Frequently Asked Questions
What would happen if dredging is conducted in the spring and summer months? The simple answer is, we expect adult loggerhead sea turtles to die. Historically, loggerheads have been the most significantly impacted by hopper dredges in Georgia. The summer months are when adult, reproductively-active females congregate in local waters—putting them directly in harm’s way. 214 loggerheads could legally be killed over a 3-year period before the Corps would have to stop the project or request a higher take limit.
So, are you against all dredging? No. We recognize that annual removal of sediment is necessary in order to maintain safe shipping channels. We also know that some incidental take is expected with normal dredging activities. However, this “operations and management” dredging has been conducted during winter months, when adult nesting loggerheads are far less abundant, for more than three decades. From a conservation perspective, the loss of an adult turtle is much more damaging than that of a juvenile and must be avoided at all costs. To ensure the continued survival of the species, the December 15-March 31 annual maintenance dredging windows must remain in place.
What is a ‘take’ of an endangered species? To conduct dredging in waters where sea turtles or other protected species occur, the U.S. Fish & Wildlife Service and the NMFS must authorize incidental “takes” in accordance with the federal Endangered Species Act. This means that some animals will die or be maimed by an activity authorized by the federal government. A “take” is a kinder, gentler way of saying kill—in this case, essentially grinding up live turtles in the blades of a hopper dredge. Photographs like the ones on this page show just how gruesome an end a sea turtle suffers when falling victim to dredging.
What is the SARBO? SARBO stands for South Atlantic Regional Biological Opinion. NMFS issues Biological Opinions to document their opinions on how federal agencies’ actions affect Endangered Species Act (ESA)-listed species and critical habitat in the southeast. These opinions provide an exemption for the take of federally listed species and specify the extent of take allowed and the conditions with which the agencies must comply. The most recent SARBO is a 653-page document released in July 2020. It contains analyses conducted within the framework of recent ESA rollbacks and new standards that afford endangered species far less protection. The 2020 SARBO eliminated the use of dredging windows to reduce sea turtle mortality. As a consequence, the USACE has informed Georgia DNR that they intend to dredge the Brunswick and Savannah channels during the spring and summer of 2021.
Aren’t loggerhead sea turtles recovered already? No. But if you’ve been following sea turtle conservation for the past few years, you’ve probably heard a lot of celebration. The excitement is understandable—record-setting nesting years like those in 2019, 2016, and 2015 represent decades of hard work on behalf of many dedicated volunteers and staff. But while annual nesting is slowly increasing, models show that the Northern Recovery Unit population (loggerheads born on nesting beaches from the Florida/Georgia border through southern Virginia) is only a third to half of its size from the 1960s. And despite the recent highs, it wasn’t long ago when we experienced record low nesting seasons—setting up a period of plateau or decline until 2040. If dredging windows or other protections are lifted, there could be even more precipitous declines.
What about right whales? One Hundred Miles is passionate about protecting the North Atlantic right whale. But winter dredging has safely coincided with the right whales’ annual calving season in Georgia for more than 30 years. In all that time, there have been no documented interactions between maintenance dredges and right whales. It is extremely rare for right whales to venture into the channels where dredging operations take place, and even if they did, maintaining slow ship speeds would mitigate any risk. GADNR, whose biologists devote significant resources to protecting North Atlantic right whales and assume great personal risk in monitoring and responding to entanglements, opposes the change in dredging windows.
Further, while the Corps claims that their actions are due to concerns over right whale safety, they inexplicably claim that their survey vessels must travel at high speeds to complete surveys and to reach offshore disposal sites. This is not the case. If the Corps is truly concerned about protecting right whales, why aren’t they willing to comply with recommended ship speed regulations of ten knots or less?
What other protected species could be affected?
Atlantic sturgeon are found in the lower estuaries and shipping channels during the winter and spring (December-May). Some takes are expected during winter dredging. However, based on the relatively large size of the Savannah and Altamaha River populations and the fact that documented mortalities are low (3.4 Atlantic sturgeon annually across 3 channels) and primarily juveniles and subadults, it is unlikely that the current mortality level associated with channel maintenance dredging will have an effect on population recovery. Further, unlike with sea turtles, preventative methods, such as having a trawler sweep ahead of the dredge to clear its path, is effective.
What can I do to help?
Thank you to the more than 1,500 of you who sent a letter to CRD, the US Army Corps of Engineers, and Congressman Buddy Carter and Senators Ossoff and Warnock! While the public comment period to Coastal Resources Division has ended, we still need you to make your voice heard. Use our simple action tool to send a letter to the Corps and our elected officials—tell them Georgians won’t stand for dredging that kills our nesting sea turtles! Please personalize your letter as much as possible.