Alton’s DPW hands out a one-page driveway spec with the permit, and most of the washed-out driveways we get called to fix were built by somebody who never read it. Sixteen feet wide, tops. A 15-inch culvert if you’re crossing the ditch. Two percent of fall away from the road. We build to that sheet, then build the rest of the driveway to outlast the truck that delivered the gravel.
Start at the road. Any new driveway onto one of Alton’s 87-odd miles of town road needs a Driveway Construction Permit from Public Works at 80 Letter S Road. Ten dollars, and it comes with a specification sheet worth more than that: one entrance per lot, no wider than sixteen feet, flared at the pavement; the first ten feet graded to drop six inches below the road edge so it doubles as a gutter; the whole apron pitched two percent away from the traveled way; ten feet off the property line; and 250 feet of all-season sight distance each way, measured at a driver’s eye height of three foot nine. Can’t get the sight distance? There’s a waiver, and it puts the brush-cutting on you forever.
The culvert is the part people argue about. If your driveway blocks the flow in the roadside ditch, the town requires a 15-inch HDPE pipe, twenty feet minimum, set where the foreman stakes it during the on-site review. You buy it, you install it, and you replace it — the town only maintains the ditch. We stake the location, meet the DPW, and set the pipe with proper bedding and cover so it doesn’t crush the first time the oil truck backs in.
Then the driveway itself, which the permit doesn’t care about and you should. Alton’s Rural zone means 200 feet of frontage and two-acre lots, so driveways out toward Stockbridge Corner and the Gilmanton line run long — three, four hundred feet through pine on till, sometimes across a low spot that’s dry in August and a brook in April. Up off Route 11 and 28A it’s the opposite problem: short and steep, camp roads under Mount Major that were graded for a Ford in July and now get a plow truck every storm. Different driveways. Same physics. Water has to come off the surface, not down it.
Stake your driveway before you call the town for the on-site review, and stake it where the sight distance is best, not where the walk to the door is shortest. Moving a stake is free. Moving a culvert isn’t.
We strip the organics — all of them, not the top inch — because a driveway built on duff turns into a trench. Where the subgrade is soft till or that spring-wet crossing, geotextile goes down first. Then bank-run gravel, a foot or better, placed in lifts and compacted, not dumped and driven on. Surface is three to four inches of crushed gravel, crowned so the middle rides higher than the edges. On the steep camp-road driveways we cut a shallow diagonal water bar or two so the flow leaves before it builds up speed.
Ditches on the uphill side wherever there’s an uphill. Culverts where a ditch has to cross — and on the long Rural-zone runs that means a second and third pipe out along the driveway, not just the one at the road. Every culvert gets a stone headwall or a splash pad at the outlet so the discharge doesn’t dig its own gully toward the marsh.
Regrades are the same job in a smaller box. We pull the gravel that migrated to the edges back to the center, re-crown, open the ditch, clear the culvert, compact. Once a year on a camp road; once every few years on a home driveway with a real base under it. If the base is gone we’ll say so and price only the section that failed.
New gravel driveways in Alton run about $15–$30 per linear foot for a 12-foot travel way with base, surface, and crown; long Rural-zone runs sit toward the low end per foot and steep camp-road rebuilds toward the high end. Culverts, headwalls, and the town permit meeting are quoted per site. Regrades are a fraction of new construction.
For a new entrance onto a town road, or to widen or change the use of an existing one, yes — a Driveway Construction Permit from Public Works, ten dollars, with an on-site review where the foreman stakes the culvert location. Driveways onto state routes 11, 28, and 140 go through NHDOT instead, and private camp roads follow whatever the road association says.
You do. Alton’s highway access ordinance is explicit: the property owner purchases and installs the culvert, the town maintains the ditch, and the owner repairs and replaces the pipe. Minimum is 15-inch diameter, 20 feet long, HDPE. We handle the purchase and the install as part of the driveway.
Anything past about 10 percent is going to fight you every spring in gravel; the camp-road driveways off Route 11 under Mount Major often run steeper because the lot leaves no choice. We manage it with water bars, a heavier crown, coarser surface stone, and sometimes by paving just the steepest pitch and leaving the rest gravel.
Drainage. The spec drops the driveway six inches over the first ten feet so road runoff turns and follows the ditch instead of running down your driveway, and so your driveway runoff can’t reach the traveled way. It’s a gutter you drive over. Build it flat and you get a river.
Yes. The private roads around Halfmoon, Sunset Lake, and the Bay are most of our regrade work — pull the gravel back to center, re-crown, open the ditches, replace crushed culverts. Road associations usually split the cost, and a spring and fall visit keeps it drivable year-round.
Free site walks, test pits before quotes, flat pricing, and a crew that knows Lakes Region ground.
Tell us where the property is and what you’re trying to do. We’ll walk the site, talk it through, and give you a straight, flat quote.
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