----------------------------Original message---------------------------- Dear Netters: I am seeking any leads or information as to where can I get hydrologic unit codes in 11 or 14 digits. USGS information is in 8 digit coding for surface water stations. Any help will be appreciated. I can be contacted via e-mail at [log in to unmask] or by voice message at 510-231-1499. My fax number is 510-231-5062. Thx, Paul