Blue River below Green Mountain Reservoir water level

Name: Blue River below Green Mountain Reservoir water level (U.S. Geological Survey)
Creator: U.S. Geological Survey
License: https://www.usgs.gov/information-policies-and-instructions/copyrights-and-credits

River gauge, Blue River, Colorado, United States

Directions

Below flood stage

Water level

3.34ft Down 0.07 ft over the last 24 hours

Measured Oct 20, 2026, 10:00 AM MDT (51 min ago)

Flow: 168 cfs

History

7 days

Water level Forecast Minor flood stage

The forecast expects the river to rise to 3.44 ft by Tuesday, October 20 at 05:00 AM. Issued Monday, October 19 at 08:28 AM by NOAA National Weather Service.

What this means

The Blue River below Green Mountain Reservoir is at 3.34 ft, in the normal range.

It is 7.16 ft below the flood stage of 10.50 ft.

It has dropped 0.07 ft over the past 24 hours. The forecast expects the river to rise to 3.44 ft by Tuesday, October 20 at 05:00 AM. In the last month it has stayed between 3.32 ft and 3.47 ft.

Judged against the official flood stage for this gauge. How to read levels

Key numbers

Highest on record: 10.85 ftJuly 12, 1995
Forecast peak: 3.44 ftTuesday, October 20 at 05:00 AM

Floating and fishing near Blue River below Green Mountain Reservoir

Normal flows mean predictable rapids and good access at most put-ins.

Flood stage here is 10.50 ft, 7.16 ft above the current reading. Beyond it, the National Weather Service also defines moderate and major flood stages.

What happens at each level

12.00 ft: This is a major, life-threatening flood especially in the steep canyon immediately downstream of Green Mountain Reservoir. There is widespread inundation of low lying properties along the Blue River with extensive flooding of roads and bridges along and crossing the river.
11.00 ft: Moderate flooding will be especially dangerous in the steep canyon immediately downstream of Green Mountain Reservoir. Buildings near the river flood. Debris damming on the upriver side of bridges may result in flooding of bridge approaches.
10.50 ft: Ranchlands flood and structures begin to flood along the Blue River below Green Mountain Reservoir.
10.00 ft: Low lying areas flood along the Blue River below Green Mountain Reservoir.
9.20 ft: Without mitigation, water begins to impact low lying areas along the river.
3.34 ft: Right now

Impact statements from the U.S. National Weather Service.

Highest crests on record

Rank	Level	Date
1	10.85 ft	July 12, 1995
2	10.22 ft	July 1, 1984
3	10.13 ft	July 8, 1957
4	10.12 ft	July 11, 2011
5	9.88 ft	June 24, 1997
6	9.53 ft	June 28, 2009
7	9.52 ft	July 11, 1983
8	9.15 ft	June 18, 2007
9	8.98 ft	July 4, 2019
10	8.89 ft	June 21, 2015

Weather at the gauge

No rain in the last 3 days.

20 Tue 58° 34° – Wind 8 mph

21 Wed 62° 40° – Wind 11 mph

22 Thu 52° 43° 0.21 in, 58% Wind 6 mph

23 Fri 59° 37° 0.15 in, 50% Wind 15 mph

24 Sat 58° 33° – Wind 6 mph

25 Sun 52° 35° 0.20 in, 41% Wind 6 mph

26 Mon 50° 32° – Wind 10 mph

Forecast: Open-Meteo

Sunrise 07:22 AM Sunset 06:20 PM Daylight 10 hr, 58 min Waxing gibbous 70%

Map

Other gauges on the Blue River

Gauge	Level	Compared with normal	24 hours	Distance
Blue River at Blue RiverRiver gauge, Blue River	0.63 ft	Below flood stage	±0	33 mi
Blue River near DillonRiver gauge, Blue River	4.45 ft	Below flood stage	±0	26 mi
Blue River below DillonRiver gauge, Blue River	0.92 ft	Below flood stage	±0	23 mi

Nearby gauges

Gauge	Level	Compared with normal	24 hours	Distance
Green Mountain ReservoirReservoir	7,826.72 ft	Very low		1.1 mi
Williams Fork near ParshallRiver gauge, Williams Fork	4.7 cfs	Very low	−1.3 cfs	12 mi
Colorado River near KremmlingRiver gauge, Colorado River	3.85 ft	Below flood stage	−0.07 ft	12 mi
Williams Fork below Williams Fork ReservoirRiver gauge, Williams Fork	1.33 ft	Below flood stage	±0	13 mi
Piney River near State BridgeRiver gauge, Piney River	2.59 ft	Below flood stage	±0	14 mi
Williams Fork near LealRiver gauge, Williams Fork	1.43 ft	Below flood stage	±0	15 mi
Booth Creek near MinturnRiver gauge, Booth Creek	0.9 cfs	Very low	±0	16 mi
Muddy Creek below Wolford Mountain Reser. near KremmlingRiver gauge, Muddy Creek	4.05 ft	Below flood stage	±0	16 mi

Questions and answers

What is flood stage for the Blue River below Green Mountain Reservoir?

The official flood stage is 10.50 ft. The level is currently 7.16 ft below it.

Is gage height the same as water depth?

No. Gage height is measured from a fixed reference point chosen by the agency, so a reading of 10 ft does not mean the river is 10 ft deep.

What is the water level of Blue River below Green Mountain Reservoir today?

On Oct 20, 2026, 10:00 AM MDT, the water level was 3.34 ft. Down 0.07 ft over the last 24 hours.

Is Blue River below Green Mountain Reservoir rising or falling?

Down 0.07 ft over the last 24 hours.

Is the level of Blue River below Green Mountain Reservoir normal?

Below flood stage. Judged against the official flood stage for this gauge.

What is the highest water level ever recorded at Blue River below Green Mountain Reservoir?

The highest level on record is 10.85 ft on July 12, 1995.

Is Blue River below Green Mountain Reservoir expected to rise?

The forecast expects the river to rise to 3.44 ft by Tuesday, October 20 at 05:00 AM.

For specialists

Station codes, datum, parameters, data quality and downloads

Operator: U.S. Geological Survey
Station code: usgs:09057500 (Agency page)
Coordinates: 39.88026, -106.33392 (WGS84)
Vertical datum: NGVD29
Update interval: every 15 minutes
Licence: Public domain. Data: U.S. Geological Survey (USGS), provisional data subject to revision

Published series

Parameter	Last value	Time (UTC)	Quality
Water level	3.34 ft	2026-10-20 16:00	Provisional
Flow	168 cfs	2026-10-20 16:00	Provisional

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How to cite

U.S. Geological Survey: Blue River below Green Mountain Reservoir (usgs:09057500). Accessed October 20, 2026 via Nivelmap, https://nivelmap.com/en/united-states/colorado/blue-river-below-green-mountain-reservoir

How we check values

Each reading is stored as published. We hold back values that jump faster than physically plausible and show the measurement time with every value.

Readings are provisional, can be delayed or wrong and are not a flood warning. Read the disclaimer