Ontonagon River Near Rockland, MI
USGS Site No: 04040000 • Ontonagon River • Ontonagon County, MI
Ontonagon River Near Rockland, MI on the Ontonagon River is currently at 702 cfs (Normal — 29th percentile for this date) . Gage height: 5.73 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 | 538 | |
| 25th | Low threshold | 651 | |
| 50th (Median) | Normal (median) | 944 | Today: 702 cfs |
| 75th | High threshold | 1,370 | |
| 95th | Very High threshold | 2,870 |
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 29, 2026 | 703 | — |
| May 28, 2026 | 714 | — |
| May 27, 2026 | 725 | — |
| May 26, 2026 | 737 | — |
| May 25, 2026 | 758 | — |
| May 24, 2026 | 792 | — |
| May 23, 2026 | 819 | — |
| May 22, 2026 | 882 | — |
| May 21, 2026 | 1,040 | — |
| May 20, 2026 | 1,090 | — |
| May 19, 2026 | 954 | — |
| May 18, 2026 | 830 | — |
| May 17, 2026 | 771 | — |
| May 16, 2026 | 800 | — |
| May 15, 2026 | 861 | — |
| Apr 21, 2026 | 5,580 | — |
| Apr 20, 2026 | 7,110 | — |
| Apr 19, 2026 | 9,500 | — |
| Apr 18, 2026 | 14,800 | — |
| Apr 17, 2026 | 13,100 | — |
| Apr 16, 2026 | 13,200 | — |
| Apr 15, 2026 | 15,100 | — |
| Apr 14, 2026 | 17,300 | — |
| Apr 13, 2026 | 17,900 | — |
| Apr 12, 2026 | 10,500 | — |
| Apr 11, 2026 | 4,030 | — |
| Apr 10, 2026 | 3,710 | — |
| Apr 9, 2026 | 3,680 | — |
| Apr 8, 2026 | 2,270 | — |
| Apr 7, 2026 | 2,330 | — |
Station Information
- USGS Site No
- 04040000
- State
- MI
- County
- Ontonagon County
- Coordinates
- 46.7208, -89.2071
- Drainage Area
- 1,340 mi²
- Datum (ft)
- 638.7
- HUC Code
- 04020102
Flood Stage Thresholds
- Action Stage
- 23.0 ft
- Flood Stage
- 25.0 ft
- Moderate Flood
- 26.0 ft
- Major Flood
- 28.0 ft
Currently 19.27 ft below flood stage.
Recent Extremes
- Max discharge
-
17,900 cfsApr 13, 2026
- Min discharge
-
502 cfsJun 26, 2025
- Days at flood stage
- 0
Computed from the local daily-values archive.
Nearby Gauges
-
West Branch Ontonagon River Near Bergland, MINormal18.4 mi · 75 cfs
-
Sturgeon River Near Alston, MINormal25.8 mi · 280 cfs
-
Middle Branch Ontonagon River Near Paulding, MINormal25.9 mi · 126 cfs
-
Sturgeon River Near Sidnaw, MILow31.4 mi · 75 cfs
-
Cisco Branch Ontonagon River at Cisco Lake Outlet, MIVery Low34.3 mi · 2 cfs