History of Flooding in Virginia: Keep the Uranium Mining Ban

Explanation -- Percentile Range
Lowest	< 10	10 - 24	25 - 75	76 - 90	>90	Highest	No

Computed runoff in hydrologic units
(Warning: Runoff values estimated prior to 1950 are subject to
significant uncertainty due to sparseness of the streamgaging network.)

http://waterwatch.usgs.gov/index.php?id=romap3