Allegheny River at Natrona Lock and Dam

Last updated: Jul 21, 2025, 2:38 AM UTC
No watches, warnings or advisories are in effect for this area.

Flood Impacts 🅘

  • 29.4 - Pennsylvania Railroad main line and sidings affected at Tarentum PA, 3 miles downstream floods.
  • 21.5 - The Natrona Water Company is affected.
  • 21.3 - Water begins to back up into the sewers at Braeburn Steel Co.

Gauge Info

Coordinates 40.6153, -79.7186
RFC OHRFC
State PA
WFO PBZ
County Allegheny
Data Provider(s)
US Geological Survey USGS--Water Resources of the United States
USGS 03049500
COE Website

Gauge Location

Recent Crests

1. 18.52 ft on 02-19-2022
2. 18.63 ft on 02-09-2019
3. 17.84 ft on 03-24-2007
4. 21.40 ft on 03-16-2007
5. 20.00 ft on 01-07-2005

Historic Crests

1. 32.10 ft on 03-18-1936
2. 28.40 ft on 12-30-1942
3. 27.60 ft on 01-22-1959
4. 27.50 ft on 06-23-1972
5. 26.40 ft on 03-10-1964

Vertical Datum Table

type NAVD88
major Flooding 761.80 ft
moderate Flooding 759.80 ft
minor Flooding 756.80 ft
action 753.00 ft
Latest Value 746.52 ft
Gauge Zero 735.80 ft

Gauge Photos

No Images Found

Probability Information

Photo 1 of 3

Unique Local Info

Potential River Levels - Used to

Potential River Levels
Used to Estimate the Chance of Flooding and the Range of Possible River Levels
10 Day (HEFS) 10 Day (NAEFS) 10 Day (GEFS)
HEFS Ensemble NAEFS Ensemble GEFS Ensemble

Note: Use the official hydrograph at the top of this web page for river levels within the next 72 hours.

Collaborative Agencies

The National Weather Service prepares its forecasts and other services in collaboration with agencies like the US Geological Survey, US Bureau of Reclamation, US Army Corps of Engineers, Natural Resource Conservation Service, National Park Service, ALERT Users Group, Bureau of Indian Affairs, and many state and local emergency managers across the country. For details, please click here.

WFO Information

Weather Forecast Office
Pittsburgh
192 Shafer Road
Moon Township, PA 15108
Official Homepage