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Monitoring location Horseshoe LK 0.3 MI S Boat Launch NR Big Lake AK - USGS-613433149554700
Important for you to know:
- Big changes are coming soon to NWISWeb websites and services. Attend our webinar, January 15, 2026 at 2:00 PM EST, to learn about the impacts. Learn more about our modernization plans and timeline.
- Scheduled Maintenance NoticeUSGS will be performing maintenance on the time series data processing system beginning at 08:00 EST on January 13, 2026. During this period, delivery of the latest time series data will be delayed. The maintenance is expected to finish within 3 hours, after which all backlogged time series data will be processed and delivered to WDFN web portals and APIs.