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.
In this interview, he describes how the Romans developed this elaborate system, which included aqueducts 60 miles long. Roman architects and hydraulic engineers built the magnificent water-transporting bridge known as Pont du Gard 2,000 years ago.