Portneuf River at Topaz ID
USGS Site No: 13073000 • Portneuf River. • Bannock County, ID
Portneuf River at Topaz ID on the Portneuf River. is currently at 198 cfs (High — 89th percentile for this date) . Gage height: 3.05 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 | 87 | |
| 25th | Low threshold | 105 | |
| 50th (Median) | Normal (median) | 127 | |
| 75th | High threshold | 162 | |
| 95th | Very High threshold | 215 | Today: 198 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 | 201 | — |
| May 27, 2026 | 203 | — |
| May 26, 2026 | 206 | — |
| May 25, 2026 | 199 | — |
| May 24, 2026 | 192 | — |
| May 23, 2026 | 192 | — |
| May 22, 2026 | 193 | — |
| May 21, 2026 | 194 | — |
| May 20, 2026 | 199 | — |
| May 19, 2026 | 200 | — |
| May 18, 2026 | 202 | — |
| May 17, 2026 | 198 | — |
| May 16, 2026 | 199 | — |
| May 15, 2026 | 204 | — |
| Apr 20, 2026 | 126 | — |
| Apr 19, 2026 | 128 | — |
| Apr 18, 2026 | 131 | — |
| Apr 17, 2026 | 134 | — |
| Apr 16, 2026 | 135 | — |
| Apr 15, 2026 | 136 | — |
| Apr 14, 2026 | 137 | — |
| Apr 13, 2026 | 143 | — |
| Apr 12, 2026 | 141 | — |
| Apr 11, 2026 | 138 | — |
| Apr 10, 2026 | 137 | — |
| Apr 9, 2026 | 138 | — |
| Apr 8, 2026 | 138 | — |
| Apr 7, 2026 | 139 | — |
| Apr 6, 2026 | 139 | — |
| Apr 5, 2026 | 141 | — |
Station Information
- USGS Site No
- 13073000
- State
- ID
- County
- Bannock County
- Coordinates
- 42.6247, -112.0881
- Drainage Area
- 576 mi²
- Datum (ft)
- 4,921.8
- HUC Code
- 17040208
Flood Stage Thresholds
- Action Stage
- 3.5 ft
- Flood Stage
- 4.0 ft
Currently 0.97 ft below flood stage.
Recent Extremes
- Max discharge
-
240 cfsMay 13, 2025
- Min discharge
-
92 cfsSep 16, 2025
- Days at flood stage
- 0
Computed from the local daily-values archive.
Nearby Gauges
-
Marsh Creek near Mccammon IDVery Low7.0 mi · 23 cfs
-
Portneuf River at Pebble IDVery High9.3 mi · 269 cfs
-
Marsh Creek above Hawkins Creek near Virginia IDUnknown9.8 mi · 5 cfs
-
Portneuf River. at Inkom, IDUnknown14.2 mi · 47 cfs
- Unknown