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 is 95.0% full as of 2016-09-26

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, while 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.

Date Percent Full Mean Water Level
(ft)
Reservoir Storage
(acre-ft)
Conservation Storage
(acre-ft)
Conservation Capacity
(acre-ft)
Surface Area
(acres)
Most recent 2016-09-26 95.0 492.03 23,381 22,772 23,972 1,536
1 day prior 2016-09-25 94.7 491.98 23,305 22,696 23,972 1,533
2 days prior 2016-09-24 94.7 491.99 23,320 22,711 23,972 1,534
1 week prior 2016-09-19 94.8 492.00 23,335 22,726 23,972 1,534
1 month prior 2016-08-26 95.3 492.08 23,458 22,849 23,972 1,539
3 months prior 2016-06-26 96.2 492.21 23,659 23,050 23,972 1,546
6 months prior 2016-03-26 95.1 492.05 23,412 22,803 23,972 1,537
1 year prior 2015-09-26 95.9 492.17 23,597 22,988 23,972 1,544
*

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 2016-09-27 05:00 491.97 492.8 -0.8 below flood pool
1 hour prior 2016-09-27 04:00 492.02 492.8 -0.8 below flood pool
2 hours prior 2016-09-27 03:00 492.03 492.8 -0.8 below flood pool
6 hours prior 2016-09-26 23:00 492.00 492.8 -0.8 below flood pool
12 hours prior 2016-09-26 17:00 492.08 492.8 -0.7 below flood pool
24 hours prior 2016-09-26 05:00 491.96 492.8 -0.8 below flood pool
48 hours prior 2016-09-25 05:00 492.08 492.8 -0.7 below 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 ft above NGVD29
Conservation pool elevation 492.8 ft above NGVD29 -0.04
Top of flood gate elevation 482 ft above NGVD29
Top of flood gate elevation 498 ft above NGVD29
Emergency spillway crest elevation 492.8 ft above NGVD29
Maximum design elevation 512 ft above NGVD29
Top of dam elevation 519 ft above NGVD29
Data download (CSV) period of record, last one year, last 30 days

Elevation-Area-Capacity Curves

2008-12-01 (source: twdb) : GIS Data