Monocacy River near Frederick at Interstate 70
Maryland — Water Level & Flood Stage
Located in Frederick County, Maryland on the Monocacy River. Live water level data from USGS gauge 01643000, updated every 15 minutes.
Current Water Level
Gage Height
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Streamflow
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Last Reading
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Flood Stages
Major Flood
20 ft
27,150 cfs
Moderate Flood
17 ft
19,920 cfs
Minor Flood
15 ft
15,680 cfs
Action Stage
13 ft
Flood stages defined by the National Weather Service. Gage height data from USGS Water Resources.
What Floods at Each Level
30 ft
Water reaches the second floor of Gambrill Mill on the Monocacy National Battlefield.
24 ft
Water approaches Urbana Pike near Monocacy National Battlefield.
21 ft
Maryland Route 26 is flooded near the Monocacy River bridge.
20 ft
Water reaches Gambrill Mill on the Monocacy National Battlefield.
17 ft
Significant lowland flooding is occurring along the river, with backwater flooding also occurring. Numerous roads are closed. Water is approaching the parking lot at Gambrill Mill on the Monocacy National Battlefield. Backwater flooding from Carroll Creek is likely approaching the underside of the bridge leading to the Frederick city wastewater treatment plant.
16 ft
Much of Pinecliff Park and Rivermist Park in Frederick are flooded. Buckeystown Community Park is also flooded with water approaching the parking lot. Waters are also approaching the Frederick city wastewater treatment plant and the Ballenger Creek wastewater treatment plant. Significant backwater flooding is occurring. Several roads will be closed along the river and adjoining creeks.
15 ft
Both banks of the river are flooded. Water begins to flood low-lying fields at Monocacy National Battlefield. Water reaches the access road of the Frederick city wastewater treatment plant. Backwater flooding is occurring on several area creeks, particularly Carroll Creek in Frederick.
14 ft
Two low-water crossings, one on Michaels Mill Road /State Route 880/ in Buckeystown, and one on Retreat Road north of Frederick, begin to flood.
13 ft
Water covers portions of Pinecliff Park in southeast Frederick. Water also approaches Rivermist Park in northeast Frederick.
10 ft
The east side of the Monocacy River, or left bank, begins to flood east of Frederick. Although no structures are affected, water approaches an access road at Pinecliff Park.
5 ft
After rain events, the river may become hazardous for recreational purposes when stages are over 5 feet.
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 |
|---|---|---|
| Jun 22, 1972 | 35.9 ft | 81,600 cfs |
| Jun 22, 1972 | 35.9 ft | 81,600 cfs |
| Sep 25, 1975 | 30.8 ft | 61,200 cfs |
| Sep 25, 1975 | 30.8 ft | 61,200 cfs |
| Aug 23, 1933 | 28.1 ft | 51,000 cfs |
About This Gauge
USGS Site
NWS LID
FDKM2
River
Monocacy River
County
Frederick, MD
Coordinates
39.4028°N, 77.3661°W
Get Flood Alerts for Monocacy River
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 Monocacy River near Frederick at Interstate 70?
The Monocacy River near Frederick at Interstate 70 gauge is maintained by USGS (site 01643000) 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 Monocacy River near Frederick at Interstate 70?
The NWS-defined flood stage for Monocacy River near Frederick at Interstate 70 is 15 feet. Action stage begins at 13 feet. Moderate flooding starts at 17 feet, and major flooding at 20 feet.
How do I get alerts when Monocacy River rises?
Download StormCast free on Google Play, go to River Gauges, and add Monocacy River near Frederick at Interstate 70 to your watchlist. StormCast will send a push notification to your phone whenever the water level crosses into a new NWS flood category — even when your screen is off.
Where is the Monocacy River near Frederick at Interstate 70 gauge located?
The gauge is located in Frederick County, Maryland at coordinates 39.4028°N, 77.3661°W. USGS site number: 01643000. Data is provided by the U.S. Geological Survey and the National Weather Service.
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Source & Notes
Data provided by: US Geological Survey, Observations courtesy of U.S. Geological Survey
- Stage may be affected by ice.