Building 6' long road over concrete

I have a situation where I have concrete poured for a scale base in a roadway. The scale isn't ready to move, so I will have to temporarily fill 13" deep, 6' long to get to the grade of the final road surface. The rest of the road will be built up with dirt, and topped with 1 1/2-. My question is the area with the concrete underlay (also concrete boxed on sides as well). I think in case of rain the water will be unable to drain through and may make that portion of the road unusuably soft. Any suggestions on what to use? Asphalt isn't available. I may just try a solid pack on the clay with extra slope to get the water off. That will work good for heavy rains, but a day long slow rail will still soak in.

What is your plan for drainage after the scale is in place? If it'll be a couple months or less I'd probably fill it with road base, water and compact it well, and give it a good crown.

your concerns are warranted. anything over concrete will pump given enough time water and mechanical action. The crown mentioned above will help with that.

AMBMike said: What is your plan for drainage after the scale is in place? Click to expand... As Mike said, is there some kind of drain in the bottom? If yes, how about a layer of drainage stone and a membrane, with your dirt compacted above?

Could core/hammer drill a lot of holes before putting rock down...?

Fill it with rock.

Road plate like what is used over an open excavation ?

DDoug said: Road plate like what is used over an open excavation ? Click to expand... This is a good plan if you can source some heavy steel plate. It may need some blocking in the center.

AMBMike said: This is a good plan if you can source some heavy steel plate. It may need some blocking in the center. Click to expand... I was thinking the OP would still fill under with dirt/gravel. IIRC you can rent road plates YMMV.

What about a cattle guard type of set up? Custom Steel Cattle Guards | Maverick Metal Design | Alberta Generational quality cattle guards produced in Alberta. We use recycled materials that allow us to produce exceptional products for exceptional prices. www.maverickmetaldesign.com

3 maybe 4 inch rock - no fines, will drain and won't pump. A vibratory steel drum roller will make it decent to drive over.

DDoug said: I was thinking the OP would still fill under with dirt/gravel. IIRC you can rent road plates YMMV. Click to expand... Came here to post that. Fill with DGB and put a road plate on top. They have a location in KC. Road and Trench Plates | Trench and Traffic Safety Equipment Sales, Rentals, Training Steel Road plates are a must-have on construction sites because they make things safer for workers and the local community. www.ntsafety.com This is who we use to plates and trench boxes.