1 / 12

Coastal & Port Engineering Considerations: Jacksonville Harbor Study

Explore the physical impacts of river hydraulics, storm water levels, and ship wake on the Jacksonville Harbor deepening project. Understand the challenges and implications for coastal and port engineering.

yoland
Download Presentation

Coastal & Port Engineering Considerations: Jacksonville Harbor Study

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Coastal & Port Engineering Considerations of the Jacksonville Harbor Deepening Study Kevin Bodge, Ph.D., P.E. Port & Coastal Engineer Senior Vice President -- Olsen Associates, Inc.

  2. Coastal & Port Engineering Considerations of the Jacksonville Harbor Deepening Study • Physical Impacts • River hydraulics (flow, levels & sedimentation) • Deeper, hydraulically-efficient artificial channel • -- increases upstream salinity • -- increases water levels • -- changes flow patterns

  3. Coastal & Port Engineering Considerations of the Jacksonville Harbor Deepening Study • Physical Impacts • River hydraulics (flow, levels & sedimentation) • Deeper, hydraulically-efficient artificial channel • -- increases upstream salinity • -- increases water levels • -- changes flow patterns • Storm water levels • -- Tide ranges increase up to 0.4 feet • -- Storm tides not described

  4. Coastal & Port Engineering Considerations of the Jacksonville Harbor Deepening Study • Physical Impacts • River hydraulics (flow, levels & sedimentation) • Deeper, hydraulically-efficient artificial channel • -- increases upstream salinity • -- increases water levels • -- changes flow patterns • Storm water levels • -- Tide ranges increase up to 0.4 feet • -- Storm tides not described • Salt water intrusion • -- impacts to aquifer . . . not included

  5. Coastal & Port Engineering Considerations of the Jacksonville Harbor Deepening Study SOME OF THE STUDIES NOT IN THE DRAFT REPORT FOR PUBLIC REVIEW & COMMENTS

  6. Coastal & Port Engineering Considerations of the Jacksonville Harbor Deepening Study • Physical Impacts, Cont’d • 4. Salinity • -- The Corps claims that natural changes in salinity cause more stress than the project’s changes. • -- The impacts are real, but not clearly presented • -- Fish & shrimp studies etc. are still ongoing

  7. NO ACTION (No Project) 50-Ft PROJECT

  8. Coastal & Port Engineering Considerations of the Jacksonville Harbor Deepening Study Physical Impacts, Cont’d Ship Wake and Bank Erosion -- Corps study claims no increase in ship wake, but that is based upon the current design vessel. -- Deeper channel  Bigger Ships  Greater Ship Waves 970’ ship length at 15 knots: wake = 3.7’ 1260’ ship length at 15 knots: wake = 6.8’ (84% increase) 970’ ship length at 10 knots: wake = 0.4’ 1260’ ship length at 10 knots: wake = 1.0’ (150% increase)

  9. Coastal & Port Engineering Considerations of the Jacksonville Harbor Deepening Study Physical Impacts, Cont’d 6. Offshore Disposal Area -- Construction requires disposal of 18 million cubic yards (mcy) -- Existing offshore disposal area capacity = 3.3 mcy -- Expanded offshore disposal area close to sand borrow areas.

  10. Coastal & Port Engineering Considerations of the Jacksonville Harbor Deepening Study • Fiscal Impacts • Initial Construction Cost • Fed: $350M (48%) Local: $384M (52%) • Maintenance Dredging Costs • -- Fiscal projections are not included in report • -- Local cost-share increases from 0% to 50% ! • Dredging requirements will increase by 130,000+ cy/yr • or, about $1.2M per year. • Probable annual dredging req’t = 1,540,000 cy/yr • Probable equivalent total cost = $14 million / year • Probable NON-FEDERAL cost = $7 million/year. My estimates, not in report

More Related