Asphalt Paving in Jackson, MS

Asphalt paving in Jackson has one problem that most cost guides never mention: the clay underneath. Much of the Jackson metro sits on Yazoo clay, which swells when it soaks up water and shrinks when it dries out. The city also averages about 57 inches of precipitation a year, well above most of the country, with dry stretches in between. Asphalt laid thin over that ground cracks, heaves and potholes early. Asphalt built on a properly prepared base can last for decades.

Why Jackson pavement fails

Yazoo clay is a montmorillonite clay, a mineral that changes volume dramatically with moisture. The Mississippi Department of Transportation has said Yazoo clay can expand to take up about 400 percent more space when wet than at normal moisture. When it dries, it pulls back and leaves voids under the pavement, and traffic eventually breaks the unsupported asphalt into cracks. A 1988 report from the state's Bureau of Geology named the clay's expansion as a primary cause of foundation and structural damage in the Yazoo clay belt, especially in Jackson.

You can see the result on city streets. In 2015 the mayor declared a state of emergency over potholes and water main breaks, with repairs estimated at $750 million to $1 billion. A Jackson State University engineering professor told the Jackson Free Press that when a road's subgrade is not stabilized, rain and heavy loads make it "rapidly deform and deteriorate," and that some Jackson roads had potholes within a year of being resurfaced.

How we build for it

MDOT's own answers to Yazoo clay on highways are to undercut and replace problem clay beneath the pavement, treat the subsoil with lime or cement, and limit clay in fill. Driveways and lots follow the same logic at a smaller scale. We proof the subgrade, dig out soft or heaving clay, and build a compacted crushed-stone base thick enough to bridge small movements in the ground. Where the clay is bad over a large area, stabilizing it is an option we price separately so you can compare.

Cost guides describe a typical residential section as 2 to 3 inches of compacted asphalt over 6 to 8 inches of gravel base, and 3 to 4 inches over 8 to 10 inches for heavier vehicles. Your quote says which section we are building and why. Thickness matters: when Robinson Road was repaved, an asphalt industry spokesman noted that the 1.5-inch overlay was thinner than the 2 to 3 inches he would have liked. The same thinking applies to your driveway.

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Water and drainage

Water is what sets Yazoo clay in motion, so keeping it off and away from the pavement is half the job. We set cross slope so rain sheets off the surface, keep the low end from dumping water against a garage slab, support and backfill edges so runoff cannot get under them, and point out where a swale or a driveway pipe would help. Large lots get grades checked against their drains, since undersized or clogged inlets are a common cause of standing water and early failure around Jackson.

Weather and timing

Jackson's winters are short and mild. The January average low is about 37 degrees and snow averages well under an inch a year, so the paving season is long. Hot mix still has to be compacted before it cools, so larger jobs wait for warm, dry days. Summer brings its own issue: the record high here is 107 degrees, and fresh asphalt stays soft in July heat, so we tell you how long to keep cars, trailers and jack stands off it.

City streets, county roads and state highways

Where your driveway meets the road decides whose rules apply. Driveways connected to a state highway, such as US 49, US 51, US 80 or a state route, need an MDOT permit on its Form MND-001 before construction, and pipe culverts there must meet MDOT's design criteria. Inside Jackson, permits go through the city's online permit portal. Ridgeland, Madison, Flowood, Brandon and the other towns have their own processes, and county roads go through the county. We sort out which applies at the estimate. Before any machine digs or grades, we request utility locates through MS811, which Mississippi law requires at least two working days ahead.

What a new driveway job includes

• Measuring, checking slope and drainage, and noting the road connection
• Removing old asphalt, concrete or worn-out gravel
• Undercutting soft or heaving clay and replacing it with compacted stone
• Grading and compacting the stone base to the depth in your quote
• Placing and rolling hot-mix asphalt to the stated compacted thickness
• Tapering edges and transitions at the garage, walks and road apron
• Care instructions for the first summer and a sealcoat timeline

We are based in Jackson and work across the three counties of the metro. North of the city in Madison County, Ridgeland, Madison and Canton run from newer subdivisions and office parks to older town centers. East across the Pearl River in Rankin County, Flowood, Brandon, Pearl and Richland have grown fast, and many of their driveways and lots are now due for a first repair or sealcoat. West and south in Hinds County, Clinton, Byram and Terry mix established neighborhoods with long rural drives. The Yazoo clay problem shows up across the area, but drainage, lot size and the road you connect to change from town to town. Each town page below covers what is particular to that community.