The US Geological Survey’s website hosts a wide range of hydrologic data products, including thematic map viewer options for the National Hydrography Data set; NHD Plus, and the Watershed Boundary Dataset (WBD):   https://nhd.usgs.gov/data.html.

Jacqueline V. Nolan

Cartographer

Library of Congress

From: Maps-L: Map Librarians, etc. [mailto:[log in to unmask]] On Behalf Of Susan M Peschel
Sent: Friday, December 08, 2017 11:54 AM
To: [log in to unmask]
Subject: Surface drainage information for Georgia

We have a patron looking for a detailed hydrologic unit map for Forsyth County, GA (Cumming Quad) or something showing surface drainage for that particular area.

Any suggestions would be appreciated.

Susan Peschel

AGS Library