Answer: Solving drainage problems is not an easy task! Now that you've gotten rid of the grass, you'll need to make improvements from the ground up before installing the river rock. First aerate the soil to reduce compaction and follow with a 6-inch-thick top dressing of fine compost for mild drainage difficulties, or fill low spots with sandy, fast-draining topsoil. The cover the area with weed barrier and place your river rock over this. Or, you can lighten the soil texture in your yard by rototilling in topsoil, compost, and other organic matter; then smooth the prepared soil and lay weed barrier, then your river rock. Best wishes with your new project!
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