Notes

2013-06-19: The vertical datums of gauge, conservation pool and dead pool elevations for this lake have been adjusted to NGVD29-0.04ft.

Lake Austin: 95.0% full as of 2022-12-09

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)
Most recent 2022-12-09 95.0 492.03 23,381 22,772 23,972 1,536
1 day prior 2022-12-08 94.9 492.01 23,351 22,742 23,972 1,535
2 days prior 2022-12-07 95.6 492.13 23,535 22,926 23,972 1,541
1 week prior 2022-12-02 96.0 492.19 23,628 23,019 23,972 1,545
1 month prior 2022-11-09 96.3 492.24 23,705 23,096 23,972 1,547
3 months prior 2022-09-09 95.4 492.09 23,474 22,865 23,972 1,539
6 months prior 2022-06-09 97.1 492.35 23,876 23,267 23,972 1,554
1 year prior 2021-12-09 94.8 492.00 23,335 22,726 23,972 1,534
*

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 2022-12-10 03:30 492.18 492.80 -0.62
1 hour prior 2022-12-10 02:30 492.09 492.80 -0.71
2 hours prior 2022-12-10 01:30 - n.a. - - n.a. - - n.a. -
6 hours prior 2022-12-09 21:30 - n.a. - - n.a. - - n.a. -
12 hours prior 2022-12-09 15:30 - n.a. - - n.a. - - n.a. -
24 hours prior 2022-12-09 03:30 492.12 492.80 -0.68
48 hours prior 2022-12-08 03:30 492.04 492.80 -0.76
*

Data is provisional and subject to revision.

Additional Information

Impoundment date 1939-01-01
Gauge LCRA:3999
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

Lake Location