Rivers in Alaska
Gulkana River at the Richardson Highway near Gulkana
Below flood stage
6.17ftStage
Observed Tue, Sep 22, 10:02 AM UTC
- Flood stage
- 10.00 ft
- Forecast crest
- 6.53 ftThu, Sep 24, 6:00 AM UTC
- Record crest
- 18.45 ft1986
Flood stages and impacts
| Category | Stage |
|---|---|
| Moderate flood | 10.50 ft |
| Minor flood | 10.00 ft |
| Action | 9.00 ft |
- 31.30 ftBridge Low Cord
- 11.00 ftStage associated with flow (17700 cfs) having a recurrence interval of >50 years; major flooding would be expected on this and nearby streams
- 10.50 ftStage associated with flow (15800 cfs) having a recurrence interval of ~20-40 years; moderate flooding would be expected on this and nearby streams
- 10.00 ftStage associated with flow (12400 cfs) having a recurrence interval of ~10 years; minor flooding would be expected on this and nearby streams
- 9.50 ftBankfull conditions. Lower parking lot at Richardon Highway boat launch becomes flooded.
- 9.00 ftBankfull -- stage associated with flow (7700 cfs) having a recurrence interval of ~2 years
- 8.00 ftHigh water level -- Class III+ whitewater above Sourdough; Class II+ below Sourdough
- 7.00 ftMedium water level -- Class III whitewater above Sourdough; Class II below Sourdough
- 6.00 ftLow water level -- Class III whitewater above Sourdough; Class II below Sourdough
Flood outlook
Chance of flooding, September to November
| Category | Chance |
|---|---|
| Minor flooding | Under 5% |
| Moderate flooding | Under 5% |
| Major flooding | -99900% |
The three-month chances are the River Forecast Centers’ long-range flood outlook, issued September 1, 2026.
Crest history
39 crests on NOAA’s list since 1982.
| # | Date | Stage |
|---|---|---|
| 1 | May 11, 1986 | 18.45 ft |
| 2 | May 30, 2013 | 12.13 ft |
| 3 | May 12, 1982 | 11.65 ft |
| 4 | May 4, 2007 | 10.85 ft |
| 5 | December 29, 2000 | 10.71 ft |
| 6 | May 4, 1989 | 10.40 ft |
| 7 | June 18, 1985 | 10.35 ft |
| 8 | May 4, 2009 | 10.28 ft |
| 9 | June 2, 1988 | 10.00 ft |
| 10 | September 13, 1990 | 9.93 ft |
| 11 | June 18, 1984 | 9.75 ft |
| 12 | August 27, 1983 | 9.75 ft |
| 13 | May 6, 2011 | 9.74 ft |
| 14 | May 9, 1991 | 9.55 ft |
| 15 | June 15, 2012 | 9.38 ft |
| 16 | June 1, 2021 | 9.33 ft |
| 17 | May 12, 1992 | 9.30 ft |
| 18 | August 24, 2006 | 9.30 ft |
| 19 | May 13, 1993 | 9.09 ft |
| 20 | June 3, 1992 | 9.05 ft |
| 21 | June 2, 1997 | 8.95 ft |
| 22 | April 30, 2005 | 8.90 ft |
| 23 | May 9, 2004 | 8.90 ft |
| 24 | July 3, 2014 | 8.85 ft |
| 25 | May 10, 2015 | 8.79 ft |
Most recent crests
- June 1, 2021: 9.33 ft
- May 18, 2017: 7.35 ft
- July 26, 2016: 7.81 ft
- May 10, 2015: 8.79 ft
- July 3, 2014: 8.85 ft
- May 30, 2013: 12.13 ft
- June 15, 2012: 9.38 ft
- May 6, 2011: 9.74 ft
- July 25, 2010: 7.86 ft
- May 4, 2009: 10.28 ft
Nearby
Upstream, downstream and the gauges around this one.
What this means
Forecasts by the Alaska Pacific River Forecast Center. Forecasts are issued routinely during the warm season, and as needed at other times of the year. Gage data do not meet the quality standards of USGS gages. Stage may be affected by ice.
Sources
Stage, flood stages, impacts and crest history from NOAA’s National Water Prediction Service.