A more troubling part of the study's forecast was that Lake Michigan-Huron is expected to decrease to 174.5 by 2030, only eight years away. This would make it 3.5 feet lower than the lows measured between 2000 and 2014. Such a drop may render some coastal ports and marinas inoperable, and it may be possible to walk to numerous islands on Lake Huron's Georgian Bay and North Channel.