Rivermatics

USGS Streamgage 09046600

Blue River near Dillon, CO

Blue River near Dillon, CO is USGS streamgage 09046600 in Colorado, monitoring river discharge in hydrologic subbasin 14010002. It sits on the Blue River, alongside 4 other gauges Rivermatics tracks on the same river. It drains a watershed of about 123 square miles. Discharge records at this site go back to 1957. Typical flow runs near 154.2 cfs in July and 39.2 cfs in April, with the higher of the two arriving in July. Rivermatics issues a daily machine-learned flow outlook for this gauge, reaching 14 days ahead, alongside daily high and low water-temperature forecasts.

View live conditions & forecast →

Gauge details

State
Colorado
Drainage area
123 sq mi
Gauge elevation
9,036 ft
Subbasin (HUC-8)
14010002
Coordinates
39.56665, -106.04946
USGS site number
09046600
Records begin
1957-10-01 (69 years)
Rivermatics forecast
14-day flow outlook + water temperature

14-day flow forecast

Based on observations through for Blue River near Dillon, CO. Each day carries a median estimate and the band the model expects the flow to fall within — not a single number to plan against. Forecasts are re-issued daily; see the live screen for the current outlook.

Forecast daily mean discharge in cubic feet per second, by date
Date Low p10 Expected p50 High p90 Range
28.5 29.3 30.2
28 29 30
27.7 28.9 30.4
27.6 29 30.9
27.6 29.2 31.8
27.7 29.9 34.5
29 32.8 45.6
28.5 32.4 44.9
28.3 31.7 40.6
27.7 31 38.5
27.3 30.4 36.6
27.8 31.2 38.8
27.8 31.5 39.7
27.5 31.2 38.6

All values in cubic feet per second (cfs). Estimates only — do not use them for navigation or for any safety, rescue, or emergency decision.

Typical flow by month

Long-term daily discharge percentiles from the USGS record (up to 69 years of data), averaged within each month. These describe the historical normal range — they are not a forecast and not today's reading.

Historical monthly discharge percentiles in cubic feet per second
Month Low p10 Typical p50 High p90 Range
January 20.1 25.4 32.2
February 18.6 22.9 29.6
March 18.6 23.6 29.9
April 25.2 39.2 75.3
May 74.9 160.2 300.6
June 139.9 308.4 580.5
July 82.8 154.2 347.5
August 57.5 86.9 169.7
September 42.4 59.3 93.6
October 36.4 47.6 69.7
November 29.3 36 49.2
December 23.7 29.8 38

All values in cubic feet per second (cfs).

Common questions

When does Blue River near Dillon, CO normally run highest?
June, on the long-term record. The median daily flow that month is about 308.4 cfs, against 22.9 cfs in February, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
What is a normal flow for Blue River near Dillon, CO?
It depends on the month. In January, half of days historically fall near 25.4 cfs, with the middle 80% of days between 20.1 and 32.2 cfs. The month-by-month table on this page gives the full range.
How long has Blue River near Dillon, CO been measured?
Discharge records at USGS site 09046600 begin in 1957, about 69 years, covering roughly 9,200 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
Is there a flow forecast for Blue River near Dillon, CO?
Yes. Rivermatics trains a machine-learned model — a temporal-fusion transformer — on this basin's observed flows, weather, and snowpack, and issues a daily flow outlook reaching 14 days ahead: a median estimate inside a confidence band, not a single number to bet on. A companion model forecasts each day's water-temperature high and low. Every forecast is scored against days the model never trained on, and that track record is published on the live gauge screen. Open live conditions to see the current outlook.
Where is Blue River near Dillon, CO?
The gauge sits at 39.56665, -106.04946, in Colorado, in hydrologic subbasin 14010002, at an elevation of about 9,036 feet, draining roughly 123 square miles.
Can I use Blue River near Dillon, CO 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.

Upstream and downstream on the Blue River

Every gauge Rivermatics tracks on this river, ordered by drainage area — upstream first. See the Blue River in full.

Other gauges in this subbasin