Monocacy River at Bridgeport, MD
USGS Site No: 01639000 • Monocacy River • Frederick County, MD
Monocacy River at Bridgeport, MD on the Monocacy River is currently at 123 cfs (High — 75th percentile for this date) . Gage height: 3.39 ft.
Reading from
Historical Percentile Comparison
Today's discharge compared to the long-term record for October 28 at this station. Percentile rank shows what fraction of historical years had lower flow on this date.
| Percentile | Label | CFS Threshold | Today's Flow |
|---|---|---|---|
| 10th | Very Low threshold | 8 | |
| 25th | Low threshold | 13 | |
| 50th (Median) | Normal (median) | 31 | |
| 75th | High threshold | 118 | |
| 95th | Very High threshold | 536 | Today: 123 cfs |
30-Day Hydrograph
Recent discharge plotted against the historical 10th–95th percentile envelope for the same calendar days. Source: USGS daily values + long-term statistics.
30-Day Flow History
| Date | Discharge (CFS) | Gage Ht (ft) |
|---|---|---|
| May 28, 2026 | 263 | — |
| May 27, 2026 | 217 | — |
| May 26, 2026 | 325 | — |
| May 25, 2026 | 576 | — |
| May 24, 2026 | 1,260 | — |
| May 23, 2026 | 873 | — |
| May 22, 2026 | 128 | — |
| May 21, 2026 | 36 | — |
| May 20, 2026 | 25 | — |
| May 19, 2026 | 27 | — |
| May 18, 2026 | 29 | — |
| May 17, 2026 | 31 | — |
| May 16, 2026 | 35 | — |
| May 15, 2026 | 43 | — |
| Apr 21, 2026 | 70 | — |
| Apr 20, 2026 | 98 | — |
| Apr 19, 2026 | 61 | — |
| Apr 18, 2026 | 57 | — |
| Apr 17, 2026 | 67 | — |
| Apr 16, 2026 | 86 | — |
| Apr 15, 2026 | 93 | — |
| Apr 14, 2026 | 63 | — |
| Apr 13, 2026 | 64 | — |
| Apr 12, 2026 | 70 | — |
| Apr 11, 2026 | 76 | — |
| Apr 10, 2026 | 80 | — |
| Apr 9, 2026 | 88 | — |
| Apr 8, 2026 | 100 | — |
| Apr 7, 2026 | 128 | — |
| Apr 6, 2026 | 235 | — |
Station Information
- USGS Site No
- 01639000
- State
- MD
- County
- Frederick County
- Coordinates
- 39.6791, -77.2345
- Drainage Area
- 173 mi²
- Datum (ft)
- 340.2
- HUC Code
- 02070009
Flood Stage Thresholds
- Action Stage
- 11.0 ft
- Flood Stage
- 13.0 ft
- Moderate Flood
- 21.0 ft
- Major Flood
- 25.0 ft
Currently 9.61 ft below flood stage.
Recent Extremes
- Max discharge
-
2,900 cfsMay 14, 2025
- Min discharge
-
3 cfsSep 16, 2025
- Days at flood stage
- 0
Computed from the local daily-values archive.
Nearby Gauges
-
Cranberry Branch Near Westminster, MDLow15.4 mi · 1 cfs
-
Morgan Run Near Louisville, MDNormal21.6 mi · 22 cfs
-
Beaver Run Near Finksburg, MDNormal22.0 mi · 11 cfs
-
North Branch Patapsco River at Cedarhurst, MDNormal22.3 mi · 47 cfs
-
Gunpowder Falls at Hoffmanville, MDNormal24.1 mi · 17 cfs