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Athletic Fields Project

Discussion in 'Irrigation' started by JeffY, Jan 15, 2006.

  1. JeffY

    JeffY LawnSite Senior Member
    Messages: 324

    With the unseasonably warm weather we've had, we've been able to install sprinklers at a magnet middle school here in omaha. A company that specializes in renovating and building premier athletic fields are putting a crown on the field. The company has been hauling in dirt and rough grading it. Then, we're able to instal the PVC and stub poly lines out of the ground where the heads will be located, and then backfill the lines. The grader is then coming back on site and grading the field back smooth.

    Also, we're installing heads around the track to keep the area green. The track is going to be expanded in the near future, so we trenched our lateral lines about 15' from the track and install poly from the pvc back to the track so when they do expand the track, it would be minimal renovation to move the heads in.

    There is also a soccer field being built nearby, and we're running our 4" main 600' to supply it. Another soccer field is going to be installed in the near future between this soccer field and the football field. To save time and headaches, we're going to go ahead and install a "tee" where we think the middle of the new soccer field will be and put in an isolation valve.

    We just got a notice to bid on installing sprinklers around the high jump, triple jump, long jump, discus, and shot put fields. These have not been added yet. This project looks very intensive and can't wait till it's completed. We just started on it last week, 1/9/06. We are completed on the football field, have a little bit left to do on the perimter of the track, install the supply from the POC to where all the spurs will be located, and get started on the soccer field.

    I will get some pictures on here as soon as I resize them.
  2. JeffY

    JeffY LawnSite Senior Member
    Messages: 324

    Picture 381: A view of the field after it had been rough graded. The 4" pipe in foreground is the sleeve for our mainline that goes under the track.

    382: Another view of the field.

    383: Getting started on the trenching. We opted to go with a riding trencher, a RT40 ditch witch, with a 6" chain to help speed things up. It was a brand new machine at our rental place, had only 4 hours on it when we got it. We're now up to 20. We started with with a trencher along the inside of the entire track.

    388: Laying out the pipe along the side of the trench. We had at most 5 heads on a zone with a central distribution feeder if possible. Our supply was 2" copper at POC. We went to 3" PVC under the driveway to a section of dirt between drive and track, and kept the 3" under the track. Once inside the field, we went with 2 1/2" mainline feed for the valves. From the valves we ran 2" to the middle flag, then sized down to 1 1/2" past the next set of flags, then finally 1" to the last flag.

    390: Trenching the middle of the field. For the field, there were 10 zones, but we installed 12 valves. The two valves were supplying the zones on the outside of the track to keep it center feed.

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  3. JeffY

    JeffY LawnSite Senior Member
    Messages: 324

    394: Trenching the supply lines to the zones betwen the football field and track. All our PVC had to be more then 16" below the ground due to the type of vibrating/aeration that the field guys use to shake/loosen up the soil. So we had to be 18" to 24" below the top of the soil.

    395: A view from the top of the hill on the south west side of the track looking down.

    398: Another view of the middle of the field.

    399: A different view from the south east side of the track. Where the first guy in the black jacket is at gluing the supply lines, there are two trenches. One goes to the zone between the track and field and looks like a cross. The other is just a feeder to the zone along the track.

    403: The two trenches width-wise across the field are the supply trenches for the zones in the middle of the field. We dropped two pipes in one trench so one trench was caring the supplies from two valves.

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  4. JeffY

    JeffY LawnSite Senior Member
    Messages: 324

    408: One zone done along the track. You can see the poly lines sticking up where the heads will be located.

    409: A picture of the valve hooked up to that zone.

    413: A large hole we dug between the driveway and track. The two pipes you see in the front of the picture in the bottom of the hole are our 4" sleeves for our 3" main. The trench up top on the left is for our 4" main line that will feed the soccer fields up on top of the hill. The trench on the right is for the 2 1/2" mainline that will feed the valves along perimeter of the track. And the same for the trench on the bottom of the picture.

    414: A view of the three trenches leading from the hole down along the track. In this one, the one closest to the track is the lateral trench lines for the heads.

    418: A view of the two pipes going into one trench. We dug about 10" back to get enough slack to be able to set the pipes in the trench without a possibility of blow-outs from bending the pipe too sharp into the fitting.

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  5. Dirty Water

    Dirty Water LawnSite Fanatic
    Messages: 6,794

    The R40 is a good trencher, we have its older brother, the 3500, though we have put 1400 hours on ours.

    Good job on use a the TOE nipple instead of a male adapter on the 2" valve...Everything looks pretty good.

    I'm guessing your going to use Hunter I-25 heads judging by the 1" poly swing joints.

    When we do I-25's, we use a SCH 80 nipple and 3 marlex el's for a swing joint instead of using poly...but its just a matter of preference.
  6. JeffY

    JeffY LawnSite Senior Member
    Messages: 324

    423: How the two valves are installed for one trench. The trench is 6" wide, and so we installed the valves from the middle of one outlet to the other was no more than 6" wide.

    428: View of the trench that will care the feeder lines to the opposite side of the track.

    441: Almost done with the interior of the field as far as installing pipe.

    451: Putting in the 2" and 2 1/2" supply lines for the middle zones. The 2" lines feed to 4 head zones and the 2 1/2" lines supplied the 5 head zones.

    453: Just a picture of progress on the north side of the field.

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  7. Dirty Water

    Dirty Water LawnSite Fanatic
    Messages: 6,794


    We don't typically space large valves like that so close together, because if you have to remove it, you can't spin it off without dissasembling it first.

    Often I'll use two 45 degree fittings on the output of one valve to bring the line into a trench, and have the other valve go directly down the trench.
  8. JeffY

    JeffY LawnSite Senior Member
    Messages: 324

    466: Valve box in place and area ready to be buried.

    472: A view on top of the hill to where the soccer field is going to be. In the distance is the soccer field that we'll be installing a sprinkler system in as soon as we complete all the work down below. There will be a field installed between the soccer field and track. Since there is a major gas pipeline that runs along the side of the track, they can't cut and pull the dirt so they have to install and grade dirt approximately about 5 feet high than on the side where the storm grates are in order to have a level field.

    473: A picture of the grader in action on the soccer field.

    475: Standing south of the track, seeing half the lines backfilled and compacted.

    477: A closer shot of the backfilled lines.





  9. JeffY

    JeffY LawnSite Senior Member
    Messages: 324

    Yes, we'll be using I-25s. The reason for the poly is that the grader is going to back on the field to smooth it out. I'm glad we did, because after we had the grader on it, he ignored our recommendations to be careful of the poly so we would know where our heads our and instead sheared all the poly lines off. I still have about 2" off poly left so I know where they are to be located. We've had success the past 5 years of using poly as our "swing joints"
  10. tiedeman

    tiedeman LawnSite Fanatic
    from earth
    Messages: 8,745

    wow!!! What a project

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