Notes

2013-06-19: The July 2008 TWDB rating curve for this reservoir has been updated to include areas and volumes in the flood pool that were estimated from lidar data. The vertical datums of gauge, conservation pool and dead pool elevations have been adjusted to NAVD88+0.6ft.

Lake Travis: 45.2% full as of 2023-05-28

The elevation-storage rating curve used to produce the storage hydrograph is made of two segments: (1) the segment up to the conservation pool top (below the red line) is based on measured data, and (2) the segment in the flood pool (above the red line) is an extrapolation from the first segment and shouldn't be relied upon for flood storage information.

Historical Data

Date Percent Full Mean Water Level
(ft) 		Reservoir Storage
(acre-ft) 		Conservation Storage
(acre-ft) 		Conservation Capacity
(acre-ft) 		Surface Area
(acres)
Today 2023-05-28 45.2 639.35 513,525 496,493 1,098,044 10,528
Yesterday 2023-05-27 45.2 639.36 513,630 496,598 1,098,044 10,529
2 days ago 2023-05-26 45.2 639.36 513,630 496,598 1,098,044 10,529
1 week ago 2023-05-21 44.9 639.01 509,954 492,922 1,098,044 10,477
1 month ago 2023-04-28 44.0 638.05 499,966 482,934 1,098,044 10,332
3 months ago 2023-02-28 45.4 639.57 515,845 498,813 1,098,044 10,561
6 months ago 2022-11-28 46.3 640.45 525,197 508,165 1,098,044 10,695
1 year ago 2022-05-28 60.6 653.79 682,626 665,594 1,098,044 12,980
*

Percent Full is based on Conservation Storage and Conservation Capacity and doesn't account for storage in flood pool.

**

   Values above, including today's are averaged conditions. For near real-time instantaneous water level, see table below or the interactive map viewer.

Most Recent Instantaneous Water Level

Date/time Water Level
(ft) 		Conservation Pool Elevation
(ft) 		Height Above Conservation Pool
(ft)
Most recent 2023-05-28 10:45 639.36 681.00 -41.64 below flood pool
1 hour prior 2023-05-28 09:45 - n.a. - - n.a. - - n.a. - into flood pool
2 hours prior 2023-05-28 08:45 639.35 681.00 -41.65 below flood pool
6 hours prior 2023-05-28 04:45 639.34 681.00 -41.66 below flood pool
12 hours prior 2023-05-27 22:45 - n.a. - - n.a. - - n.a. - into flood pool
24 hours prior 2023-05-27 10:45 - n.a. - - n.a. - - n.a. - into flood pool
48 hours prior 2023-05-26 10:45 - n.a. - - n.a. - - n.a. - into flood pool
*

Data is provisional and subject to revision.

Additional Information

Impoundment date 1942-01-01
Gauge LCRA:3963
Vertical datum NAVD88 +0.6
Dead pool elevation 535.75 ft above NAVD88 +0.6
Emergency spillway crest elevation 714.00 ft above NAVD88 +0.6
Flood pool elevation 721.40 ft above NAVD88 +0.6
Maximum design elevation 745.00 ft above NAVD88 +0.6
Top of dam elevation 750.00 ft above NAVD88 +0.6
Conservation pool elevation 681.00 ft above NAVD88 +0.6
Data download (CSV) period of record, last one year, last 30 days

Elevation-Area-Capacity Curves

2008-07-01 (source: TWDB) : GIS Data
2019-11-01 (source: TWDB) : GIS Data

Lake Location