Navigation Notice #1 Great Salt Lake Marina Area August 24, 2007 GSL Slip Renters and Marina Users. The mouth of the Great Salt Lake State Marina is now quite shallow. At a lake level of 4197.7 (the level as of this date) the optimum depth is only 5' now. Storm surge can effect this depth. Although some of the mouth is only silted in and can be pushed through with deeper draft boats you will want to consider this carefully. Other parts of the mouth are hard packed sand. There are also some rocks in the west end of the mouth (these are marked with an orange buoy in the center of the mouth. Boats drawing more than 4.5 feet will want to seriously consider whether they should leave the marina. When using the marina mouth please use extra caution. As you approach the mouth you may encounter a boat stuck in the mouth. Consider bail-out options and traffic in the marina. Thank you GSL Harbormaster