Gravel, Crushed Stone and Soil Delivered in Clarksville, TN

Rain and Frost Through the Year

The NOAA normals station called Clarksville No.2, TN stands about 2 miles from the center point of ZIP 37040. It averages 53.2 inches of precipitation a year, a high total spread across every season. On sloped ground, steady rain like that becomes runoff that can wash loose gravel downhill.^[1]

The station counts 87 days in an average year when the low reaches 32 F or colder. Many winter nights freeze and many days thaw, so water held in a stone surface goes through repeated cycles of ice and melt. Clean, angular stone handles that better than a dusty mix.^[1]

The median last spring freeze at Clarksville No.2 is April 10, and the median first fall freeze is October 30. Plant tender crops after the April date, and get trees, shrubs and fresh mulch in by early fall so roots settle before the cold.^[1]

Gravelly Silt Loam on a Slope

The USDA soil survey maps the center point of ZIP 37040 as Sengtown gravelly silt loam, 12 to 20 percent slopes. Sengtown is the main series, at 85 percent of the map unit. Slopes that steep mean water moves fast across the surface, and any project has to deal with grade first.^[2]

The top mineral layer is gravelly silt loam, and the survey rates it well drained, with hydrologic group B and moderate infiltration. Chert fragments mixed into silt are common in soils formed over limestone in this region, and they make digging slower but give the ground decent strength.^[2]

Shrink-swell is rated low, at 2.6 percent linear extensibility in the top 100 cm. The soil stays fairly steady between wet and dry seasons, so on this ground the main design concern is slope and runoff rather than swelling.^[2]

Below the soil, the USGS state geologic map shows the St. Louis Limestone and Warsaw Limestone, made of limestone and shale of Mississippian age. Limestone country often has uneven bedrock, and a dig may hit rock sooner in one spot than another.^[3]

Plan for surprises when digging. A trench for a drain or a post hole may run into chert, broken limestone or solid rock. Rent a digging bar along with the shovel, and set drain lines and footings with some flexibility in depth. The upside is firm support for a well built base.^[2],[3]

Moderate infiltration helps on this ground. Rain that is slowed by a terrace, a mulched bed or a stone channel has time to soak into the gravelly silt loam instead of running off. The more you break up long slopes with beds and level spots, the less water reaches the bottom of the lot.^[2]

Driveways on Steep Ground

A gravel drive on a 12 to 20 percent slope needs care. Water running down the length of a drive carries stone with it, so build in ways to turn it off. Shallow diversions across the drive, or a crown that sheds water to both sides, keep runoff from building speed.^[1],[2]

Strip the topsoil, compact the gravelly subgrade and lay fabric over any soft spots. Build Road Base in compacted lifts. On steep sections, Driveway Gravel packs into a tight surface that resists washing far better than loose round stone, and 1-1/2" Crushed Gravel holds well where tires spin or turn.^[2]

Line the uphill side with a ditch of Drain Rock or River Rock to catch water before it crosses the drive. At the bottom of the slope, where all that water ends up, Riprap or larger stone prevents erosion.^[1]

Tennessee's Department of Transportation names its standard Mineral Aggregate Base, Type A, under Section 303 of the Standard Specifications for Road and Bridge Construction (April 1, 2026). State road crews build to that section.^[4]

A Growing City of Newer Homes

The Census Bureau counts 26,100 housing units in ZIP 37040, and the median home was built in 2001. Detached single-family houses make up 69 percent of homes, and owners live in 58 percent of occupied units.^[5]

Clarksville as a whole counts 72,320 housing units, with 67 percent detached houses and a median build year of 1997. A city of mostly newer houses means plenty of new yards, side drives and patios, many on graded hillsides.^[5]

Newer lots often have thin topsoil over compacted subsoil and stone. Adding Topsoil to bare areas, building a gravel pad for a trailer or shed, and laying stone along a side yard are common first projects for new owners.^[5]

Graded hillside lots often have a steep bank between the house and the street or a neighbor. Retaining walls with Drain Rock backfill, or terraced beds held by stone or timber, turn that bank into usable space and stop soil from slumping during long, wet spells.^[1],[5]

Choosing Between Crushed Stone and River Rock

For functional areas like drives, pads and paths, angular crushed stone is the better choice. 3/4" Crushed Stone and #57 Crushed Stone lock together, stay put on slopes better than round stone and let water drain through. 3/8" Crushed Stone works well for a firm garden path.^[2]

River Rock suits drainage and decoration. Its smooth, rounded stones look good in dry creek beds, along foundations and around downspouts, and they handle flowing water well. On a slope, set River Rock in a channel with larger stones at the edges so it stays in place.^[1]

Many yards here use both: crushed stone where people and cars move, River Rock where water moves. With 53.2 inches of yearly rain, a well placed channel of River Rock can save a lot of erosion on a sloped lot.^[1]

In the end, the right choice comes down to where water and traffic go. Walk the lot during a heavy rain and watch where water collects and runs. Put crushed stone on the paths people and cars use, and put River Rock in the channels water follows.^[1]

Beds and Mulch on Sloped Lots

Gravelly silt loam can grow good plants once loosened, but on slopes the topsoil is often thin. Build terraced beds and fill them with Garden Soil or a blend of Topsoil and Compost. Terraces slow runoff and keep soil from washing downhill.^[2]

Shredded mulch is the right cover on a slope. Brown Shredded Mulch and Black Shredded Mulch knit into a mat that stays put in heavy rain, while chips and nuggets slide downhill. Spread mulch after the spring freeze date and top it up in fall.^[1]

Lawns on slopes benefit from a thin topdressing. Spread Topsoil or Compost lightly over thin or bare patches, rake it in, and seed in early fall, when rain is steady and the soil is still warm. Avoid thick layers on a slope, which can slide in the next storm.^[1],[2]