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Streamflow Measurements for the Nation

! Streamflow measurement pages will be decommissioned in early 2026. Please find the modernized pages in WDFN that suit you best. Learn more about our modernization plans and timeline and new pages.

USGS 50038100 RIO GRANDE DE MANATI AT HWY 2 NR MANATI, PR

Manati Municipio, Puerto Rico
Hydrologic Unit Code 21010002
Latitude  18°25'51.49", Longitude  66°31'36.69" NAD27
Drainage area 203  square miles
Contributing drainage area 165  square miles
Gage datum 14 feet above NGVD29

Period of record
Begin Date End Date Count
1969-05-21 2025-12-03 397

 
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