101.1547°W) Lake Pontchartrain Causeway, Metairie, Louisiana, Southern; Mandeville, Louisiana, Northern. Lucin Cutoff railroad causeway across the Great Salt Lake in Utah, USA MacArthur Causeway, Florida, United States Mahim Causeway, Mumbai, India Pulaski Skyway Robert Moses Causeway, Bay Shore, Long Island, New York, United States () Rømødæmningen, 9km link between Rømø, and the Danish mainland Sanibel Causeway, Sanibel, Florida, United States Sloedam, Zeeland, Netherlands Swarkestone causeway, Derby, England, United Kingdom The Causeway, Western Australia Venice () Yolo Causeway, California, USA Ponte Conde de Linhares, Panjim, Goa, India. The 3.2 km route was the longest causeway in Asia at the time of its completion in 1634. Cherkasy Dam (:uk:Черкаська дамба), Ukraine Disadvantages Unlike tunnels or bridges, causeways do not permit shipping through the strait which can cause problems. In some cases, causeways were built with "gates" or other facilities to permit shipping to pass through. Ecological consequences Causeways affect currents and may therefore be involved in beach erosion or changed deposition patterns; this effect has been a problem at the Hindenburgdamm in northern Germany. During hurricane seasons, the winds and rains of approaching tropical storms—as well as waves generated by the storm in the surrounding bodies of water—make traversing causeways problematic at best and impossibly dangerous during the fiercest parts of the storms. For this reason (and related reasons, such as the need to minimize traffic jams on both the roads approaching the causeway and the causeway itself), emergency evacuation of island residents is a high priority for local, regional, and even national authorities. Causeways can separate populations of wildlife, putting further pressure on endangered species. Causeways can cause a mineral imbalance between portions of a body of water. For example, a causeway built in the Great Salt Lake has caused the northern half of the lake to have much higher salinity, to the point that the two halves show a major color imbalance (as can be seen in the image at right). Furthermore, the difference in salinity has become so severe that native brine shrimp cannot survive in much of the waters, with the northern part being too salty and the southern part being insufficiently salty. Gallery See also Causey Arch, County Durham, England Causewayed enclosure Kūlgrinda Sacbe References Further reading External links