In Tamworth the driveway question starts at the road, not the house. Frontage on Route 16, 25, 41, 113 or 113A means an NHDOT permit. Frontage on a town road means the town. Frontage on a private or Class VI road means the selectmen have to grant a waiver before anything gets built at all. Find out which one you’re on before you buy a yard of gravel.
State law, RSA 674:41, ties building permits to frontage on a maintained road, and Tamworth holds the line on it: no building on land reached by a private or Class VI right-of-way unless the Board of Selectmen grants a waiver. Class VI roads are the old ones the town stopped keeping up. On the tax map they look like roads. On the ground, some of them are a stone wall and a pair of ruts. A waiver normally comes with a recorded notice that the town isn’t maintaining the road or liable for what happens on it — so the plowing is yours, and so is the next washout.
The state side is its own process. Route 113A, the Chinook Trail, loops through the thin northwest corner past Wonalancet, and lots up there tend to sit well back from the pavement. Route 16 carries the summer traffic up the east side past White Lake and Chocorua. A new entrance on any of the five state routes goes through NHDOT, sight distance and all, and the state doesn’t hurry.
The town roads in between are pavement and dirt both, and plenty of driveways come off a gravel road crowned for a grader with a ditch on each side. That ditch is where your culvert goes. Get it wrong and the road’s spring runoff comes down your driveway instead of under it.
Buying land on a back road in Tamworth? Ask the town office what class the road is. If it’s Class VI, the waiver comes first and the driveway second.
Strip the topsoil and organics. All of them. On the valley sand you can often build almost directly on subgrade with a lift of crushed gravel and a good crown. On the till and silt up the slopes we lay fabric first and put a thicker base over it, because that soil goes to pudding in mud season and pumps up into the gravel if nothing separates them.
Long hill drives need water taken off them at intervals. Broad dips or cross culverts on the steep pitches; ditches lined with stone where the grade is enough to cut. A drive that sheds water every hundred feet or so stays put. One that carries it all the way to the bottom is a gully by the second April.
And frost. Four-plus feet of it will lift a culvert sitting in the wrong material, so pipes get bedded and covered in gravel, not native fill, with enough cover that the plow blade never finds them.
New gravel driveways in Tamworth run $15–$30 per linear foot for a twelve-foot travel way with base, surface and crown. Flat runs on the valley sand sit near the bottom; long hillside drives needing fabric, ditching and cross culverts sit near the top. Culverts typically run $800 to $1,500 installed, and state-highway entrances are quoted per site.
Only with a waiver from the Board of Selectmen. Tamworth doesn’t allow building on land accessed by a private or Class VI right-of-way without one, under RSA 674:41. Expect a recorded notice that the town won’t maintain the road or be liable for it. Sort this out before you buy.
It depends on the road. Frontage on Routes 16, 25, 41, 113 or 113A means NHDOT; a town road means the town. Get the permit before any work. It fixes the location, the sight distance and often the culvert, and all three are expensive to change once gravel is down.
If the road has a ditch, almost certainly, and the permit will usually say so. The pipe has to carry spring melt, not just August flow, and it has to be bedded and covered so frost and the plow leave it alone. Undersized culverts are the failure we see most.
Take the water off before it gathers. Crown the surface, cut broad dips or set cross culverts on the steep pitches, and line ditches with stone where the grade will cut. On Tamworth’s till slopes, fabric under the base keeps mud season from pumping gravel into the subgrade.
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