Rock Creek at Joyce Road Washington, DC
USGS Site No: 01648010 • Rock Creek • District of Columbia, DC
Rock Creek at Joyce Road Washington, DC on the Rock Creek is currently at 43 cfs (Normal — 37th percentile for this date) . Gage height: 1.62 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 | 16 | |
| 25th | Low threshold | 27 | |
| 50th (Median) | Normal (median) | 60 | Today: 43 cfs |
| 75th | High threshold | 212 | |
| 95th | Very High threshold | 0 |
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 | 59 | — |
| May 27, 2026 | 70 | — |
| May 26, 2026 | 107 | — |
| May 24, 2026 | 655 | — |
| May 23, 2026 | 243 | — |
| May 22, 2026 | 83 | — |
| May 21, 2026 | 180 | — |
| May 20, 2026 | 17 | — |
| May 19, 2026 | 16 | — |
| May 18, 2026 | 17 | — |
| May 17, 2026 | 17 | — |
| May 16, 2026 | 19 | — |
| May 15, 2026 | 24 | — |
| Apr 21, 2026 | 20 | — |
| Apr 20, 2026 | 24 | — |
| Apr 19, 2026 | 24 | — |
| Apr 18, 2026 | 22 | — |
| Apr 17, 2026 | 22 | — |
| Apr 16, 2026 | 24 | — |
| Apr 15, 2026 | 24 | — |
| Apr 14, 2026 | 25 | — |
| Apr 13, 2026 | 25 | — |
| Apr 12, 2026 | 26 | — |
| Apr 11, 2026 | 27 | — |
| Apr 10, 2026 | 28 | — |
| Apr 9, 2026 | 30 | — |
| Apr 8, 2026 | 32 | — |
| Apr 7, 2026 | 36 | — |
| Apr 6, 2026 | 56 | — |
| Apr 5, 2026 | 112 | — |
Station Information
- USGS Site No
- 01648010
- State
- DC
- County
- District of Columbia
- Coordinates
- 38.9602, -77.0421
- Drainage Area
- 64 mi²
- Datum (ft)
- 136.4
- HUC Code
- 020700100102
Flood Stage Thresholds
- Action Stage
- 4.9 ft
- Flood Stage
- 7.0 ft
- Moderate Flood
- 10.0 ft
Currently 5.38 ft below flood stage.
Recent Extremes
- Max discharge
-
773 cfsJul 19, 2025
- Min discharge
-
7 cfsOct 25, 2025
- Days at flood stage
- 0
Computed from the local daily-values archive.
Nearby Gauges
-
Fourmile Run at Alexandria, VALow8.4 mi · 4 cfs
-
Patapsco River Near Catonsville, MDNormal25.0 mi · 123 cfs
-
Patapsco River Near Elkridge, MDNormal25.2 mi · 132 cfs
-
East Branch Herbert Run at Arbutus, MDNormal27.0 mi · 1 cfs
-
Patapsco River at Hollofield, MDNormal27.6 mi · 92 cfs