Sanibel Summary & Conclusions

• The beaches of northern Sanibel Island retreated an average of -15.9 feet per year in the 82 months following the 1989 Captiva fill project.  Most of the recent shoreline losses occurred between locations 112.5 and R114.
• In response to ongoing erosion in northern Sanibel Island the area received 237,100 cubic yards of beach fill along 3,700 feet of shoreline (110.5 to R114) in April 1996.

• The shorelines in the northern Sanibel Island project area receded an average of 18 feet in the project area in the 54 months following the 1996 nourishment.  In the same period the area's beaches lost 75,000 cubic yards of sand.  Approximately 69 percent of the fill volume remains.

• The Northern Sanibel project area has receded an average of 24 feet since May 1996 and 5 feet from 2000 to 2002.
• Within the project area on Sanibel, the average beach width remaining in August 2002 is 121 feet.
• The next renourishment project will place fill along the entire shoreline between R-110 to R-116, except for a gap at Clam Bayou.

• On Sanibel Island the design is based on an interlocal agreement which states that 25,000 cubic yards per year should be placed between R110 and R116N.  Both the As-Built and pay volumes exceed the amount in the agreement.  The Corps of Engineers placed 244,000 cubic yards of sand between R110 and R116N, over a nine year supply by the interlocal agreement.