Hydrographic and Impairment Statistics (HIS) is a National Park Service (NPS) Water Resources Division (WRD) project established to track certain goals created in response to...

(Note: title and unit link edited on 2/8/2017 from OBED to OBRI to reflect the current unit code). Hydrographic and Impairment Statistics (HIS) is a National Park Service (NPS)...