A monitoring map tracks interrupted observation

USGS’s October 28 description of its expanded Networks at Risk mapper reaches beyond streamgages to all its monitoring locations. A threatened activity may still operate; a discontinued one has stopped; a rescued one returned to full operation. Discontinued and rescued entries remain visible for 13 months. Historical measurements remain accessible, so ending collection does not erase the archive. ^[1]

That distinction matters because an automated station is not maintenance-free. USGS’s streamgaging explanation describes water-level sensors, site-specific relationships converting level to flow, and repeated field measurements after channel changes. Streamflow feeds flood forecasts, water management and infrastructure design; a surviving historical series cannot itself provide a new observation. ^[2]

The agency’s separate network overview describes mixed federal and partner funding, standardized methods and provisional readings awaiting scientific review. Monitoring can be continuous, seasonal or limited to a particular study. A map status therefore needs its activity and time context; it is not a count of all rivers losing observation. ^[3]

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