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The depth of your decomposed granite depends on its intended use, but around 3 to 4 inches is the most common depth. Driveways that need to support a lot of weight should be at a depth of no less than 6 inches. Walkways that won’t see a lot of weight but lots of foot traffic should be built at a depth of 3 to 4 inches, and patios should also be between 3 and 4 inches deep.

There are a few factors to consider when choosing the right size river rock for a landscaping project. First, think about how you’ll use the rocks. For example, if you’re installing them as part of a water feature, medium-sized stones (ranging between 2 and 5 inches) often work best. Smaller rocks (from 1 and 3 inches) are better for walkways and pathways, while a mix of medium and large stones (between 3 and 8 inches) is ideal for garden beds.

If you decide to DIY your boulder removal project, you’ll want to wear work gloves and protect your eyes if you decide to break the boulder into smaller pieces. Wear a lifting harness and focus on lifting with your legs to prevent back injuries. If you’re digging around a large boulder or using heavy machinery to get underneath it, make sure there are no utility lines nearby.

To prepare your yard for river rocks, smaller rocks may require laying landscape fabric to keep the stones from sinking into the ground while encouraging proper water drainage. You should also clear the land of weeds and larger boulders and, in some cases, test the density of the soil to ensure it can handle the weight.