Portneuf River at Topaz
Future / Actual / Minor
OWP 2.0 WWA Modal Title
01/11/2021, 10:04 PM UTC through 01/11/2021, 10:04 PM UTC
Sender
Sent
- Upstream gauge unavailableWarning: no valid ratings curve available. Transformations to and from FEET/CFS/KCFS will not happen.
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Observed (OBS) 06/22/2025 2:15 PM MDTOfficial Forecast (FCST) 06/22/2025 9:18 AM MDTRecord: 6 ftCATEGORY STAGE 
Minor Flooding 4.02 ft Action 3.5 ft Reliability of the Forecast:
NOTE: Forecasts are not available. Only observed stages are available for this point.
National Water Model Hydrograph
Official NWS streamflow forecasts are produced by NWS hydrologic forecasters for river gauge locations using hydrologic models which are calibrated to that location. This process considers additional guidance and information, including local expertise and experience, to produce the best forecast possible. The NWM output provides supplemental guidance to NWS forecasters and should not be considered an official NWS river forecast.
Flood Impacts
- 4.02 - Lowland and crop field flooding possible from Pebble Creek to Inkom.
- 3.5 - Near bankfull from Pebble Creek Road downstream to Inkom. Isolated ponding in flat areas near Symons Road.
Gauge Info
| Coordinates | 42.6251, -112.088 |
| RFC | NWRFC |
| State | ID |
| WFO | PIH |
| County | Bannock |
| Data Provider(s) | |
| US Geological Survey | USGS--Water Resources of the United States |
| USGS | 13073000 |
Gauge Location
Recent Crests
| 1. | 3.11 ft | on 05-08-2022 |
| 2. | 3.28 ft | on 06-07-2021 |
| 3. | 3.44 ft | on 05-03-2020 |
| 4. | 3.72 ft | on 06-02-2019 |
| 5. | 4.92 ft | on 03-23-2018 |
Recent Crests
| 1. | 3.11 ft | on 05-08-2022 |
| 2. | 3.28 ft | on 06-07-2021 |
| 3. | 3.44 ft | on 05-03-2020 |
| 4. | 3.72 ft | on 06-02-2019 |
| 5. | 4.92 ft | on 03-23-2018 |
| 6. | 4.51 ft | on 02-22-2017 |
| 7. | 3.17 ft | on 04-14-2016 |
| 8. | 2.92 ft | on 05-16-2015 |
| 9. | 3.55 ft | on 02-15-2014 |
| 10. | 2.79 ft | on 03-21-2013 |
| 11. | 3.75 ft | on 01-21-2012 |
| 12. | 4.83 ft | on 05-15-2011 |
| 13. | 3.89 ft | on 06-08-2010 |
| 14. | 3.83 ft | on 06-12-2009 |
| 15. | 3.25 ft | on 04-15-2008 |
| 16. | 4.04 ft | on 02-11-2007 |
| 17. | 5.00 ft | on 05-02-2006 |
| 18. | 3.48 ft | on 05-17-2005 |
| 19. | 5.24 ft | on 05-18-1997 |
| 20. | 5.39 ft | on 05-18-1996 |
| 21. | 5.42 ft | on 05-21-1984 |
| 22. | 5.20 ft | on 05-31-1983 |
| 23. | 5.59 ft | on 02-20-1980 |
| 24. | 5.27 ft | on 04-10-1976 |
| 25. | 5.32 ft | on 05-14-1971 |
| 26. | 5.56 ft | on 01-22-1969 |
| 27. | 6.00 ft | on 12-23-1964 |
| 28. | 5.71 ft | on 02-25-1957 |
Historic Crests
| 1. | 6.00 ft | on 12-23-1964 |
| 2. | 5.71 ft | on 02-25-1957 |
| 3. | 5.59 ft | on 02-20-1980 |
| 4. | 5.56 ft | on 01-22-1969 |
| 5. | 5.42 ft | on 05-21-1984 |
Historic Crests
| 1. | 6.00 ft | on 12-23-1964 |
| 2. | 5.71 ft | on 02-25-1957 |
| 3. | 5.59 ft | on 02-20-1980 |
| 4. | 5.56 ft | on 01-22-1969 |
| 5. | 5.42 ft | on 05-21-1984 |
| 6. | 5.39 ft | on 05-18-1996 |
| 7. | 5.32 ft | on 05-14-1971 |
| 8. | 5.27 ft | on 04-10-1976 |
| 9. | 5.24 ft | on 05-18-1997 |
| 10. | 5.20 ft | on 05-31-1983 |
| 11. | 5.00 ft | on 05-02-2006 |
| 12. | 4.92 ft | on 03-23-2018 |
| 13. | 4.83 ft | on 05-15-2011 |
| 14. | 4.51 ft | on 02-22-2017 |
| 15. | 4.04 ft | on 02-11-2007 |
| 16. | 3.89 ft | on 06-08-2010 |
| 17. | 3.83 ft | on 06-12-2009 |
| 18. | 3.75 ft | on 01-21-2012 |
| 19. | 3.72 ft | on 06-02-2019 |
| 20. | 3.55 ft | on 02-15-2014 |
| 21. | 3.48 ft | on 05-17-2005 |
| 22. | 3.44 ft | on 05-03-2020 |
| 23. | 3.28 ft | on 06-07-2021 |
| 24. | 3.25 ft | on 04-15-2008 |
| 25. | 3.17 ft | on 04-14-2016 |
| 26. | 3.11 ft | on 05-08-2022 |
| 27. | 2.92 ft | on 05-16-2015 |
| 28. | 2.79 ft | on 03-21-2013 |
Vertical Datum Table
| type | NGVD29 |
|---|---|
| major Flooding | N/A |
| moderate Flooding | N/A |
| minor Flooding | 4922.02 ft |
| action | 4921.50 ft |
| Latest Value | 4920.94 ft |
| Gauge Zero | 4918.00 ft |
Gauge Photos
No Images Found
Unique Local Info
Historical Peak Flows     (Scroll to Streamflow Statistics for more years)
USGS Historical Peak Flows Explanation
Graphical View of Historical Peak Flows and Gage AnalysisÂ
25 Â Â Year Peak Flood 1610 CFS or 5.53 ft
50 Â Year Peak Flood 2100 CFS
100 Year Peak Flood 2730 CFS
200 Year Peak Flood 3510 CFS
500 Year Peak Flood 4860 CFS
Collaborative Agencies
The National Weather Service prepares its forecasts and other services in collaboration with agencies like the US Geological Survey, US Bureau of Reclamation, US Army Corps of Engineers, Natural Resource Conservation Service, National Park Service, ALERT Users Group, Bureau of Indian Affairs, and many state and local emergency managers across the country. For details, please click here.