MATH HELP: Culvert pipe capacity in gpm | Page 6 | Construction and DIY projects | Forums

One problem I do not yet have a solution for is getting the clay dirt fill from the pond excavation site to the stream crossing. The reason that this is a problem is that it is a lot of dirt to move and there is no way I see to get a dump truck across the stream bed to the pond location.

The stream crossing will need 522 cubic yards of clay dirt fill.

• That is 31 truck loads by a large 17 to 18 yard dump truck.
• It is 105 truck loads by a small 5 to 6 yard dump truck.
• The average front end wheel loader can carry 1 to 3 yards which would be 174 to 522 trips.

Even with a raw cut driveway, I do no know how the stream bed could be crossed by a dump truck.

Any ideas?

KVR said
how deep is it?

Good question. I don't know. I will need to take measurements and try to get good pictures to illustrate, but I've not been getting out to the property as much as I'd like to lately. To hazard a guess, The south side is maybe a 3 foot drop and the north side is maybe a 1 foot drop.

KVR said
just posted on your video thread, if i can make it out to our land in the next couple days, I'll take some pics of our culverts, I think you can get away with a much smaller culvert if the video is a good representation of the water depth, our streams are pretty comparable, I don't think our culvert is that large and we get quite a bit of flow off the mountain

I am very interested in any pics or vids of your stream and culverts.

My big cost gotcha is not diameter as much as it is length. The 42, 48, and 54 are roughly 600, 800, and 1000 respectively. I thought at first I'd only need 3, but need 6 instead.

• 600x3=1800 vs 600x6=3600
• 800x3=2400 vs 800x6=4800
• 1000x3=3000 vs 1000x6=6000

While the video is representative of the typical flow, there are tell tale signs of the water going several feet deeper at one time or another, and it is the larger events that worry me. Most of the time the culvert will be waaaay too big. I'm not planning for that. I'm planning for when it rises to the high water indicators from past flooding.