Lake L. B. Johnson
Source: Texas Water Development Board (Water Data for Texas)
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Level history
Field notes
Lake L. B. Johnson's latest daily level (Oct 25, 2026) is 824.86 ft, which is 99.2% of its conservation capacity.
That is 0.14 ft below the conservation (full) pool elevation of 825.00 ft.
Over the past 7 days the lake has been rising (+0.21 ft), and it is +0.01 ft over 30 days.
Compared with a year ago (824.67 ft), the lake is 0.19 ft higher.
For this time of year, the median in TWDB's records (1996–2025, 30 years with data) is 98.4% full, so Lyndon B Johnson is currently close to normal.
In TWDB's dataset (since 1951), the highest level recorded is 828.00 ft (Sep 11, 1952) and the lowest is 793.80 ft (Nov 16, 1970). Older records may be monthly rather than daily.
Lake facts
| Conservation storage | 111,878 ac-ft |
|---|---|
| Total storage (latest) | 130,718 ac-ft |
| Surface area | 6,418 acres |
| Gauge location | 30.5560, -98.3384 |
| Groups | Colorado River Basin Lower Colorado (Region K) Water Planning Area |
Reference levels
| Level · source | Elevation | Today vs level |
|---|---|---|
| Conservation (full) pool TWDB | 825.00 ft | −0.14 ft |
| Dead pool TWDB | 793.40 ft | +31.46 ft |
| Highest in TWDB data (since 1951) TWDB series | 828.00 ft Sep 11, 1952 | −3.14 ft |
| Lowest in TWDB data (since 1951) TWDB series | 793.80 ft Nov 16, 1970 | +31.06 ft |
| Normal range for this date TWDB series, 30 years 1996–2025 | 98.0–99.1% full (median 98.4%) | — |
| Conservation capacity TWDB | 112,778 acre-feet | — |
Only levels the agency publishes, or that we compute directly from its own records, are listed. “Today vs level” = latest reading minus the reference level. A level the source does not publish is left out rather than estimated.
Nearby lakes
Common questions
How full is Lake L. B. Johnson right now?
As of Oct 25, 2026, TWDB reports Lake L. B. Johnson at 99.2% of its conservation capacity (111,878 of 112,778 acre-feet). For this date, the middle half of past years (1996–2025) ranged from 98.0% to 99.1% full, with a median of 98.4%.
What is the record high and low at Lake L. B. Johnson?
In TWDB's records since 1951, the highest level is 828.00 ft (Sep 11, 1952) and the lowest is 793.80 ft (Nov 16, 1970).
What is full pool at Lake L. B. Johnson?
The conservation (full) pool elevation used by TWDB is 825.00 ft. The lake is currently 0.14 ft below it.
Is Lake L. B. Johnson rising or falling?
Over the last 7 days it changed +0.21 ft and over 30 days +0.01 ft.
How often is this page updated?
The page is rebuilt automatically every day from TWDB's published data. Values can be revised later by the source agency.
Where does the data come from?
Water Data for Texas, run by the Texas Water Development Board, which compiles gauge readings from USGS, USACE, river authorities and others. Forecasts come from the National Weather Service.
Values are TWDB daily estimates; elevations in feet above the vertical datum stated by TWDB. TWDB disclaimer: reservoir data are best estimates generated by the Texas Water Development Board from data collected by various providers; TWDB makes no warranties as to their fitness for any purpose. See data sources.