https://www.potomacriver.org/publications/groundwater-data-and-potentiometric-surface-maps-for-the-monocacy-watershed-model/
Groundwater Data and Potentiometric Surface Maps for the Monocacy Watershed Model - ICPRB
surface maps
https://digitalcollections.library.oregon.gov/nodes/view/167442
Map 6B - Southwest Oregon Statewide surface water maps and land use data | State Library of Oregon...
Date: 2017-2018 | Collection: Health Authority | Collection: Environmental Quality | Publication Set: Statewide surface water maps and land use data | Read the...