For near-real time water levels of this reservoir and others in flood stage, Visit Flood Viewer



Addicks Reservoir is a flood control lake. It is not used for water supply and under normal conditions it is empty.

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 2025-09-08 - n.a. - 80.88 - n.a. - - n.a. - - n.a. - - n.a. -
1 day prior 2025-09-07 - n.a. - 76.62 - n.a. - - n.a. - - n.a. - - n.a. -
2 days prior 2025-09-06 - n.a. - 76.35 - n.a. - - n.a. - - n.a. - - n.a. -
1 week prior 2025-09-01 - n.a. - 78.55 - n.a. - - n.a. - - n.a. - - n.a. -
1 month prior 2025-08-08 - n.a. - 76.38 - n.a. - - n.a. - - n.a. - - n.a. -
3 months prior 2025-06-08 - n.a. - 68.59 - n.a. - - n.a. - - n.a. - - n.a. -
6 months prior 2025-03-08 - n.a. - 67.90 - n.a. - - n.a. - - n.a. - - n.a. -
1 year prior 2024-09-08 - n.a. - 75.64 - n.a. - - n.a. - - n.a. - - n.a. -
*

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) 		Flood Pool Lower Bound
(ft) 		Height Into Flood Pool
(ft)
Most recent 2025-09-08 23:15 80.84 67.50 13.34 into flood pool
1 hour prior 2025-09-08 22:15 80.93 67.50 13.43 into flood pool
2 hours prior 2025-09-08 21:15 81.01 67.50 13.51 into flood pool
6 hours prior 2025-09-08 17:15 81.25 67.50 13.75 into flood pool
12 hours prior 2025-09-08 11:15 81.61 67.50 14.11 into flood pool
24 hours prior 2025-09-07 23:15 78.56 67.50 11.06 into flood pool
48 hours prior 2025-09-06 23:15 76.35 67.50 8.85 into flood pool
*

Data is provisional and subject to revision.

Additional Information

Impoundment date 1948-01-01
Vertical datum NAVD88
Dead pool elevation 67.50 ft above NAVD88
Emergency spillway crest elevation 108.00 ft above NGVD29
Top of dam elevation 108.00 ft above NGVD29
Data download (CSV) period of record, last one year, last 30 days

Elevation-Area-Capacity Curves

1974-10-01 (source: TWDB)
2008-10-01 (source: USACE)
Data Source USGS:08073000

Lake Location