1. Dredged Material Beneficial Uses/Alafia Banks, Whiskey Stump Key and McKay Bay Dredge Holes August 12, 2004 Presentation to ABM

2. Tampa Bay Dredge Hole Assessment Project

4. “WORST” DREDGE HOLE McKAY BAY (hypoxia, sediment contaminants, degraded benthos, degraded fish community) Conclusions:

5. Dredge holeFisheriesBenthos McKay Bay11 St. Pete Air26 Northshore33 Whiskey Stump144 Whiskey Stump255 MacDill Runway68 Cypress Point72 Gandy N.89 Shore Acres97 Spearman Rank Corr. = 0.583, P = 0.0992 [Based on FIM Index 1 (minus seine data) and approx. mean TBBI from spring and fall] Source: FWC FWRI Fisheries Independent Monitoring Program

6. Alafia Banks enhancement: beneficial use project to stabilize erosion and enlarge intertidal habitat US Army Corps of Engineers Alafia River Turning Basin dredging area

7. Alafia Banks: one of the most important and diverse wading bird rookery in the Southeastern US

8. ACOE and FDEP Requirements ACOE: For economic viability, place at least 700,000 cubic yards of material - Alafia Banks can take 450,000 cy FDEP: For permitting the Alafia Banks project, shallow-up 20 acres of bay bottom by filling artificial hole

9. ACOE project: Fill one or both Whiskey Stump Key holes Recommend- ations from July 8, 2004 Dredge Hole Assessment Advisory Group meeting: Do not fill Whiskey Stump Key holes, due to existing habitat value Whiskey Stump Key holes: West and East

10. Dredge Hole Assessment Advisory Group Recommendations: July 8, 2004 Recommend that the US ACOE strongly consider the feasibility of using the McKay Bay Dredge hole for placement of beneficial use material from the Alafia River project.

11. Dredge Hole Assessment Advisory Group Recommendations: July 8, 2004 Recommend that beneficial uses of material from the Alafia River project be prioritized as follows: 1. Alafia Banks enhancement 2. McKay Bay Dredge Hole

12. McKay Bay dredge hole

13. Sediment Contamination Action Plan Sites 1.Palm River/McKay Bay 2.Ybor Channel 3.West Davis Island 4.East Bay As recommended by TBEP Sediment Quality Assessment Group: July 2004 Site 1 Site 2 Site 3 Site 4

14. US ACOE obstacles for use of the McKay Bay hole for Alafia River Project material Very fast time table Permitting (FDEP and NEPA) Funds to make up the difference in transporting material to McKay Bay vs. Whiskey Stump Keys

15. Hillsborough County PRF: $75,000 TBEP: $25,000 (staff request) PROJECT OBJECTIVE: –Restore McKay Bay dredge hole by capping with cleaner dredged material from the Alafia River ACOE project, by supporting the transport of clean dredged material to McKay Bay BENEFITS: –Restoration of polluted area (PRF priority) –Cost-effective method (ACOE is primary funder) –Supports Tampa Bay sediment quality goals –Supports approved Dredged Material Management Plan –Supports enhancement of bird rookery at Alafia Banks