Recent changes

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: 95.3% full as of 2017-09-23

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 2017-09-23 95.3 492.07 23,443 22,834 23,972 1,538
Yesterday 2017-09-22 95.5 492.11 23,504 22,895 23,972 1,540
2 days ago 2017-09-21 95.2 492.06 23,427 22,818 23,972 1,538
1 week ago 2017-09-16 95.1 492.04 23,397 22,788 23,972 1,536
1 month ago 2017-08-23 95.1 492.05 23,412 22,803 23,972 1,537
3 months ago 2017-06-23 95.1 492.05 23,412 22,803 23,972 1,537
6 months ago 2017-03-23 94.9 492.02 23,366 22,757 23,972 1,535
1 year ago 2016-09-23 95.2 492.06 23,427 22,818 23,972 1,538
*

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 2017-09-23 07:30 491.96 492.8 -0.8 below flood pool
1 hour prior 2017-09-23 06:30 - n.a. - - n.a. - - n.a. - into flood pool
2 hours prior 2017-09-23 05:30 492.06 492.8 -0.7 below flood pool
6 hours prior 2017-09-23 01:30 492.18 492.8 -0.6 below flood pool
12 hours prior 2017-09-22 19:30 - n.a. - - n.a. - - n.a. - into flood pool
24 hours prior 2017-09-22 07:30 491.94 492.8 -0.9 below flood pool
48 hours prior 2017-09-21 07:30 - n.a. - - n.a. - - n.a. - into flood pool
*

Data is provisional and subject to revision.

Additional Information

Impoundment date 1939-01-01
Vertical datum NGVD29 -0.04
Gauge LCRA:3999
Dead pool elevation 462.0 ft above NGVD29 -0.04
Service spillway crest elevation 480.0 ft above NGVD29
Top of flood gate elevation 482.0 ft above NGVD29
Top of flood gate elevation 498.0 ft above NGVD29
Emergency spillway crest elevation 492.8 ft above NGVD29
Maximum design elevation 512.0 ft above NGVD29
Top of dam elevation 519.0 ft above NGVD29
Conservation pool elevation 492.8 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