Bynum Run at Bel Air, MD
USGS Site No: 01581500 • Bynum Run • Harford County, MD
Bynum Run at Bel Air, MD on the Bynum Run is currently at 6 cfs (Normal — 64th percentile for this date) . Gage height: 0.64 ft.
Reading from
Historical Percentile Comparison
Today's discharge compared to the long-term record for June 11 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 | 2 | |
| 25th | Low threshold | 3 | |
| 50th (Median) | Normal (median) | 4 | |
| 75th | High threshold | 7 | Today: 6 cfs |
| 95th | Very High threshold | 86 |
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 | 8 | — |
| May 27, 2026 | 17 | — |
| May 26, 2026 | 9 | — |
| May 25, 2026 | 14 | — |
| May 24, 2026 | 114 | — |
| May 23, 2026 | 56 | — |
| May 22, 2026 | 9 | — |
| May 21, 2026 | 13 | — |
| May 20, 2026 | 5 | — |
| May 19, 2026 | 4 | — |
| May 18, 2026 | 4 | — |
| May 17, 2026 | 4 | — |
| May 16, 2026 | 4 | — |
| May 15, 2026 | 4 | — |
| Apr 21, 2026 | 4 | — |
| Apr 20, 2026 | 5 | — |
| Apr 19, 2026 | 5 | — |
| Apr 18, 2026 | 4 | — |
| Apr 17, 2026 | 5 | — |
| Apr 16, 2026 | 5 | — |
| Apr 15, 2026 | 7 | — |
| Apr 14, 2026 | 6 | — |
| Apr 13, 2026 | 5 | — |
| Apr 12, 2026 | 5 | — |
| Apr 11, 2026 | 6 | — |
| Apr 10, 2026 | 6 | — |
| Apr 9, 2026 | 6 | — |
| Apr 8, 2026 | 6 | — |
| Apr 7, 2026 | 7 | — |
| Apr 6, 2026 | 9 | — |
Station Information
- USGS Site No
- 01581500
- State
- MD
- County
- Harford County
- Coordinates
- 39.5415, -76.3301
- Drainage Area
- 9 mi²
- Datum (ft)
- 249.9
- HUC Code
- 020600030103
Flood Stage Thresholds
- Action Stage
- 6.0 ft
- Flood Stage
- 9.0 ft
- Moderate Flood
- 13.0 ft
- Major Flood
- 17.0 ft
Currently 8.36 ft below flood stage.
Recent Extremes
- Max discharge
-
186 cfsMay 28, 2025
- Min discharge
-
2 cfsNov 4, 2025
- Days at flood stage
- 0
Computed from the local daily-values archive.
Nearby Gauges
-
Winters Run Near Benson, MDLow2.7 mi · 21 cfs
-
Winters Run Near Bel Air, MDNormal2.7 mi · 22 cfs
-
Plumtree Run Near Bel Air, MDLow3.3 mi · 1 cfs
-
Wheel Creek Near Abingdon, MDNormal4.2 mi · 0 cfs
-
Bynum Run Near Abingdon, MDVery High5.0 mi · 15 cfs