Gravel Delivery in Connecticut

Two kinds of bedrock split our Connecticut cities. Along the coast west of New Haven and up into the hills, the state geologic map shows old metamorphic rock. Bridgeport's center point carries gneiss and mica schist, and the center points of Stamford and Waterbury carry gneiss and schist. Gneiss is a hard, banded rock that crushes into tough, angular stone. Schist splits along shiny layers of mica and breaks down faster, so it is less often used where stone has to carry weight.^[1]

New Haven and Hartford sit on younger rock laid down in a long valley. New Haven's center point shows arkose, conglomerate, siltstone and sandstone. Hartford's center point shows arkose, siltstone, shale and conglomerate. Arkose is a sandstone rich in feldspar, often reddish brown. Conglomerate is a rock of rounded pebbles cemented together. These sedimentary rocks are softer than gneiss, and fragments of them in a yard can crumble when they stay wet through a winter.^[1]

The USDA survey maps silt loam at Hartford's center point and classes it well drained. Silt loam is smooth and easy to dig, and it holds water well for plants. Silt loses strength when soaked and lifts when wet silt freezes, so a drive over it needs clean stone at the bottom and good drainage on the sides.^[2]

The coastal cities sit low. The ground at Stamford's center point stands 20 feet above sea level, and New Haven's and Bridgeport's center points each stand at 30 feet. Hartford's center point is at 110 feet and Waterbury's at 300 feet. Across all five, glaciers left a jumble of boulders, sand and gravel over the bedrock, which is why so many Connecticut yards turn up rocks with every shovelful.^[3]

Rain falls through the whole year. The weather station used for Stamford averages 51.6 inches of precipitation a year. Waterbury's station averages 44.9 inches and Bridgeport's 44.1 inches. Hartford's averages 42.8 inches and New Haven's 41.8 inches. A lawn can stay soft for a day or more after a soaking rain, and a loaded truck on wet turf leaves ruts that take a season to fix.^[4]

Winter is long enough to shape the plan. The Waterbury station logs 129 days a year at 32 F or colder. Hartford's logs 121 days, Stamford's 119 days, New Haven's 102 days and Bridgeport's 92 days. Stamford's station averages 34.0 inches of snow and Bridgeport's 33.6 inches. Frozen ground can carry a truck in the morning and soften as it thaws in the afternoon. Late winter thaws are the hardest time for a drop on grass.^[4]

Many lots in these cities are small, with tight driveways, stone walls and old trees. A dump truck needs room to back in and clear height above the bed when it rises. Check for low limbs and wires over the drive. On a narrow city street, the load may need to go at the curb where that is allowed, on a tarp, with help on hand to move it. In hill towns around Waterbury, choose a spot that is level side to side.^[3]

Plan around snow banks in winter. Plowed snow narrows a driveway and hides its edges, so clear a wide lane and mark the edges if a load comes in the cold months. Stone and sand can sit in the cold with no trouble. Topsoil, Compost and mulch left uncovered can freeze into a hard pile, so cover them or spread them soon after they land.^[4]

Older homes bring their own limits. Driveways along stone walls are often narrow, and a truck can only back so far before the wall or a tree gets in the way. Measure the narrowest point of the drive and the height of the lowest limb before choosing a drop spot. On the well drained silt loam mapped at Hartford's center point, a dry lawn may carry the truck, but a wet one will rut.^[2]

Driveway repair and rebuilding come up more than any other job. Older gravel drives often have potholes and soft spots where water sits through the winter. Dig out the soft areas and lay fabric on silty ground like the survey shows at Hartford's center point. Add Road Base or Crushed Concrete in packed lifts, then top with 3/4" Crushed Stone or Driveway Gravel. Crown the surface so rain and melt run off to the sides.^[2]

Drainage is a constant job. With 51.6 inches of yearly precipitation at Stamford's station, wet basements and soggy yards are common complaints. A French drain lined with fabric and filled with Drain Rock or #57 Crushed Stone carries water away from a foundation. A dry well filled with the same stone takes a downspout. Riprap protects a slope where a pipe or swale lets water out toward a stream bank.^[4]

Walkways and patios suit the smaller lots. A paver or bluestone patio needs a packed bed of Road Base and a thin, level layer of Concrete Sand or Stone Dust Screenings. Pea Gravel makes a quiet, simple path between beds, and #89 Crushed Stone packs firmer for a path that sees a wheelbarrow. Hold either one in with steel edging so it does not spread into the lawn.^[1]

Garden beds benefit from new soil. Glacial ground can be stony and thin, so many owners build raised beds of Garden Soil or a blend of Topsoil and Compost. Brown Shredded Mulch and Black Shredded Mulch hold moisture in summer and insulate roots through freezing nights. River Rock works in drip lines under roof edges and in rain gardens, where it slows water without washing away.^[1]

Smaller jobs use the plain materials. Fill Sand backfills trenches and pipes. Fill Dirt raises a low corner, and Topsoil finishes it for seed. Playground Sand fills a sandbox, and Wood Chips suit play areas and woodland paths. Asphalt Millings give a firm, dark surface for a long shared drive or a parking area.^[1]

Rain gardens and swales are a growing share of the work. A shallow basin lined with River Rock at the inlet and planted with water loving plants catches roof runoff and lets it soak in slowly. A grass swale with a stone center line of Drain Rock moves water across a yard without cutting a ditch. With 44.9 inches of yearly precipitation at Waterbury's station, these features fill often and get plenty of use.^[4]