Filling a large sinkhole.. ?
The biblical rains in New England a week ago left a surprise sinkhole in my yard, about 4' across, and 5-6' deep. The soil under the grass/loam, is very sandy. I can see timbers well exposed at the bottom of the hole.
While I know trees and stumps were probably buried when my house was built in '97, I know that that is not long ago enough for waste wood underground to rot away and cause the grade to drop. This hole is a cylinder shape, some water flow clearly removed a large mass of sandy soil. The area was "low" prior and water would pool there and weep down into the earth.
Anyway, what is the best way to fill such a hole? I am inclined to get 3-5 yds of fill and just have it dumped on the hole, and give it the winter to settle in. But I vaguely remember reading somewhere that you should fill a hole with gravel up to about 6" then top soil. This would give the water some way to drain through, and not take the fine, sandy soil with it. I do have access to a lot of 3/4" crusher run gravel.
Ideas? Comments, experiences?