It doesn't matter if the gravel road was originally built with a perfect crown; it will eventually need to be resurfaced. Snowplows, heavy rain and high traffic will eventually flatten the road. A flat road will allow water to rest on the surface, and will quickly form potholes. The gravel road should be resurfaced to form a crown once a year to prevent potholes and erosion. In areas with large amounts of snow or rainfall, or with roads that are heavily trafficked, the road should be resurfaced twice a year.Source: https://www.ehow.com
"What happens to a road surface that has a "rounded crown" rather than the recommended "A" shaped crown? In a word, Potholes! Where do they occur? In the middle of the road. Why? Lack of drainage on a very critical area!"Getting Your Crown in Shape
"Crowning is one of the quickest ways to get water off the driveway, preventing significant erosion of the road surface."
Smoothing and Reshaping the Traveled Way
Federal Highway Administration
SANDGATE STORMWATER MASTER PLAN - December, 2017The Bennington County Regional Commission (BCRC) received a grant from the Vermont Agency of Natural Resources (Ecosystem Restoration Program) to develop a Stormwater Master Plan (SWMP) for the Town of Sandgate.
Vermont Municipalities will be required to inventory all of their hydrologically-connected road segments by December 2020 to establish baseline road conditions. The Road Erosion Inventory (REI) results "score" each 100-meter road segment into one of three categories: Fully Meets, Partially Meets, and Does Not Meet MRGP standards. The REI template is based on evaluating whether necessary road BMPs (standards) are in place and assessing erosion levels.Bringing Vermont's Municipal Roads to a Common Standard for Water Quality