Unnamed Tributary at New Alexandria Storm Water Pumping Station - Downstream

Highest listed crest 7.51 ftFlood stage 5.5 ft4 crests since 2013

The Unnamed Tributary at New Alexandria Storm Water Pumping Station - Downstream crested at major flood stage 1 time among the 4 crests the National Weather Service lists from 2013 to 2024. The highest, 7.51 ft on July 8, 2019, was major flooding, 2.01 feet above flood stage.

The gauge

Highest listed crest: 7.51 ft; July 8, 2019
Flood stage: 5.5 ft; Major flooding from 7.5 ft
Crests at major: 1; 90th of 242 gauges in Virginia
Most recent flood crest: January 10, 2024; 6.45 ft, minor flooding
Location: Fairfax County; Near Alexandria (3.3 mi), Washington (9.1 mi), Falls Church (9.8 mi)
Identifiers: NWS APSV2; No USGS station

Flood stages

The thresholds the National Weather Service uses for this gauge today, and how many listed crests reached each.

Flood categories, Unnamed Tributary at New Alexandria Storm Water Pumping Station - Downstream

Action stage	4.0	0	—	The level at which the NWS or its partners begin to take action
Flood stage (minor)	5.5	3	Jan 10, 2024	Minimal or no property damage, but possibly some public threat
Moderate flood stage	6.5	0	—	Some inundation of structures and roads near the stream
Major flood stage	7.5	1	Jul 8, 2019	Extensive inundation of structures and roads

Every listed crest

4 crests from 2013 to 2024. Filled: at or above flood stage. Hover a crest for its date and stage.

Crests at or above flood stage, by decade

These are the crests the local National Weather Service office lists for the gauge: the highest on record and recent crests. Lesser floods between them may be missing, so counts by decade are a floor.
Categories use today's flood stages. Levees, dams and channel changes since a crest can make old and new stages not directly comparable.

Highest crests

Highest listed crests, Unnamed Tributary at New Alexandria Storm Water Pumping Station - Downstream

1	Jul 8, 2019	7.51	+2.01	Major	—
2	Jan 10, 2024	6.45	+0.95	Minor	—
3	Jul 12, 2013	6.44	+0.94	Minor	—
4	Oct 29, 2021	6.42	+0.92	Minor	—

The worst floods along the Unnamed Tributary

For this gauge's highest crests, the other gauges on the Unnamed Tributary that crested above flood stage within a week.

October 29, 2021: 6.42 ft here, minor flooding

New Alexandria Tide GateVA · Oct 29, 2021 · 6.19 ft · Minor · its highest

Gauges on the Unnamed Tributary

Flood gauges sharing the river's name, linked within 80 miles of one another.

Flood gauges on the Unnamed Tributary

New Alexandria Storm Water Pumping Station - Downstream this gauge	VA	5.5	7.51 ft, Jul 8, 2019	1
New Alexandria Tide Gate	VA	5.5	6.19 ft, Oct 29, 2021	0
Middle River	MD	10.8	13.06 ft, Aug 7, 2018	0

Other gauges in Fairfax County

Flood gauges in Fairfax County

Woodburn Road / Strathmeade Springs	251.5	258.68 ft, Jul 13, 2025	0
Annandale	9.5	16.32 ft, Sep 8, 2011	3
Manassas Park	12.0	20.20 ft, Jul 22, 2018	0
Huntington - Metro Bridge	11.0	12.92 ft, Sep 9, 2011	0
McLean	9.0	10.54 ft, Dec 25, 2022	0
Browns Mill Road / Wolf Trap	195.0	196.37 ft, Jul 13, 2025	0
Great Falls	11.0	21.40 ft, Jun 22, 1972	1
Chantilly	9.0	9.21 ft, Sep 8, 2011	0
Fairview Lake	318.0	318.47 ft, Sep 8, 2011	0
New Alexandria Tide Gate	5.5	6.19 ft, Oct 29, 2021	0

Fairfax County: every hazard · River floods across the country · Virginia

NOAA National Water Prediction Service, gauge APSV2, retrieved October 30, 2026. Stages in feet on the gauge's own datum, not elevation. Crests are as the National Weather Service lists them; preliminary values may be revised.