Lake Austin: 95.6% full as of 2024-04-23

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 2024-04-23 95.6 492.13 23,535 22,926 23,972 1,541
Yesterday 2024-04-22 95.8 492.15 23,566 22,957 23,972 1,542
2 days ago 2024-04-21 95.3 492.08 23,458 22,849 23,972 1,539
1 week ago 2024-04-16 95.2 492.06 23,427 22,818 23,972 1,538
1 month ago 2024-03-23 95.1 492.04 23,397 22,788 23,972 1,536
3 months ago 2024-01-23 97.6 492.44 24,016 23,407 23,972 1,559
6 months ago 2023-10-23 96.0 492.18 23,612 23,003 23,972 1,544
1 year ago 2023-04-23 95.7 492.14 23,551 22,942 23,972 1,542
*

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 2024-04-23 13:30 492.07 492.80 -0.73
1 hour prior 2024-04-23 12:30 - n.a. - - n.a. - - n.a. -
2 hours prior 2024-04-23 11:30 492.05 492.80 -0.75
6 hours prior 2024-04-23 07:30 492.12 492.80 -0.68
12 hours prior 2024-04-23 01:30 492.13 492.80 -0.67
24 hours prior 2024-04-22 13:30 - n.a. - - n.a. - - n.a. -
48 hours prior 2024-04-21 13:30 492.01 492.80 -0.79
*

Data is provisional and subject to revision.

Additional Information

Impoundment date 1939-01-01
Vertical datum NGVD29 -0.04
Dead pool elevation 462.00 ft above NGVD29 -0.04
Service spillway crest elevation 480.00 ft above NGVD29
Top of flood gate elevation 482.00 ft above NGVD29
Top of flood gate elevation 498.00 ft above NGVD29
Emergency spillway crest elevation 492.80 ft above NGVD29
Maximum design elevation 512.00 ft above NGVD29
Top of dam elevation 519.00 ft above NGVD29
Conservation pool elevation 492.80 ft above NGVD29 -0.04
Data download (CSV) period of record, last one year, last 30 days

Elevation-Area-Capacity Curves

2008-12-01 (source: TWDB) : GIS Data
Data Source LCRA:3999

Lake Location