Elbert,

From what I could see there is one main bridge w/ SIGNIFICANT culverts in place... culverts you could take a small boat through... The bridge is over what is rather the "main" part of the lagoon, on the far eastern side of the road... The rest of the road on the eastern side is more of a built up dam, no culverts from what I saw... Once you get about 1/2 way across, the road is much more on solid land and there are drainage channels on either side of the road. The last stretch of road heading west, as you approach the west side/bay is on high/solid land.