Lavon Lake: 81.7% full as of 2026-09-17

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 2026-09-17 81.7 488.23 337,719 334,878 409,757 19,036
Yesterday 2026-09-16 81.8 488.25 338,100 335,259 409,757 19,046
2 days ago 2026-09-15 82.1 488.30 339,053 336,212 409,757 19,072
1 week ago 2026-09-10 83.3 488.56 344,029 341,188 409,757 19,199
1 month ago 2026-08-17 90.3 490.03 372,718 369,877 409,757 19,815
3 months ago 2026-06-17 100.0 493.71 448,666 409,757 409,757 21,538
6 months ago 2026-03-17 99.6 491.93 411,155 408,314 409,757 20,588
1 year ago 2025-09-17 90.2 490.01 372,322 369,481 409,757 19,807
*

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 2026-09-17 03:00 488.23 492.00 -3.77 below flood pool
1 hour prior 2026-09-17 02:00 488.23 492.00 -3.77 below flood pool
2 hours prior 2026-09-17 01:00 488.23 492.00 -3.77 below flood pool
6 hours prior 2026-09-16 21:00 488.24 492.00 -3.76 below flood pool
12 hours prior 2026-09-16 15:00 488.24 492.00 -3.76 below flood pool
24 hours prior 2026-09-16 03:00 488.27 492.00 -3.73 below flood pool
48 hours prior 2026-09-15 03:00 488.32 492.00 -3.68 below flood pool
*

Data is provisional and subject to revision.

Additional Information

Impoundment date 1953-01-01
Vertical datum NGVD29
Dead pool elevation 453.00 ft above NGVD29
Service spillway crest elevation 475.50 ft above NGVD29
Top of flood gate elevation 503.50 ft above NGVD29
Emergency spillway crest elevation 503.50 ft above NGVD29
Flood pool elevation 503.50 ft above NGVD29
Maximum design elevation 509.00 ft above NGVD29
Top of dam elevation 514.00 ft above NGVD29
Conservation pool elevation
Start date: 1975-12-01 		492.00 ft above NGVD29
Conservation pool elevation
End date: 1975-12-01 		472.00 ft above NGVD29
Data download (CSV) period of record, last one year, last 30 days

Elevation-Area-Capacity Curves

2011-07-01 (source: TWDB) : GIS Data
2021-07-01 (source: TWDB) : GIS Data
Data Source USGS:08060500
USGS Monitoring Location USGS:08060500

Lake Location