Essentially, it's an estimate, a statistical calculation that helps the government determine floodplain maps, marking the boundary where there's a 1% chance of flooding in any single given year within ...

Updated maps from Williamson County show an increase of 6,000 structures in the 100-year flood plains. The last information ...

a statistical calculation that helps the government determine floodplain maps, marking the boundary where there's a 1% chance of flooding in any single given year within an average period of 100 ...