UBC Dam 21 near Hutto water level

Name: UBC Dam 21 near Hutto water level (U.S. Geological Survey)
Creator: U.S. Geological Survey
License: https://www.usgs.gov/information-policies-and-instructions/copyrights-and-credits

Reservoir, UBC Dam 21, Texas, United States

Directions

Low for mid-October

Surface elevation

616.13ft Down 0.05 ft over the last 24 hours

Measured Oct 18, 2026, 04:00 PM CDT (55 min ago)

History

What this means

UBC Dam 21 near Hutto is below normal for mid-October, with the lake level at 616.13 ft.

That puts it 1.55 ft below the median of 617.68 ft for mid-October, based on 7 years of readings. A year ago it stood at 616.09 ft (+0.04 ft).

It has dropped 0.05 ft over the past 24 hours. With the water still dropping, the shoreline keeps moving out. In the last month it has stayed between 616.13 ft and 616.96 ft.

Many reservoirs are drawn down through summer and fall; most of the refill comes later, with winter rain or spring snowmelt.

Compared with 7 years of daily readings for this time of year. How to read levels

Key numbers

Median for this date: 617.68 ft1.55 ft below the median for this date
Normal for this date: 616.09 ft – 618.17 ft8 years in 10 fall in this range (7 years of records)
Same day last year: 616.09 ft+0.04 ft
Lowest and highest in 30 days: 616.13 ft – 616.96 ft
Lowest and highest in 12 months: 616.07 ft – 619.82 ft

On the water at UBC Dam 21 near Hutto

A receding shoreline opens up beaches but also uncovers hazards: stumps, rocks and soft mud that are usually well under water.

Wear a life jacket on the water. Most boating deaths involve people who were not wearing one.

Weather at the gauge

No rain in the last 3 days.

18 Sun 71° 48° – Wind 7 mph

19 Mon 76° 51° – Wind 8 mph

20 Tue 82° 57° – Wind 9 mph

21 Wed 84° 62° – Wind 7 mph

22 Thu 86° 64° – Wind 10 mph

23 Fri 85° 62° – Wind 12 mph

24 Sat 85° 61° – Wind 13 mph

Forecast: Open-Meteo

Sunrise 07:35 AM Sunset 06:57 PM Daylight 11 hr, 22 min First quarter 53%

Map

Nearby gauges

Gauge	Level	Compared with normal	24 hours	Distance
UBC Dam 20 near HuttoReservoir, UBC Dam 20	646.77 ft	Very low	±0	1.2 mi
UBC Dam 22 near PflugervilleReservoir, UBC Dam 22	597.75 ft	Normal	−0.01 ft	1.3 mi
UBC Dam 19 near HuttoReservoir, UBC Dam 19	659.44 ft	Low	−0.01 ft	2.9 mi
UBC Dam 18 near HuttoReservoir, UBC Dam 18	657.18 ft	Very low	−0.03 ft	3.1 mi
UBC Dam 17 near Round RockReservoir, UBC Dam 17	671.33 ft	Very high	+0.01 ft	4.8 mi
Brushy Creek at Kenney Fort Blvd at Round RockRiver gauge, Brushy Creek	3.32 ft	Normal	±0	5.0 mi
UBC Dam 15 near Round RockReservoir, UBC Dam 15	697.28 ft	Very low	−0.01 ft	5.2 mi
Brushy Creek at FM 973 near CouplandRiver gauge, Brushy Creek	5.24 ft	Normal	+0.02 ft	5.9 mi

Questions and answers

How does UBC Dam 21 near Hutto compare with last year?

It is 0.04 ft higher than on the same day last year, when the reading was 616.09 ft.

What is a normal level for UBC Dam 21 near Hutto in mid-October?

The median for mid-October is 617.68 ft. In 8 years out of 10 the reading falls between 616.09 ft and 618.17 ft, based on 7 years of records.

Is UBC Dam 21 near Hutto really 616.13 ft deep?

No. 616.13 ft is the height of the water surface above sea level (or the agency's vertical datum), not the depth of the water.

What is the water level of UBC Dam 21 near Hutto today?

On Oct 18, 2026, 04:00 PM CDT, the surface elevation was 616.13 ft. Down 0.05 ft over the last 24 hours.

Is UBC Dam 21 near Hutto rising or falling?

Down 0.05 ft over the last 24 hours. Down 0.27 ft over the last 7 days.

Is the level of UBC Dam 21 near Hutto normal?

Low for mid-October. Compared with 7 years of daily readings for this time of year.

How often is this data updated?

The U.S. Geological Survey publishes a new reading every 15 minutes. This page refreshes within minutes of each update.

For specialists

Station codes, datum, parameters, data quality and downloads

Operator: U.S. Geological Survey
Station code: usgs:303022097331200 (Agency page)
Coordinates: 30.50620, -97.55321 (WGS84)
Vertical datum: NAVD88
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
Surface elevation	616.13 ft	2026-10-18 21:00	Provisional

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How to cite

U.S. Geological Survey: UBC Dam 21 near Hutto (usgs:303022097331200). Accessed October 18, 2026 via Nivelmap, https://nivelmap.com/en/united-states/texas/ubc-dam-21-near-hutto

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