Numbers in the middle of the roadways are elevations of the respective sanitary sewer manhole covers above mean low tide.
Along Dune Road, the manhole covers are all between 10 and 11 feet above mean low tide;
between northbound DE 1 and the dune side fence the manhole covers are between 6.5 and 8 feet.
Click on each map for a larger view of each half.
Numbers in the middle of the roadways are elevations of the respective sanitary sewer manhole covers above mean low tide.