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What percentage of the approximately 15,000 miles of levees in US Army Corps of Engineers Levee Safety Program are operated and maintained by local sponsors?

1. 10%
2. 25%
3. 65%
4. 85% Approximately 85% of the 14,685 miles of levees in the National Levee Database are operated by local sponsors, not the US Army Corps of Engineers.
   

The median length of time homeowners maintain their flood insurance policies is:

1. 1 year
2. 2-4 years. The Wharton Center for Risk Management and Decision Processes analyzed the entire portfolio of the National Flood Insurance Program over the period 2000–2009. The median tenure of flood insurance in the country was 2 to 4 years. This finding is relatively stable over time and levels of flood hazard. (Source: http://opim.wharton.upenn.edu/risk/library/WRCib2011a_nfip_tenure.pdf )
3. 10 years
4. 30 years

The average age of levees in the U.S. is:

1. 21 years
2. 54 years
3. 90 years
4. Nobody knows. Although the average age of levees in the US Army Corps of Engineers National Levee Database is 54 years, this accounts for only 14,800 miles of an estimated 100,000 miles — or more — of levees in the United States.

How many miles of levees are estimated to be within the United States?

1. 10,000 miles
2. 50,000 miles
3. 100,000 miles. The National Committee on Levee Safety estimates there may be more than 100,000 miles of levees in the nation with tens of millions of people living behind them.
4. 500,000 miles

True or False? All levees in the United States are under the jurisdiction of the US Army Corps of Engineers.

False. The vast majority of the levees across the nation are not part of any federal program. There are approximately 14,800 miles of levee enrolled in US Army Corps of Engineers programs (including those built by the Corps and locally maintained) and another 14,000 -16,000 miles estimated to be operated by other federal agencies (US Bureau of Reclamation, National Resources Conservation Service).