Thankfully, refineries can customize the product a bit for the market. They do this mostly to change the boiling point, but it affects freezing point too. Northern regions in winter will have gasoline with a lower freezing point. Southern Arizona in summer will have gasoline with a higher freezing point. Gas with ethanol will freeze lower. I would hazard a guess that for northern-state winter blend gas, going down to -70F (the freezing temperature of octane) is fine. Of course, that's probably all moot. Gasoline engines don't start when they get too cold, because the fuel doesn't vaporize properly.
Visitors Guide. Lake Pontchartrain Causeway. The Lake Pontchartrain Causeway holds the title for the longest bridge over water at 23 miles long. It officially opened in 1956, and cut travel time from North Shore communities to the city of New Orleans by 50 minutes.
The Julien Dubuque Bridge replaced an aging structure known locally as the High Bridge or Wagon Bridge.. Construction of the bridge was attributed in part to World War II and the need to facilitate military transportation. In 1942, the first parts of the bridge were begun. In 1943, the bridge was completed.he Bob Kerrey Pedestrian Bridge, opened September 28, 2008, and is one of the longest pedestrian bridges ever built. The total length of the bridge is 3,000 feet and the towers carry a unique curved 506-foot main span and two 253-foot back spans.