Dredged Material Beneficial Uses/Alafia Banks, Whiskey Stump Key and McKay Bay Dredge Holes August...
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Transcript of Dredged Material Beneficial Uses/Alafia Banks, Whiskey Stump Key and McKay Bay Dredge Holes August...
![Page 1: Dredged Material Beneficial Uses/Alafia Banks, Whiskey Stump Key and McKay Bay Dredge Holes August 12, 2004 Presentation to ABM.](https://reader038.fdocuments.in/reader038/viewer/2022110213/5697c0231a28abf838cd3e4d/html5/thumbnails/1.jpg)
Dredged Material Beneficial Uses/Alafia
Banks, Whiskey Stump Key and McKay Bay
Dredge HolesAugust 12, 2004
Presentation to ABM
![Page 2: Dredged Material Beneficial Uses/Alafia Banks, Whiskey Stump Key and McKay Bay Dredge Holes August 12, 2004 Presentation to ABM.](https://reader038.fdocuments.in/reader038/viewer/2022110213/5697c0231a28abf838cd3e4d/html5/thumbnails/2.jpg)
Tampa Bay Dredge Hole Assessment Project
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“WORST” DREDGE HOLE
McKAY BAY (hypoxia, sediment contaminants, degraded benthos, degraded fish community)
Conclusions:
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Dredge hole Fisheries Benthos
McKay Bay 1 1
St. Pete Air 2 6
Northshore 3 3
Whiskey Stump1 4 4
Whiskey Stump2 5 5
MacDill Runway 6 8
Cypress Point 7 2
Gandy N. 8 9
Shore Acres 9 7
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
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Alafia Banks enhancement: beneficial use project to stabilize erosion and enlarge intertidal habitat
US Army Corps of Engineers Alafia River Turning Basin dredging area
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Alafia Banks: one of the most important and diverse wading bird rookery in the Southeastern US
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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
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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
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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.
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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
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McKay Bay dredge hole
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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
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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
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Hillsborough County PRF: $75,000TBEP: $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