JACKSONVILLE, Florida, Dec. 13 -- The U.S. Army Corps of Engineers-Jacksonville District issued the following news release: The U.S. Army Corps of Engineers (USACE) Jacksonville District plans to execute a two-day deviation Dec. 14-15 that will release water from the lake as part of an ongoing sediment study by the South Florida Water Management District (SFWMD) and the U.S. Geological Survey (USGS). The releases will affect both the Julian Keen Lock and Dam (S-77) and the Port Mayaca Lock and  more