Gravel, Sand and Stone Delivery in Manchester, NH

Loose sand under a built-up center

The USDA soil survey labels the center point of ZIP 03101 as Urban land. Buildings and pavement cover 90 percent of that map unit. The named natural soil, Windsor, makes up 4 percent of it, so most of what lies under any one lot is fill and graded ground from past construction.^[1]

Windsor itself is an extreme case of good drainage. The survey rates it excessively drained, puts it in hydrologic group A, where water soaks in fast and runoff stays low, and gives its top mineral layer a texture of loamy sand. Shrink-swell in the top 100 cm is low, at 1.5 percent, so the soil barely moves with the seasons.^[1]

That combination helps a builder in one way and hinders in another. Sand that drains this freely rarely holds water long enough to freeze into heaving lenses. On the other hand, loose sand has almost no cohesion, so it shifts under load and spills from the sides of any trench or pad unless it is compacted and confined.^[1]

Deeper down, the USGS state geologic map shows the Massabesic Gneiss Complex at the center point, a Neoproterozoic unit of gneiss, biotite schist, granofels, calc silicate rock, granite and migmatite. Hard crystalline rock of that kind can turn up as ledge or boulders during digging. The ground at the center point lies 200 feet above sea level.^[2],[3]

Snowbanks and a long freezing stretch

The nearest NOAA normals station is Massabesic Lake, NH, about 4 miles away. Its yearly averages are 42.5 inches of precipitation and 52.8 inches of snow. On 161 days in an average year, the low there falls to 32 F or colder.^[4]

At Massabesic Lake the median last spring freeze is April 30 and the median first fall freeze is October 11. Outdoor planting and seeding fit between those dates, and stone work goes best once the ground has thawed and dried in late spring.^[4]

Snow management shapes every surface here. Plows and snowblowers chew loose stone, so parking areas and drives do best with a bound surface over a compacted base. Plan where plowed snow will pile, and keep that spot away from beds and walks that would be buried or soaked in the spring melt.^[4]

On icy steps and walks, a bucket of Concrete Sand gives grip without the salt damage that eats into pavers and plants. Sweep it into a planting bed or a joint once spring arrives.^[4]

Building a pad on fast-draining sand

Sand moves when it is not held in place, so a parking pad starts with confinement. Dig out the loose surface, compact the floor until it no longer gives underfoot, and set a firm edge of timber, steel or block around the area before the stone arrives.^[1]

Build the base from Road Base or Crushed Concrete in thin lifts, wetting and compacting each one. Their fines bind the angular stone into a solid layer, which loose sand cannot do on its own. On sandy native ground, fabric under the base is not always needed, but it helps where fill and old debris mix with the sand.^[1]

For the surface, Asphalt Millings pack into a dense, dark top that stands up to plowing and absorbs winter sun. Driveway Gravel or 3/4" Crushed Stone gives a lighter finish and drains instantly. Avoid Pea Gravel on any area you plow, because the round stones roll away under a blade.^[4]

Ledge or a boulder found while digging can stay where it is if it sits below the base. Pack Road Base tightly around it so the surface does not crack or settle unevenly over the hard spot.^[2]

Rear lots that take delivery trucks or dumpsters need a thicker base than a driveway for one car. Add an extra lift of Road Base or Crushed Concrete where heavy wheels turn and stop.^[1]

Courtyards, alleys and small lots

On a lot covered mostly by buildings, stone projects tend to be narrow: a strip between buildings, a courtyard, a rear lot for a few cars. #57 Crushed Stone over fabric keeps a shaded strip clean and dry, and it does not freeze into a slick crust the way packed dirt can.^[1],[4]

For walks, Stone Dust Screenings compact into a smooth, firm path that a snow shovel can clear. Pavers set on a thin bed of Concrete Sand over compacted Road Base give a cleaner look for an entry. Fill the joints with Mason Sand or more screenings.^[4]

Planters and raised beds bring green into a built-up courtyard. Fill them with Garden Soil rather than native sand, which dries out fast and holds few nutrients. Mix in Compost each spring after the April 30 median last freeze.^[1],[4]

Water that soaks straight in

Where native Windsor sand lies at the surface, water disappears into it quickly, and a dry well works well. Dig a pit away from the foundation, line it with fabric, and fill it with #4 Crushed Stone or Drain Rock so roof water collects and soaks away. On hydrologic group A soil, the pit empties fast between storms.^[1]

Paved ground behaves differently. With 42.5 inches of yearly precipitation at Massabesic Lake, rain and melt running off roofs and lots needs a path. A gravel strip of #67 Stone along the low edge of a parking area slows that runoff and lets some of it soak in where the sand below allows.^[1],[4]

In a garden, fast drainage has a downside. Loamy sand lets roots breathe but dries out within days of a rain. Shredded mulch holds moisture in, and Brown Shredded Mulch, Black Shredded Mulch or Red Mulch spread a few inches deep keeps planters and beds from drying out in July. Add a fresh layer before the October 11 median first freeze to shield roots.^[1],[4]

Basement window wells on sandy ground drain well when the bottom holds a few inches of clean stone such as #67 Stone. Keep the wells covered so snow does not pack in and melt against the glass.^[1],[4]

Housing in ZIP 03101

The Census counts 2,041 housing units in ZIP 03101. Detached single-family houses make up 7 percent of them, and owners live in 9 percent of the occupied homes. The median home in the ZIP was built in 1972.^[5]

For Manchester as a whole, the Census reports 52,108 housing units. Detached houses account for 36 percent citywide, and the city's median year built is 1966.^[5]

With apartments and rentals making up most of the ZIP, many buyers are building owners and managers. Typical orders are Road Base and Asphalt Millings for a rear lot, mulch for street-side beds, and Garden Soil for courtyard planters.^[5]