This shoaling is in a section known as Hell Gate just west of Sewall Point at the mouth of the St. Lucie River and near the easternmost section of the Okeechobee Waterway. The coordinates given in the Notice put the temporary buoy 17A in the middle of Sewall Point, but we have to assume it is near the charted green marker #17. Since the shoaling (charted) is encroaching from the west, favoring the green side of the channel is your best bet.
FLORIDA-INTRACOASTAL WATERWAY-ST. LUCIE INLET TO FT. MYERS AND LAKE OKEECHOBEE: Shoaling.
The Coast Guard has established St Lucie River Temp Buoy 17A in position 27-11-02.516N/080-11 49.228W. The Buoy marks a shoal that is encroaching the St Lucie River from the west. Mariners are urged to use caution while transiting the area.
That shoal has been encroaching VERY slowly for many years. It is high time NOAA revised the double dashed channel line; they should have ten years ago!
W.E. “Ted” Guy, Jr.