, and come late-September they begin grooming the crop canopy to resemble an image as seen from overhead, which forms the maze itself. The images are typically themed for different causes (i.e. breast cancer, Downs syndrome awareness, etc), and at least a large portion of the proceeds from the maze will go toward one or more nonprofit organization that the field is themed after to help with their cause.
Now onto the specifics about the irrigation system itself!
The original setup was once mostly Rain Bird 30WH and WeatherTec 10-30D brass impact sprinklers, but now also includes a growing handful of Senninger 5023 thermoplastic impact sprinklers to replace the old brass heads as they break down. The sprinklers are all mounted on 8-foot tall PVC riser pipes that are tied off to T-posts for stability, and are fed by a 3" aluminum pipeline laid along the ground with outlets spaced every 40 feet. The lateral lines are spaced approximately 40 feet apart, with staggered sprinkler placement from one lateral to the other to make a triangular spacing pattern for the sprinklers. The closest one that I zoom in on at least once is one of only a couple WeatherTec 10-30D brass impacts, while the other brass impacts found randomly in the system are Rain Bird 30WH heads. The pump can only supply enough water to run two laterals at once, which is why if you look closely toward the end, you can see a ball valve at the point of connection for each lateral line where it feeds from the underground supply line. They usually switch out which set of laterals runs each day, and as far as I can tell they pretty much run them all day long.