Gravel, Crushed Stone, Soil and Mulch Delivery in Joliet, IL

Flat, wet prairie soil

The USDA survey maps Elpaso silty clay loam, 0 to 2 percent slopes, at the center point of ZIP 60431, with the Elpaso series making up 94 percent of the map unit. The top mineral layer is silty clay loam, dark and rich but heavy and sticky when wet. The shrink-swell rating for the top 100 cm is moderate, at 4.4 percent, so the ground moves some as it wets and dries, though far less than the most active clays.^[1]

The survey rates the soil poorly drained and places it in hydrologic group B/D. That rating means it behaves like slow-draining group D while the water table is high and like moderate group B where it has been drained. On nearly flat ground with a high water table in wet seasons, water has little reason to move, so low spots stay soggy and new yards can take a long time to dry after rain or snowmelt.^[1]

Flat ground makes small grade changes powerful. A lawn that falls just slightly toward the street drains well, while one that dips toward the house can send water to the foundation every spring. Before any project, check the fall with a long level or a string line, and correct it with Fill Dirt topped by Topsoil where needed.^[1]

Flat, poorly drained farmland is often drained with buried tile lines, and a lot built on a former field can still have one running under it. If you dig and hit an old clay pipe, it may still be carrying water, so avoid breaking it or reroute it with care. A wet patch that never dries in one spot of a yard can be a sign that an old line has failed or a new grade has blocked it.^[1]

Dolostone and limestone below

The USGS state geologic map shows Silurian System undivided at the center point, a unit of dolostone, limestone and shale of Llandovery age. Dolostone and limestone are among the most common sources of crushed stone, so the gray, angular rock in a load of #57 Crushed Stone or 3/4" Crushed Stone is close kin to the bedrock under the region. The soil above, though, formed in finer material laid over that rock.^[2]

The ground at the center point stands 620 feet above sea level, one reading for one spot. On land this flat, the height of a patio or pad relative to the lawn around it matters far more than any elevation figure, because a few inches decide where water collects.^[3]

Snow, frost and spring thaw

The NOAA normals station at Joliet Brandon RD Dam, IL, about 7 miles away, averages 38.0 inches of precipitation and 16.9 inches of snowfall a year. Snow piles at the edges of drives and walks and melts slowly in late winter, soaking the ground just as it begins to thaw. On poorly drained soil, that meltwater has little place to go unless the grade sends it away.^[4]

The station counts 126 days a year when the low reaches 32 F or colder. Its median last spring freeze is April 19 and its median first fall freeze is October 25. Water held in a base or under pavers can freeze and thaw many times over a winter, and each cycle can lift and loosen the stone. A base that drains and a surface that sheds water hold up best.^[4]

A drive and patio built for wet ground

On poorly drained silty clay loam, separate the stone from the soil and give water a way out. Strip the topsoil, shape the subgrade with a crown and lay a woven geotextile. Build the lower course with #4 Crushed Stone or 1-1/2" Crushed Gravel, which lets water pass through, then compact a layer of Road Base on top. Finish with 3/4" Crushed Stone or Driveway Gravel, and keep the edges a little lower than the surface.^[1]

Paver patios behind newer homes are a common project here. Dig past the topsoil, lay fabric, compact a thick layer of Road Base in lifts and screed a thin bed of Concrete Sand before setting the pavers. Slope the patio away from the house. Where the yard is very flat, a trench of Drain Rock along the low edge of the patio gives melt and rain a path off the stone.^[1],[4]

Sump pump and downspout outlets are worth planning at the same time. Each one can dump a lot of water onto flat, slow-draining ground. Run the outlet into a buried pipe that ends at a pad of River Rock, or into a gravel trench of #57 Crushed Stone wrapped in fabric, well away from the patio and foundation.^[1],[4]

Lawns and beds on heavy soil

New lawns on construction-graded lots often have compacted subsoil near the surface and thin topsoil. Core-aerate, then top-dress with a thin layer of Topsoil or Compost so it settles into the holes. For beds, build up with Garden Soil or a blend of Topsoil and Compost to keep roots above water that sits in wet seasons. Plant tender annuals after the April 19 median last freeze.^[1],[4]

Mulch beds with Brown Shredded Mulch or Black Shredded Mulch to keep the heavy soil from crusting and to hold moisture in summer. Along the foundation, a band of River Rock over fabric keeps roof drip from soaking the soil next to the walls. Play areas need a layer of Drain Rock under Playground Sand on this ground, or the sand turns into a puddle after every storm.^[1],[4]

Vegetable gardens do well in raised beds on this ground. Fill them with Garden Soil, or Topsoil mixed with Compost, and set them where they get full sun. The extra height lets the soil warm and dry sooner in spring, which matters when the median last freeze falls on April 19. Paths between beds stay mud-free with a layer of Wood Chips or 3/8" Crushed Stone over fabric.^[1],[4]

Newer, owner-occupied homes in ZIP 60431

The Census counts 9,272 housing units in ZIP 60431. Joliet as a whole has 53,814. Detached single-family houses make up 75 percent of homes in the ZIP, a bit above the 70 percent share for the city. Owners occupy 93 percent of the occupied homes in the ZIP. The median home in the ZIP was built in 2000, much newer than the city median of 1985. Patios, walks, beds and extra parking on newer lots make up much of the work here.^[5]

The Illinois Department of Transportation describes Aggregate Base Course in Section 351 of its Standard Specifications for Road and Bridge Construction (2022). That section governs the compacted stone layer state crews build under pavement. A home project is much lighter, but the same principle of well-graded, compacted stone over firm ground keeps it level.^[6]