A Richmond man was driving a tanker loaded with 5,473 gallons of tar through Nelson yesterday when the truck overturned. Nearly all of the tar spilled out, pouring into a house’s front yard and covering a two-year-old dog with the hot, sticky substance. The animal was put to sleep at a nearby animal hospital a short time later. State police closed the road, and will not be able to remove the tar until it dries. They have accused the driver of speeding, but charges have not yet been filed. The house’s property damage is estimated at $15,000.