Lake Tyler: 88.3% full as of 2026-09-14

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 2026-09-14 88.3 373.52 68,882 63,671 72,073 4,338
1 day prior 2026-09-13 88.5 373.55 69,012 63,801 72,073 4,343
2 days prior 2026-09-12 88.7 373.58 69,142 63,931 72,073 4,349
1 week prior 2026-09-07 89.5 373.71 69,709 64,498 72,073 4,372
1 month prior 2026-08-14 93.8 374.41 72,816 67,605 72,073 4,505
3 months prior 2026-06-14 97.3 374.96 75,324 70,113 72,073 4,618
6 months prior 2026-03-14 97.5 375.00 75,509 70,298 72,073 4,627
1 year prior 2025-09-14 95.9 374.74 74,313 69,102 72,073 4,572
*

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 2026-09-14 22:30 373.51 375.38 -1.87
1 hour prior 2026-09-14 21:30 373.49 375.38 -1.89
2 hours prior 2026-09-14 20:30 373.50 375.38 -1.88
6 hours prior 2026-09-14 16:30 373.48 375.38 -1.90
12 hours prior 2026-09-14 10:30 373.51 375.38 -1.87
24 hours prior 2026-09-13 22:30 373.53 375.38 -1.85
48 hours prior 2026-09-12 22:30 373.57 375.38 -1.81
*

Data is provisional and subject to revision.

Additional Information

Impoundment date 1967-01-01
Vertical datum NGVD29
Dead pool elevation 350.00 ft above NGVD29
Service spillway crest elevation 375.38 ft above NGVD29
Top of dam elevation 390.00 ft above NGVD29
Conservation pool elevation 375.38 ft above NGVD29
Data download (CSV) period of record, last one year, last 30 days

Elevation-Area-Capacity Curves

1967-01-01 (source: USGS)
1997-06-01 (source: TWDB) : GIS Data
2013-01-01 (source: TWDB) : GIS Data
Data Source USGS:08034000
USGS Monitoring Location USGS:08034000

Lake Location