USGS Streamgage 08401500
Pecos River below Brantley Dam near Carlsbad, NM
Pecos River below Brantley Dam near Carlsbad, NM is USGS streamgage 08401500 in New Mexico, monitoring river discharge in hydrologic subbasin 13060011. It drains a watershed of about 17,650 square miles. Discharge records at this site go back to 1971. Typical flow runs near 190.7 cfs in July and 214 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- New Mexico
- Drainage area
- 17,650 sq mi
- Gauge elevation
- 3,193 ft
- Subbasin (HUC-8)
- 13060011
- Coordinates
- 32.54319, -104.3711
- USGS site number
- 08401500
- Records begin
- 1971-10-01 (55 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 55 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 | 4 | 24.9 | 65.7 | |
| February | 16.4 | 26 | 93.7 | |
| March | 19.3 | 50.5 | 165.3 | |
| April | 50.6 | 214 | 342.9 | |
| May | 34 | 169.2 | 347.3 | |
| June | 32.1 | 204 | 370.1 | |
| July | 20.5 | 190.7 | 444.8 | |
| August | 19.4 | 175.5 | 346.5 | |
| September | 20.9 | 132.4 | 311.2 | |
| October | 20.5 | 117.4 | 312 | |
| November | 6.6 | 25 | 250.2 | |
| December | 1.7 | 24.2 | 67.6 |
All values in cubic feet per second (cfs).
Common questions
- When does Pecos River below Brantley Dam near Carlsbad, NM normally run highest?
- April, on the long-term record. The median daily flow that month is about 214 cfs, against 24.2 cfs in December, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
- What is a normal flow for Pecos River below Brantley Dam near Carlsbad, NM?
- It depends on the month. In January, half of days historically fall near 24.9 cfs, with the middle 80% of days between 4 and 65.7 cfs. The month-by-month table on this page gives the full range.
- How long has Pecos River below Brantley Dam near Carlsbad, NM been measured?
- Discharge records at USGS site 08401500 begin in 1971, about 55 years, covering roughly 9,126 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
- Where is Pecos River below Brantley Dam near Carlsbad, NM?
- The gauge sits at 32.54319, -104.3711, in New Mexico, in hydrologic subbasin 13060011, at an elevation of about 3,193 feet, draining roughly 17,650 square miles.
- Can I use Pecos River below Brantley Dam near Carlsbad, NM 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.
Other gauges in this subbasin
- Rocky Arroyo at Hwy Brd near Carlsbad, NM
- Pecos River at Damsite 3 near Carlsbad, NM
- Carlsbad Main Canal at Head near Carlsbad, NM
- Pecos River below Avalon Dam, NM
- Dark Canyon Draw near Whites City, NM
- Dark Canyon at Carlsbad, NM
- Pecos River below Dark Canyon at Carlsbad, NM
- Black River below Blue Springs near Whites City, NM