TidalMapMonocacy River at Bridgeport, MD Water Level Today
NWS river forecast
| When | Stage | Flow |
|---|
Forecast from the NOAA National Water Prediction Service. Issued a few times a day and only while a forecast is active. Not for navigation.
Last 30 days
About this gauge
USGS gauge 01639000 sits on the Monocacy River and reads everything draining 173 square miles of the Monocacy basin. Its datum sits 340 feet above sea level NAVD88. Daily flow has been on record here since 1942, 84 years of it.
Where this gauge sits in the drainage
No gauged site sits above this one on the mainstem, so this is the first published reading on the river. Downstream the next reading comes from Monocacy River at Monocacy Blvd at Frederick, MD at 703 square miles, so what passes this gauge is about 25% of the water measured there. Water passing here goes on to Monocacy River at Jug Bridge near Frederick, MD.
Normal flows here
The Monocacy River runs a median of 76 cfs at this gauge across 84 years of record. March is the fullest month at a median 208 cfs, and September the leanest at 12 cfs. The highest daily mean on record is 16,700 cfs in 1972, and the lowest is 0.0 cfs in 1966.
| Month | Median flow | Share of annual median |
|---|---|---|
| Jan | 120 cfs | 158% |
| Feb | 167 cfs | 220% |
| Mar | 208 cfs | 274% |
| Apr | 135 cfs | 178% |
| May | 88 cfs | 116% |
| Jun | 42 cfs | 55% |
| Jul | 21 cfs | 28% |
| Aug | 16 cfs | 21% |
| Sep | 12 cfs | 16% |
| Oct | 18 cfs | 24% |
| Nov | 56 cfs | 74% |
| Dec | 112 cfs | 147% |
Medians from the USGS daily-statistics record, 1942 to 2026. A month at 100% is running at its own long-term median.
Flood stages and record crests
The Monocacy River reaches flood stage at this gauge at 13 feet. NWS starts watching it at 11 feet. The highest crest on record is 25.4 feet, in June 1996.
| Category | Gage height |
|---|---|
| Action | 11 ft |
| Minor flooding | 13 ft |
| Moderate flooding | 21 ft |
| Major flooding | 25 ft |
| When | Crest |
|---|---|
| June 1996 | 25.4 ft |
| August 1933 | 25 ft |
| June 1972 | 24.1 ft |
| October 1976 | 23.2 ft |
| May 1943 | 20.5 ft |
Flood categories and crest history from the NOAA National Water Prediction Service, gauge BDGM2. Stages are gage height, not depth. Not for navigation.
Nearby river gauges
- Big Pipe Creek at Bruceville, MD
- Sams Creek at Mckinstrys Mill, MD
- Fishing Creek at Mountaindale, MD
- Monocacy River at Monocacy Blvd at Frederick, MD
- Cranberry Branch near Westminster, MD
- Linganore Creek at Linganore Rd near Frederick, MD
- Monocacy River at Jug Bridge near Frederick, MD
- Morgan Run near Louisville, MD
- Antietam Creek near Waynesboro, PA
- Beaver Run near Finksburg, MD
- North Branch Patapsco River at Cedarhurst, MD
- Catoctin Creek near Middletown, MD
Live streamflow and gage height: USGS gauge 01639000. Percentile context computed against the gauge's period of record. Not for navigation.
Open Monocacy River at Bridgeport, MD on the live chart →
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