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Please Click on the Region Imagemap (17) Pacific Northwest (10) Missouri New England (01) (09) Souris Red River (04) Great Lakes (07) Upper Mississippi (02) Mid Atlantic (18) California (16) Great Basin (14) Upper Colorado (05) Ohio (15) Lower Colorado (11) Arkansas White Red (13) Rio Grande (03) South Atlantic Gulf (06) Tennessee (08) Lower Mississippi (12) Texas Gulf (19) Alaska (20) Hawaii (21) Caribbean Please Select a Hydrologic Unit Within the Map Area
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Last Modified: 14:34:40 Mon 23 Aug 2004
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