Lake silts, shade, and park-strip trees
On the valley floor — most of central and western Orem — the ground is old Lake Bonneville sediment. Silts that compress when they are soaked, and clays that shrink in a dry August and swell when the sprinklers run, are both in the mix. The pattern we hear most is simple: a panel was fine, a sprinkler head broke or a gutter came loose, and later that panel is low.
West Orem, toward Geneva Road and the old mill ground at the Vineyard line, is lower and closer to the lake. Moisture hangs on longer. Garage slabs and long driveways that puddle at the street are a familiar west-side complaint.
The east bench, climbing toward the Timpanogos foothills, adds slope. Water from the mountain side of the lot wants to cross the driveway. If it crosses underneath, the downhill panel settles. Many ranches up here still have the original broom-finish driveway, cracked at the control joints but otherwise solid. That is a good lifting candidate. A driveway whose surface has scaled to exposed rock from decades of de-icer is a weak one: you can lift it and still have a rough, raveling surface.
If a sidewalk square has a sharp tent in the middle, a root is probably lifting it, and mudjacking will not flatten that tent. If the square dropped along one joint and the tree is a panel away, lifting is more realistic. Whoever quotes it should be willing to say which one they are looking at.