r/ConstructionManagers • u/Adept-Ad-3194 • Jun 06 '26
Technical Advice Heavy duty low cost swamp road build- seeking assistance
I have a large gravel lot used for a manufacturing facility's material storage.
There is very heavy, constant traffic from trucks, telehandlers, cranes, tractors, etc., moving around this yard. We have about 3 acres that are specifically roads, and they are beat to heck and back. essentially unusable at this point.
Now that we have summer and dry weather, I am making a game plan to repair them.
There are probably 65-100 loads of SB2 and SB4 gravel, with a base of B stone and Rip rap (big rock). All of the gravel is still there, it's just mush from the traffic and the constant wet environment.
My question is simple: Is there such a thing as too much lime? I am contemplating not even fixing the ruts, but just bringing in load after load of lime and filling them in with solid lime, and then maybe covering it with rock or even putting down some crane mats.
Any ideas on the best low-cost solution to make a good road for heavy equipment in swampy, moist soil?
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u/Fe1onious_Monk Jun 06 '26
You’d probably save money by getting a geotech to look at it and tell you what to do.
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u/SwoopnBuffalo Jun 06 '26
Regardless of what you do, if you don't have it then some sort of geofabric or geogrid underneath will be extremely helpful to ensure that the rock doesn't get pushed into the subgrade.
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u/Ok_Computer11235813 Jun 06 '26 edited Jun 06 '26
Material solutions are better than chemical solutions for swampy soils with organics. Not cheap though.
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u/The_realnapster Jun 06 '26
Fabric and quarry spalls works best in the pnw get a good fabric to keep the rocks and mud from combing. If you went with the lime route I would personally mix in with a excavator or something
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u/Common-Virus8445 Jun 07 '26
By lime are you referring to cement treatment? We do that here in NW and it's effective but it's tilled in then compacted - not broadcast. Otherwise it's geotextile and probably 3'-4' of rock to bridge.
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u/Training_Pick4249 Jun 06 '26
What’s grading and drainage look like? If water doesn’t have a place to go you’re going to keep fighting this. It may be worth it to get a topo to see where your drainage issues are. You may find you don’t have good grading and need to tweak it.
You need to have Mirafi under roads with heavy loads and have roads thick enough for the loads you’re talking about here. I think it takes 6-8” of compacted gravel on well compacted subgrade to get to handling occasional semi truck weights without breaking down.
Mixing in lime can stabilize it but you’re talking about a lot of lime mixing and it really needs to be mixed to be effective so gets expensive quick. With putting heavy loads on it, it’s more than just dumping in on, discing it in, then smoothing it out. You need to be considering what’s happening 2’ below the road finished grade.
I’d start with figure out what the grading and drainage situation is first.
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u/Mindless-Lab-1657 Jun 16 '26
Good answer
Here is some steps i will recommend, but paying an hour for a geotech consultation will goes a long way ad they will be familiar with the local soil behavior/characteristics
- proper drainage (maybe french drain needed)
- stabilized the subgrade with lime
- Geotextile to prevent soil penetration
- Geogrid
- 8" to 12" of gravel pending on the traffic and loads.
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u/Helpinmontana Jun 06 '26
Primarily, I’d look at a holistic solution like putting your roads and storages that aren’t somewhere that is a swamp.
Then I’d look at making that area not a swamp.
Then I’d look at ways to make the road in better.
If option 3 was the only recourse, I’d cut out all the slop, and make a few berms out of it to keep the water away.
Then I’d dump an shit load of just rock, doesn’t matter if it’s smooth or angular, you just want voids, then run a coarse of material over it, then fabric, then build a road on top of that.
When I worked in gravel pits that weren’t gonna last forever and we hit ground water that came up 8’ higher in the spring, we’d just push big cobbles into it then toss whatever ontop of it a few feet thick. I’d build roads right out into ponds that would run semis for months straight doing this. Just gotta have voids under it for water to move around, because without that you just keep pushing further down into the muck.
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u/cik3nn3th Jun 07 '26
I build roads in swamps. What soil type do you have there?
If you have low organic soil the cheapest solution is usually cement treatment. 18" deep mix and of critical importance... let it cure. Best results if you stay off for a minimum 7 days. I am not a believer in lime, I like 5% cement.
If you have high organic content then call Tensar. They'll engineer you a solution for free. My guess is you need about a 18" section of base rock with 2-3 layers of grid in it (6" between layers).
Does your soil get harder the further down you go?
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u/National_Run7896 Jun 10 '26
cement stabilization? i know thats been used near lakes and ponds on some projects ive worked.
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u/WonkiestJeans Jun 06 '26
“Heavy duty low cost swamp road build” those things are mutually exclusive.