USGS Surface Water for USA: Peak Streamflow

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Peak Streamflow for the Nation

USGS 09400590 RIO DE FLAG @ HIDDEN HOLLOW RD @ FLAGSTAFF, AZ

Coconino County, Arizona

Hydrologic Unit Code 15020015

Latitude 35°14'31", Longitude 111°41'02" NAD27

Drainage area 31.5 square miles

Contributing drainage area 31.5 square miles

Gage datum 7,145 feet above NGVD29

Water Year	Date	Gage Height (feet)	Stream- flow (cfs)
1970	1970-08-03		2.00²
1971	1971-08		0.10^4,Bd
1972	1971-12-26	1.47	11.0
1973	1973-04-28	2.87	153
1974	1974		0.00^Bm
1975	1975		0.00^Bm
1976	1976		1.00^4,Bm
1977	1977		1.00^4,Bm
1978	1978-04	2.79^Bd	144^Bd
1979	1979-05	2.35^Bd	93.0^Bd
1980	1980-02-20	2.50	110
1981	1981		1.00^2,Bm
1982	1982-03-12	2.71	133

Peak Gage-Height Qualification Codes.

Peak Streamflow Qualification Codes.

2 -- Discharge is an Estimate
4 -- Discharge less than indicated value, which is Minimum Recordable Discharge at this site
Bd -- Day of occurrence is unknown or not exact
Bm -- Month of occurrence is unknown or not exact

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

Page Contact Information: USGS Water Data Support Team
Page Last Modified: 2025-07-16 23:21:07 EDT
0.34 0.33 nadww01