Ship Navigation Simulation Study, Southern Branch of the Elizabeth River, Gilmerton and Interstate 64 Bridges, Norfolk, Virginia
Ship Navigation Simulation Study, Southern Branch of the Elizabeth River, Gilmerton and Interstate 64 Bridges, Norfolk, Virginia

Author: Dennis W. Webb

Publisher:

Published: 1995

Total Pages: 0

ISBN-13:

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The Southern Branch of the Elizabeth River is located in Norfolk, Portsmouth, and Chesapeake, VA. The existing l25-ft-span Gilmerton Bridges are positioned in the Southern Branch just south of an approximately 90-degree bend in the river. Therefore, inbound (southbound) vessels have very little room to line up with the bridges' fender system. Outbound ships have to turn to port immediately after passing through the bridge span or risk hitting a ship docked at a facility immediately north of the bridges. The navigation study was conducted using the U.S. Army Engineer Waterways Experiment Station Hydraulic Laboratory's ship/tow simulator facility. The objectives of the study were to (a) Evaluate the effects of extending the 40-ft-channel depth improvement to the Newton Creek Turning Basin. (b) Evaluate the 40-ft-channel deepening plan with widening as recommended by the 1989 study, and evaluate the effects of two proposed dock facilities on this channel plan. Each of these facilities will require removal of a channel marker. (c) Evaluate modifications of the Milldam Creek Turning Basin, with consideration to reducing impacts on wetlands and real estate requirements. (d) Evaluate navigation conditions for both ship and barge traffic through the existing 125-ft-wide Gilmerton Bridges and recommend a bridge span width for future construction. (e) Evaluate navigation conditions for barge traffic only through the existing 1 25-ft-wide 1-64 Bridge and recommend a bridge span width for future construction. (MM).

Ship Navigation Simulation Study, Jacksonville Harbor, St. Johns River, Florida; Volume 1: Main Text and Appendix A.
Ship Navigation Simulation Study, Jacksonville Harbor, St. Johns River, Florida; Volume 1: Main Text and Appendix A.

Author:

Publisher:

Published: 1998

Total Pages: 0

ISBN-13:

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The ship simulation study of St. Johns River, Jacksonville, Florida, included channel reaches from the outer entrance channel at the sea buoy to downtown Jacksonville, approximately 30 nautical miles. The study was performed to determine the effects of deepening the navigation channel from -38 ft msl to 42 ft msl. The proposed dredging would maintain the existing bank lines and bank slopes, extending the existing bank slope down to the deeper channel bottom, effectively reducing the channel width from 24 to 40 ft dependent on the bank slope. The initial plans examined were to deepen the entire channel without any widening and to deepen and widen the entire channeL Preliminary investigations conducted with pilots from the St Johns Pilots Association indicated that the unwidened channel would not seriously impact navigation, except for two away traffic. A third plan was developed that widened and deepened the channel reaches east of the Dames Point Bridge and only deepened the reaches west of the bridge, along with some realignments of reaches both east and west of the bridge. This plan, Plan C, was found to provide generally improved navigation as compared with the existing conditions.

Ship Navigation Simulation Study, Brunswick Harbor, Georgia
Ship Navigation Simulation Study, Brunswick Harbor, Georgia

Author: C. J. Huval

Publisher:

Published: 1998

Total Pages: 105

ISBN-13:

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Savannah District requested a navigation simulation study of Brunswick Harbor to determine both channel and bend widening requirements throughout the channel based on, primarily, real-time simulator experiments with the design ships, and the best design and placement of the East River turning basin. Navigation conditions (existing and proposed) were conducted using real-time piloted ship simulation experiments. A field data collection verified and adjusted a numerical hydrodynamic model of the tidal currents and the tidal sound and river system; and a hydrodynamic model of the existing and plan conditions was developed and adjusted based on field data. Also, two hydrodynamic models of design ships (a car-carrier for analyzing the South Brunswick Channel leading to the existing Colonels Island car facility, and a bulk carrier for analyzing the East River channel and turning basin) for experimenting due to the different navigation concerns associated with each ship type were developed. Channel deepening in Turtle River above the Brunswick and South Brunswick Rivers junction was not included in the study.

Ship Navigation Simulation Study, Alafia River, Tampa Bay, Florida
Ship Navigation Simulation Study, Alafia River, Tampa Bay, Florida

Author:

Publisher:

Published: 1998

Total Pages: 0

ISBN-13:

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A real time ship simulation investigation of the proposed design for deepening and widening the Alafia River Channel and turning basin, Tampa Bay, Florida, was conducted. Existing and proposed channel depths are 30 ft and 41 ft, respectively. The purpose of the study was to determine effects of proposed improvements on navigation with larger design ships and to assist in optimizing channel width and turning basin configuration required to efficiently navigate the study area. A numerical model of the existing channel from Hillsborough Bay Channel Cut C to the harbor area was developed. The model was verified by two members of the Tampa Bay Pilots Association. Numerical models of two plans were also developed. The investigation was conducted in Vicksburg, MS, on the U.S. Army Engineer Waterways Experiment Station ship simulator.