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Report of the District Engineer-Continued
Economic Considerations-Continued

Overview......

Assumptions

Planning Setting.

Without Project Conditions

Savannah Vessel Fleet.

Harbor Improvements...

Alternative Future Conditions.

Vessel Technology:

Commodity Projections and Major Markets ..

40-Foot Channel Depth

Container Fleet........

Bulk Fleet.

42-Foot Channel Depth

Container Fleet..

Bulk Fleet....

44-Foot Channel Depth

Container Fleet..

Bulk Fleet.

Port Facilities.......

Container and General Cargo Facilities.

Oil Handling and Bunkering Facilities

Dry Bulk Handling Facilities ....

Liquid Bulk Handling Facilities

Port Expansion Plans .

Historical Operating Practices.

Underkeel Clearance..

Light Loading

Need for Project Modification.

FORMULATION AND EVALUATION OF ALTERNATIVES

Development and Evaluation of Alternatives...

Introduction.

Summary of Screening of Alternatives.

Plans Eliminated from Further Study

Plan 3..

Plan 4.

Plan 6 .........

Detailed Evaluation of Final Alternatives

No Action (Without Project Condition)

Plan 1.......

Plan 2....

Plan 5....

Economic Analysis

Benefit Categories.....

Cost Reduction Benefits..

Container Traffic Benefits

Bulk Traffic Benefits....

Tidal Delay Benefits..

Benefit/Cost Ratio and Net NED Benefit Comparisons..

Sensitivity Analysis......

Benefit/Cost Ratio Update Plan

Economic Impacts ....

Benefits....

Channel Deepening

Costs.

Environmental Impacts...

Water Quality

Salinity

Salt Water Intrusion into Aquifers.

Wildlife

Wetlands..

Impacts from Construction

Impacts from Diposal ........

Impacts Due to Salinity Increases

Fisheries

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Report of the District nngineer-Continued
Environmental Impacts-Continued

DO Page

Benthics .........

135

Water Quality Surveillance..

136

Construction Constraints for Endangered Species.

139

Cultural Resources

141

General Impacts Related to Deepening.

141

Present Dredging Practices.......

141

Deepening Impacts

141

Resources in the Jetties and Bar Channels Area

142

Resources from Mile 0 to 4.5....

143

Resources from Mile 4.5 to 7.6..

144

Resources from Mile 7.6 to 13.2..

144

Resources from Mile 13.2 to 19.5.

146

Impacts from Disposal of Dredged Material

146

Plan 1-40 and Plan 1-42...

146

Plan 5-40........

146

Future Study Needs...

146

Hazardous and Toxic Wastes...

151

Suitability of Material for Ocean Disposal

151

Unresolved Environmental Issues .....

152

Coastal Zone Management Act Consistency.

152

Section 106 of the National Historic Preservation Act Compliance. 154

Comparison of Alternatives and Plan Selection.

154

Plan 1-40..

158

Plan 1-42..

159

160

No Action

161

Benefit/Cost Analysis

161

National Economic Development (NED) Plan

162

Cost Summary of NED Plan..

162

Locally Preferred Plan

163

Selected Plan .......

163

Engineering Analysis of Selected Plan

164

Design Vessel Criteria..

165

Channel Geometry...

165

Keel Clearance and Squat..

169

Advance Maintenance

171

Effects on Existing Turning Basins

174

Evaluation of Need for Ship Simulator Model

174

Predicted Shoaling and Bank Stability

175

Side Slope Stability .....

178

General

178

Impacts on Adjacent Lands and Structures..

178

Evaluation of Impacts and Design Considerations ..................... 178

Disposal Area Diking Plan

179

Other Considerations

179

Identification and Impacts of Hard Materials

179

Miscellaneous......

179

Channel Alignment Changes.

180

Obstructions...

180

Navigation Aids ...

182

Disposal of Dredged Material at Tybee Island.

183

Water

Quality Certification and Construction Constraints

184

Georgia Water Quality Certification.......

184

South Carolina Water Quality Certification

185

Real Estate Requirements.

186

SELECTED PLAN

Selected Plan.....

188

Channel Deepening.

188

Kings Island Turning Basin.

190

Disposal of Dredged Material.

190

Option for Disposal at Tybee Island.

190

Project Maintenance....

191

Cost Engineering .....

192

Cost Summary of Selected Plan

194

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Dear Mr. Speaker:

The Secretary of the Army recommends authorization for a deep draft navigation project for Savannah Harbor, Georgia. The proposal is described in the report dated June i, 1992, from the Chief of Engineers which includes other pertinent reports and comments. These reports are in partial response to a resolution by the Committee on Public Works of the United States House of Representatives, adopted October 12, 1972.

The views of the States of Georgia and South Carolina, the Departments of the Interior and Transportation, and the Environmental Protection Agency are set forth in the enclosed communications.

The recommended plan provides for deepening the entrance channel from 40 to 44 feet and the interior channels from 38 to 42 feet. Channel widths would remain the same as currently authorized. The recommended plan is a deviation from the national economic development plan which would provide a 42-foot-deep entrance channel and 40-foot-deep interior channels. Non-Federal interests request the deeper channels to meet local shipping objectives. All costs in excess of the cost of the national economic development plan are to be paid by non-Federal interests. The total first cost of the project is $38,540,000, with an estimated Federal cost of $11,834,000 and an estimated non-Federal cost of $26,710,000.

The office of Management and Budget advises that there is no objection to the submission of the report to the Congress.

A copy of its letter is enclosed in the report.

sincerely,

3study

G. Edward Dickey
Acting Assistant Secretary of the Army

(civil Works)

Enclosure

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