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  1. #11
    Veteran Member
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    Mar 2004
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    2,428
    Location
    Central Ma.
    Tractor
    7275 Cub Cadet

    Default Re: Burying plastic culvert pipe

    Here's the area that I need to put the culvert pipe into. I just measured the height of the road from the bottom of the ditch. The ditch is only 32" deep. It is a little bit short of the 36" minimum that I need for a 24" pipe. I will have to dig it out a little bit to get at least a 12" cover over the top of the pipe. I was hoping that I wouldn't have to dig it out. Oh well, at least I have until next summer to dig it deeper. I cannot mess with this now as the water runs into a drinking water resevoir. I do believe as mentioned by Egon that the secret to success is to campact the soil as much as possible around the pipe to shift the load to the banks instead of the pipe. I won't be using this road for at least a year after it is done. I want it to settle fully before driving over it. I do have the proper permission from the Con Com, DCR and Highway Dept. to install this pipe.
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    Cub Cadet 7275, FEL, RFD2584 mower, Box Blade, Scaper Blade, York Rake, Snowblower, Rototiller, Stump grinder, Wood Chipper and a Post Hole Digger.

  2. #12
    Gold Member
    Join Date
    May 2006
    Posts
    266
    Location
    NE TX
    Tractor
    Long LongTrac

    Default Re: Burying plastic culvert pipe

    Not sure if waiting for it to settle will help. I installed my 18" steel culvert in a 2.5' deep ditch, with regular dirt. Compacted it by dumping about 4" each time then driving over it a lot w/ tractor. Stopped after 12" of cover, then a few inches of rock on top just to keep from getting stuck. About a week later semi's and two 10 yard concrete trucks were driving over it. I was told the 10 yard concrete trucks weighed about 79,000 lbs. Never had a problem.

  3. #13
    Veteran Member
    Join Date
    Mar 2004
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    2,428
    Location
    Central Ma.
    Tractor
    7275 Cub Cadet

    Default Re: Burying plastic culvert pipe

    Charlie,

    Thanks for the info. I'm in no hurry to access this section of our property other than to pull cordwood off of it somtime in the summer of 2007. I figured it would be settled in by the time I need to get in there.
    Cub Cadet 7275, FEL, RFD2584 mower, Box Blade, Scaper Blade, York Rake, Snowblower, Rototiller, Stump grinder, Wood Chipper and a Post Hole Digger.

  4. #14
    Super Member _RaT_'s Avatar
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    Apr 2000
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    5,815
    Location
    Northern CA.
    Tractor
    none, nothing, nada

    Default Re: Burying plastic culvert pipe

    Quote Originally Posted by JimR
    Here's the area that I need to put the culvert pipe into. I just measured the height of the road from the bottom of the ditch. The ditch is only 32" deep. It is a little bit short of the 36" minimum that I need for a 24" pipe. I will have to dig it out a little bit to get at least a 12" cover over the top of the pipe. I was hoping that I wouldn't have to dig it out. Oh well, at least I have until next summer to dig it deeper. I cannot mess with this now as the water runs into a drinking water resevoir. I do believe as mentioned by Egon that the secret to success is to campact the soil as much as possible around the pipe to shift the load to the banks instead of the pipe. I won't be using this road for at least a year after it is done. I want it to settle fully before driving over it. I do have the proper permission from the Con Com, DCR and Highway Dept. to install this pipe.
    The ADS site is very clear on exactly how to do this. I am in the process of replacing several hundred feet of 15" N12 in our community. I reviewed the coverage pretty thoroughly and am still confident that with the occasional truck and 20,000 lb backhoe driving over the pipe I will be OK. I installed some 24" N12 a couple years back and did not bother to look at the ADS recommended fill/compaction information. I filled to about 2/3 of the pipe height with pea gravel and then DG (decomposed granite) over that. I have yet to see any appreciable depression in the road even after many trips over it by very heavy trucks. The N12 pipe is very tough and durable, much more then the equivalent in steel.
    No government ever voluntarily reduces itself in size. Government programs, once launched, never disappear. Actually, a government bureau is the nearest thing to eternal life we'll ever see on this earth!

    Ronald Reagan

  5. #15
    Elite Member tallyho8's Avatar
    Join Date
    Aug 2004
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    3,452
    Location
    Katrinaville LA west of Westwego east of Ama south of River Ridge north of Boutte, above sea level
    Tractor
    Kubota L4400, Kubota ZD326

    Default Re: Burying plastic culvert pipe

    In our area the bottom of the pipe has to be level with the bottom of the ditch. If it is lower, it will retain stagnant water for mosquitoes to breed in or just fill in with sediment making the pipe's volume less than required by the code.

  6. #16
    Super Star Member
    Join Date
    Sep 2000
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    10,827
    Location
    Triangle Of North Carolina
    Tractor
    JD 4700

    Default Re: Burying plastic culvert pipe

    Jim,

    Is a 24 inch pipe large enough? I have either an 18 or 24 inch pipe. Can't remember which since I got it for free. When I installed the culvert 6 years ago I read up on how to install them as well as size the culvert base on the amount of water that would flow throught the water shed. I'm lucky in that the culvert is withing 30-50 feet of the crest of a hil so very little water flows through the piple. Also a larger pipe was easier to clean out if required compared to a smaller pipe.

    My origional plan to install the culvert was to dig down abit with the backhoe to place the pipe. Reality hit and I did not have time so I just laid the culvert on grade following the natural water flow. This has worked out fine. It may have caused problems if I had high flow rates. I also put in rip rap to stabilize the road bed.

    Later,
    Dan

  7. #17
    Super Member _RaT_'s Avatar
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    Northern CA.
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    none, nothing, nada

    Default Re: Burying plastic culvert pipe

    Quote Originally Posted by dmccarty
    Jim,

    Is a 24 inch pipe large enough? I have either an 18 or 24 inch pipe. Can't remember which since I got it for free. When I installed the culvert 6 years ago I read up on how to install them as well as size the culvert base on the amount of water that would flow throught the water shed. I'm lucky in that the culvert is withing 30-50 feet of the crest of a hil so very little water flows through the piple. Also a larger pipe was easier to clean out if required compared to a smaller pipe.

    My origional plan to install the culvert was to dig down abit with the backhoe to place the pipe. Reality hit and I did not have time so I just laid the culvert on grade following the natural water flow. This has worked out fine. It may have caused problems if I had high flow rates. I also put in rip rap to stabilize the road bed.

    Later,
    Dan
    Dan, the ADS site, you can go to a sizing calculator to help determine how large your pipe should be based on things like acerage of watershed.

    Agriculture Drainage Calculator
    No government ever voluntarily reduces itself in size. Government programs, once launched, never disappear. Actually, a government bureau is the nearest thing to eternal life we'll ever see on this earth!

    Ronald Reagan

  8. #18
    Super Star Member Egon's Avatar
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    Aug 2001
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    19,189
    Location
    Nova Scotia, Canada

    Default Re: Burying plastic culvert pipe

    Dig out the culvert area about a foot below the finished culvert level. Fill this area in with crushed stone and pack it well to for a pad for the culvert to sit on. The pad should be about 4 to 6 feet wide for the two foot culvert.

    This pad gives you a firm foundation to work from for the rest of the backfill and compaction.

    If you can size a culvert for the drainage conditions you would not be asking non certified people like me questions.
    Egon
    50 years behind the times
    Livin in a
    Worn out skin bag filled with rattlin bones

  9. #19
    Super Star Member
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    Oct 2004
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    16,854
    Location
    First organized permanent settlement in the northwest territory
    Tractor
    2003 Kubota BX1500/2004 Kubota Bx23/2005 Kubota BX1500

    Default Re: Burying plastic culvert pipe

    Quote Originally Posted by tallyho8
    In our area the bottom of the pipe has to be level with the bottom of the ditch. If it is lower, it will retain stagnant water for mosquitoes to breed in or just fill in with sediment making the pipe's volume less than required by the code.
    If the water constantly flows along the ditch it will not become stagnant even in in a low spot.
    Tractors 2003 Kubota BX1500 / 2004 Kubota Bx23 / 2005 Kubota BX1500.
    Attachments 60'' Front Blade/48'' Rear Tiller/FEL/Back Hoe /
    60'' MMM/Clamp on Forks/48'' MMM
    South of Canton Ohio L .B

  10. #20
    Super Star Member
    Join Date
    Oct 2004
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    16,854
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    First organized permanent settlement in the northwest territory
    Tractor
    2003 Kubota BX1500/2004 Kubota Bx23/2005 Kubota BX1500

    Default Re: Burying plastic culvert pipe

    Quote Originally Posted by tallyho8
    In our area the bottom of the pipe has to be level with the bottom of the ditch.
    Bad idea with ditches that are to deep.
    Tractors 2003 Kubota BX1500 / 2004 Kubota Bx23 / 2005 Kubota BX1500.
    Attachments 60'' Front Blade/48'' Rear Tiller/FEL/Back Hoe /
    60'' MMM/Clamp on Forks/48'' MMM
    South of Canton Ohio L .B

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