For much of the way, Imperial Highway is signed as State Route 90. A de facto freeway portion of the route in Yorba Linda is also known as the Richard M. Nixon Parkway. The portion in Los Angeles County is located about one mile north of, and runs parallel to, Rosecrans Avenue.
Are areas of your lawn bumpy and uneven? When you walk across these areas does the soil sink or feel soft? If so, some type of soil dwelling critter is probably the cause. During winter the activity of moles, earthworms, and mole crickets can cause mounds and tunnels in lawns that result in uneven or rough patches. To fix these problem areas you must first diagnose which critter is causing the damage. Earthworms.
Use mounds to arrange plants in tiers or add height for privacy. Landscape mounds, also known as berms, improve drainage in soil and raise plants to provide greater privacy in flat garden spaces. A berm is suitable for a rock garden or drought-tolerant plant bed, and it gives plants that well-drained soil to grow in.. Spread clay soil over the filler material, unless you plan to plant trees, to hold the basic shape of the mound together. Clay is thick and sticky, making it less likely to erode during rainfall or watering. Use your judgment to determine the thickness of the clay layer.