关键词: |
ENVIRONMENTS, DEMONSTRATIONS, NAVIGATION, CONGRESS, CONTROL SYSTEMS, DAMAGE, HAZARDS, RATES, EROSION, SEDIMENT TRANSPORT, WINTER, ENGINEERING, FEASIBILITY STUDIES, ICE, SURVEYS, RESPONSE(BIOLOGY), INSURANCE, SPILLING, SHORES, GREAT LAKES, SEASONS. |
摘要: |
In 1970, Congress authorized a three-part Great Lakes-St. Lawrence Seaway Navigation Season Extension Program. It authorized a winter navigation demonstration program, a detailed survey study of season extension feasibility and a study of insurance rates for shippers. This report provides a review of numerous environmental and engineering studies conducted as part of the demonstration and feasibility portions of the program, as well as many environmental studies conducted after the completion of the original program. Topics include sediment transport, shoreline erosion, shore structure damage, oil and hazardous substance spills, biological effects, ship-induced vibrations and ice control systems. |