Maine Rivers Face Unusual Ice Jam Risk Despite Low Flood Potential
Maine’s rivers are presenting a paradoxical situation this spring: even as overall flood risk from snowmelt remains low, the potential for localized flooding due to ice jams is significantly higher than normal. This is due to unusually thick ice formations on rivers like the Kennebec and Androscoggin, a result of multiple cold snaps this winter.
The Role of Thick Ice and Unpredictable Breakup
James Sinko, a senior hydrologist with the National Weather Service Office in Caribou, explained that the substantial ice buildup poses a threat. If warmer weather causes the ice to break up into large chunks, these fragments could jam and block river flow, leading to rapid and damaging flooding above the obstruction. While the probability of widespread flooding reaching actionable levels is currently less than 10%, this projection doesn’t account for the added risk of ice jam flooding, as cautioned by Sarah Jamison, also a senior hydrologist with the weather service.
Coast Guard Preparedness and River Conditions
The U.S. Coast Guard is preparing to intervene, anticipating the necessitate to break up the ice on the Kennebec River, likely in mid- to late March. Lt. Amanda Barnett stated that the Coast Guard’s 65-foot harbor tugs can break ice up to 12 inches thick. Icebreakers were recently deployed on the Penobscot River. However, potential repairs may limit the Coast Guard to only one tug for the Kennebec, though efforts are underway to have a second vessel operational.
Favorable Overall Hydrological Conditions
Despite the ice jam concerns, overall hydrological conditions are relatively favorable. Statewide snowfall this winter was slightly below normal, and river levels are generally low. The Androscoggin River in Auburn, for example, is currently at 32% of its historic average for this time of year, compared to 50% last March. Groundwater levels are also at record lows, requiring substantial rainfall to replenish.
The Role of the Maine River Flow Advisory Commission
The Maine River Flow Advisory Commission, formed after the spring floods of 1983, continues to monitor conditions and provide information to emergency agencies and the public. The commission includes representatives from Maine Emergency Management Agency, the U.S. Geological Survey, and other key organizations.
Frequently Asked Questions
- What is an ice jam? An ice jam occurs when ice chunks accumulate and block a river, causing water to back up and potentially flood surrounding areas.
- Is there a drought in Maine? Yes, Maine is currently experiencing drought conditions, with some groundwater sites at record lows.
- What is the Maine River Flow Advisory Commission? It’s a group formed to monitor river conditions and provide information to emergency agencies and the public.
Stay informed about river conditions and heed any warnings issued by local authorities. Explore additional resources on river safety and flood preparedness on the Maine Emergency Management Agency website.
