Where is bonnet carre spillway

Also of concern were the poor foundation conditions at the site -- would they support the massive concrete structure? A series of preliminary investigations were conducted to address the design concerns and ensure an effective and high quality construction project.

Three separate studies were performed on-site. The first of these were site and foundation studies to determine the properties of the soil. Piling tests were undertaken to compare the qualities of wooden and concrete pilings. The tests indicated that long timber piles, in the range of 70 feet, would be quite adequate if sufficient numbers were driven under the structure.

Untreated piles were selected after examining the Robert E. This is just the 12th time since it became operational in that the Spillway has been used, and the first time since January Opening of the spillway is expected to keep the Mississippi River below its foot flood stage in New Orleans; levees there protect the city against floods three feet higher than that. The last time all bays were opened was in This year, the Army Corps is anticipating opening about half of the bays, and the spillway is scheduled to operate for 2 — 4 weeks.

The all-time record crest there was A swath from Michigan to Louisiana set February records for the highest amount of water vapor observed in the atmosphere, helping trigger the wettest February on record for Arkansas, Illinois, Indiana, Missouri, Pennsylvania and Tennessee.

Outside of flood season, the spillway attracts tens of thousands of people every year for fishing, crawfishing, hunting, dog training, camping, wildlife watching, ATV and motorcycle riding and model airplane flying. Email Drew Broach at dbroach theadvocate. Email Mark Schleifstein at mschleifstein nola. Edit Close.

Toggle navigation. Close 1 of 4. Staff photo by Max Becherer. The Times-Picayune. The Times-Picayune archive. Very recent data Presley and others, show that the concentration of many contaminants in Mississippi River sediments rose sharply after World War II, peaked in the 's, and has decreased sharply since that time. An example for lead is shown in figure Core data have been shown to have close correlation with particulate matter composition in the river itself Trefry, Metz and others, ; Metz, ; Trefry and others, National efforts to reduce pollutant discharge to the air and water have reduced the metal concentration of Mississippi River sediment in the last 25 years.

More recent influxes of sediment from the Mississippi River probably have substantially lower metal and organic contaminant burdens than they did 25 years ago. Drawing in part on studies of Mississippi Delta sediments, the Discussion offers a more in-depth review of the role of Mississippi River influxes during the opening of the spillway. It also provides estimates of the metal proportions likely to be of pollutant origin in Lake Pontchartrain surficial sediments.

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