Cross Florida Barge Canal Restudy Report, Summary

The objective of this study was to prepare a Restudy Report including an environmental assessment and analysis, engineering and cost studies, and updated economic studies on various alternatives for the Cross Florida Barge Canal Project. Detailed engineering, economics and environmental results are presented in separate documents and summarized herein. An environmental impact statement was prepared to accompany the Restudy Report. The basic framework for the studies was regional in scope and included baseline conditions as well as future conditions expected with and without the alternatives studied. Study area delineation was based upon the economic, social, and environmental systems involved. The overall Restudy Report addresses all major issues that have surfaced during the history of the project. These issues are discussed in the Engineering and Economics Reports and in the Environmental Impact Statement (EIS) and the Environmental Report and are summarized herein. PALMM

Plan of study for Cross Florida Barge Canal: Economic Analysis

At the time of the previous study of transportation savings, commerce in coal primarily for electric power generation could not be ·projected with any degree of accuracy because most electric utilities had not developed firm plans for building new coal-fired plants· or for converting from petroleum products or natural gas to coal at existing plants. Today, with plants already constructed that will burn coal, there is a greater probability of defining coal needs. So there is a need to reevaluate potential coal traffic via the CFBC. Also there is a need to evaluate the other types of benefits mentioned under “SCOPE” since these were not fully evaluated in the previous study. In order to update and expand the economic analysis, the previous benefit analysis must be reexamined, with inclusion of coal transportation benefits, regional economic development benefits, area redevelopment benefits, and contingency benefits. Consultants would accomplish most of the work on transportation and regional benefits, and redevelopment and contingency benefits would be determined by inhouse analysis. The benefit reanalysis should revalidate or delete benefits accruing from previously claimed commodity movements, and also identify those from all potential new movements including coal. Engineering analysis by Jacksonville District would be limited to redetermination of costs for various scenarios, with no new design or environmental studies. Although outside the scope of this economic update, any significant new items which surface during this study that impact on the environmental aspects of the project will be appropriately noted. Detailed analysis will not be included at this time, but will be accomplished during final design prior to construction as appropriate

Model studies of the Portugues and Bucana Rivers channelization, Puerto Rico : hydraulic model investigation /

"May 1978.""Hydraulics Laboratory.""Final report."Cover title.Includes bibliographical references.Mode of access: Internet

Simulation for harvesting of aquatic plants /

At head of title: Aquatic Plant Control Research Program."Prepared for U.S. Army Engineer District, Jacksonville and Office, Chief of Engineers, U.S. Army.""February 1982."Cover title.Includes bibliographical references (page 49).Final report.Mode of access: Internet

Methodology-tidal computations for a sea-level canal /

Includes bibliographical references (pages 84-85).Mode of access: Internet

The Influence of Channel Deepening on Tides, River Discharge Effects, and Storm Surge

We combine archival research, semi-analytical models, and numerical simulations to address the following question: how do changes to channel geometry alter tidal properties and flood dynamics in a hyposynchronous, strongly frictional estuary with a landward decay in tidal amplitudes? Records in the Saint Johns River Estuary since the 1890s show that tidal range has doubled in Jacksonville, Florida. Near the estuary inlet, tidal discharge approximately doubled but tidal amplitudes increased only ~6%. Modeling shows that increased shipping channel depths from 5-6 to ~13m drove the observed changes, with other factors like channel shortening and width reduction producing comparatively minor effects. Tidal amplitude increases are spatially variable, with a maximum change 20-25 km from the estuary inlet; tidal theory suggests that increases in amplitude approximately follow , where x is the distance from the ocean and is a damping coefficient. Tidal changes are a predictor of altered surge dynamics: Numerical modeling of hurricane Irma under 1898 and 2017 bathymetric conditions confirms that both tidal and storm surge amplitudes are larger today, with a similar spatial pattern. Nonetheless, peak water levels are simulated to be larger under 1898 bathymetry. The cause is likely the record river discharge observed during the storm; as suggested by a subtidal water-level model, channel deepening since 1898 appears to have reduced the average surface slope required to drain both mean river flow and storm flows towards the ocean. Nonetheless, results suggest an increased vulnerability to storms with less river flow, but larger storm surge

Review of selected features of the Natural System Model, and suggestions for applications in South Florida /

Shipping list no: 97-0300-P."Natural System Model, regional scale model"--Cover.Includes bibliographical references (p. 15).Mode of access: Internet

Large-scale operations management test of use of the white amur for control of problem aquatic plants : report 1, baseline studies : volume II, the fish, mammals, and waterfowl of Lake Conway, Florida /

"Under Contract No. DACW39-76-C-0081."Cover title.Includes bibliographical references (pages 42-49).Mode of access: Internet