USGS Streamgage 09394500
Little Colorado River at Woodruff, AZ
Little Colorado River at Woodruff, AZ is USGS streamgage 09394500 in Arizona, monitoring river discharge in hydrologic subbasin 15020002. It drains a watershed of about 8,072 square miles. Discharge records at this site go back to 1905. Typical flow runs near 7.3 cfs in July and 3.9 cfs in April, with the higher of the two arriving in July.
Gauge details
- State
- Arizona
- Drainage area
- 8,072 sq mi
- Gauge elevation
- 5,132 ft
- Subbasin (HUC-8)
- 15020002
- Coordinates
- 34.7825, -110.04396
- USGS site number
- 09394500
- Records begin
- 1905-03-16 (121 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 122 years of data), averaged within each month. These describe the historical normal range — they are not a forecast and not today's reading.
| Month | Low p10 | Typical p50 | High p90 | Range |
|---|---|---|---|---|
| January | 1.2 | 8 | 47 | |
| February | 0.7 | 8.2 | 103.1 | |
| March | 0.5 | 6.5 | 185 | |
| April | 0.1 | 3.9 | 136.7 | |
| May | 0 | 2 | 26.5 | |
| June | 0 | 0.8 | 6.7 | |
| July | 0.3 | 7.3 | 178.1 | |
| August | 1.6 | 19.7 | 359.4 | |
| September | 1.1 | 8.5 | 161.1 | |
| October | 1.2 | 5.8 | 60.2 | |
| November | 0.7 | 5.7 | 23.5 | |
| December | 1.2 | 6.6 | 34.6 |
All values in cubic feet per second (cfs).
Common questions
- When does Little Colorado River at Woodruff, AZ normally run highest?
- August, on the long-term record. The median daily flow that month is about 19.7 cfs, against 0.8 cfs in June, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
- What is a normal flow for Little Colorado River at Woodruff, AZ?
- It depends on the month. In January, half of days historically fall near 8 cfs, with the middle 80% of days between 1.2 and 47 cfs. The month-by-month table on this page gives the full range.
- How long has Little Colorado River at Woodruff, AZ been measured?
- Discharge records at USGS site 09394500 begin in 1905, about 121 years, covering roughly 9,056 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
- Where is Little Colorado River at Woodruff, AZ?
- The gauge sits at 34.7825, -110.04396, in Arizona, in hydrologic subbasin 15020002, at an elevation of about 5,132 feet, draining roughly 8,072 square miles.
- Can I use Little Colorado River at Woodruff, AZ data for flood or safety decisions?
- No. Rivermatics provides estimates, not guarantees, and the readings and forecasts here may be delayed, inaccurate, or wrong. Do not use them for navigation or for any safety, rescue, or emergency decision. Check the National Weather Service and USGS directly, and use your own judgment.