Lake Arlington: 79.4% full as of 2026-10-28

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 2026-10-28 79.4 545.58 31,907 31,875 40,157 1,832
1 day prior 2026-10-27 79.5 545.61 31,962 31,930 40,157 1,832
2 days prior 2026-10-26 79.8 545.68 32,091 32,059 40,157 1,833
1 week prior 2026-10-21 81.4 546.02 32,715 32,683 40,157 1,839
1 month prior 2026-09-28 68.7 543.21 27,623 27,591 40,157 1,776
3 months prior 2026-07-28 85.6 546.94 34,415 34,383 40,157 1,856
6 months prior 2026-04-28 96.5 549.26 38,773 38,741 40,157 1,903
1 year prior 2025-10-28 91.6 548.22 36,805 36,773 40,157 1,880
*

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 2026-10-28 23:15 545.57 550.00 -4.43
1 hour prior 2026-10-28 22:15 545.58 550.00 -4.42
2 hours prior 2026-10-28 21:15 545.57 550.00 -4.43
6 hours prior 2026-10-28 17:15 545.58 550.00 -4.42
12 hours prior 2026-10-28 11:15 545.57 550.00 -4.43
24 hours prior 2026-10-27 23:15 545.60 550.00 -4.40
48 hours prior 2026-10-26 23:15 545.63 550.00 -4.37
*

Data is provisional and subject to revision.

Additional Information

Impoundment date 1957-01-01
Vertical datum NGVD29
Dead pool elevation 505.00 ft above NGVD29
Service spillway crest elevation 550.00 ft above NGVD29
Emergency spillway crest elevation 559.70 ft above NGVD29
Top of dam elevation 577.50 ft above NGVD29
Conservation pool elevation 550.00 ft above NGVD29
Data download (CSV) period of record, last one year, last 30 days

Elevation-Area-Capacity Curves

1957-01-01 (source: USGS)
2007-12-01 (source: TWDB) : GIS Data
Data Source USGS:08049200
USGS Monitoring Location USGS:08049200

Lake Location