Field Outdoor Spaces in Minnesota you can buy 4" steel lawn edging with spikes from most landscape supply shops. They usually offer a thinner gauge if you want curves and a thicker gauge for straight lines.
A dry riverbed can help stabilize a slope by providing a venue for water to escape, a major factor in preventing slides. This particular river may also feed an infiltration pit.
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added by Sonja Olson to Landscaping (20 hours ago)
A dry riverbed can help stabilize a slope by providing a venue for water to escape, a major factor in preventing slides. This particular river may also feed an infiltration pit.