Major Flood
16 ft
Current Water Level
Gage Height
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Streamflow
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Last Reading
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FLOOD STAGES
Know the flood categories.
Flood stages defined by the National Weather Service. Gage height data from USGS Water Resources.
Moderate Flood
13 ft
Minor Flood
11 ft
Action Stage
8 ft
What Floods at Each Level
19 ft
The Schwenksville Sewer and Water Plant floods as does Route 73/Haldeman Road.
18 ft
Smaller tributaries are affected by high water from the Perkiomen. Flooding is possible near the Route 113 Bridge in Perkiomen Township.
16 ft
Collegeville businesses on Route 29, between East Ninth Avenue and East Main Street, begin to take on water.
15 ft
East Main Street in Collegeville floods.
14 ft
Storm sewers back up in Collegeville and flood Route 29.
13 ft
First Avenue in Collegeville becomes impassable.
12 ft
Portions of Central Perkiomen Park in Collegeville are flooded. Flood waters expand onto and to the west of First Avenue in Collegeville.
11 ft
Graterford Road and Penitentiary Bridge are closed due to flooding.
8 ft
Park Avenue in Schwenksville is flooded. The Perkiomen Trail is flooded in Perkiomen Township at Plank Road and Route 113.
Impact statements from the National Weather Service, describing what typically happens at each water level.
7-Day Water Level Chart
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Historic Crests
| Date | Stage | Flow |
|---|---|---|
| Sep 1, 2021 | 24.23 ft | 45,274 cfs |
| Aug 4, 2020 | 19.32 ft | 44,613 cfs |
| Jul 8, 1935 | 18.26 ft | 39,900 cfs |
About This Gauge
USGS Site
NWS LID
GRAP1
River
Perkiomen Creek
County
Montgomery, PA
Coordinates
40.2294°N, 75.4519°W
Get Flood Alerts for Perkiomen Creek
StormCast monitors this gauge and sends a push notification to your phone when the water level crosses into a new flood category — even at 3 AM.
Frequently Asked Questions
What is the current water level of Perkiomen Creek at Graterford?
The Perkiomen Creek at Graterford gauge is maintained by USGS (site 01473000) and reports water levels every 15 minutes. Visit this page to see the latest reading updated live, or download StormCast to get push alerts when levels rise.
What is flood stage for Perkiomen Creek at Graterford?
The NWS-defined flood stage for Perkiomen Creek at Graterford is 11 feet. Action stage begins at 8 feet. Moderate flooding starts at 13 feet, and major flooding at 16 feet.
How do I get alerts when Perkiomen Creek rises?
Download StormCast free on Google Play, go to River Gauges, and add Perkiomen Creek at Graterford to your watchlist. StormCast will send a push notification to your phone whenever the water level crosses into a new NWS flood category.
Where is the Perkiomen Creek at Graterford gauge located?
The gauge is located in Montgomery County, Pennsylvania at coordinates 40.2294°N, 75.4519°W. USGS site number: 01473000. Data is provided by the U.S. Geological Survey and the National Weather Service.
More Gauges on Perkiomen Creek
On This River
Upstream: Perkiomen Creek at East Greenville
More Resources
Source & Notes
Data provided by: US Geological Survey, Observations courtesy of U.S. Geological Survey