Sinking front lawn - Knowledgebase Question

Westerville, Oh
Question by jstu83
June 1, 2010
Hello! My husband and I built our home in 2007. We are VERY inexperienced at lawn care. After this year's snow melted, we noticed a large slope ranging from the top of our lawn all the way to the sidewalk. We have no idea where to begin fixing this and if there are other concerns we should have when this happens?


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Answer from NGA
June 1, 2010

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If the area is actually sinking and is larger on one end than the other, there's a problem with drainage which is causing the soil beneath the lawn to erode. This might be due to a high water table, a broken pipe, or mis-directed runoff from rain. It might be that an old tree stump was left below ground level that rotted away and took some of the soil with it, or it may be that you have a broken pipe or an underground stream. I can't really suggest fixes without being able to do some investigation. Since you built the house you should have drawings indicating the water lines, sewer or drainfield lines, etc. If any are in the general vicinity, that's a good place to start digging and investigating. If nothing of concern is in the general area, a high water table, underground stream or poorly compacted soil might be the cause. I wish I had more insight to offer. You may need to contact a professional to come out and inspect the site. If it is simply that the soil was not adequately compacted you can probably dig up the turf (roll it up like sod(, fill the lower area with topsoil, tamp it down and re-lay the lawn. The roots should establish quickly. Hope this is all you need to do!

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