USGS Surface Water for USA: Peak Streamflow

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Peak Streamflow for the Nation

USGS 15015595 UNUK R BL BLUE R NR WRANGELL AK

Ketchikan Gateway Borough, Alaska

Hydrologic Unit Code 190101050403

Latitude 56°14'26", Longitude 130°52'49" NAD27

Drainage area 745.0 square miles

Gage datum 150.0 feet above NGVD29

Water Year	Date	Gage Height (feet)	Stream- flow (cfs)
2004	2003-10-26	32.96	34,800
2005	2004-10-13	30.10	24,200
2006	2006-09-24	30.81	26,700
2007	2007-07-11	32.45	32,800
2018	2018-08-09	31.11	20,600
2019	2019-09-21	31.33	30,100
2020	2020-08-16	34.01	54,400
2021	2021-09-24	34.39	58,500
2022	2022-08-31	32.45	35,900
2023	2022-10-10	32.90	40,400
2024	2023-10-18	31.17	25,100

U.S. Department of the Interior | U.S. Geological Survey
Title: Surface Water for USA: Peak Streamflow
URL: https://staging.waterdata.usgs.gov/nwis/peak?

Page Contact Information: USGS Water Data Support Team
Page Last Modified: 2026-01-11 09:08:46 EST
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