Recent changes
2017-9-14: The rating curve for Addicks Reservoir has been updated and replaced with data from the U.S. Army Corps of Engineers Galveston District.
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 | 2020-10-21 | - n.a. - | 69.39 | - n.a. - | - n.a. - | - n.a. - | - n.a. - |
| 1 day prior | 2020-10-20 | - n.a. - | 73.01 | - n.a. - | - n.a. - | - n.a. - | - n.a. - |
| 2 days prior | 2020-10-19 | - n.a. - | 73.55 | - n.a. - | - n.a. - | - n.a. - | - n.a. - |
| 1 week prior | 2020-10-14 | - n.a. - | 69.61 | - n.a. - | - n.a. - | - n.a. - | - n.a. - |
| 1 month prior | 2020-09-21 | - n.a. - | 74.98 | - n.a. - | - n.a. - | - n.a. - | - n.a. - |
| 3 months prior | 2020-07-21 | - n.a. - | 68.45 | - n.a. - | - n.a. - | - n.a. - | - n.a. - |
| 6 months prior | 2020-04-21 | - n.a. - | 71.19 | - n.a. - | - n.a. - | - n.a. - | - n.a. - |
| 1 year prior | 2019-10-21 | - n.a. - | 72.05 | - 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 | 2020-10-21 23:30 | 69.13 | 67.50 | 1.63 |
| 1 hour prior | 2020-10-21 22:30 | 69.04 | 67.50 | 1.54 |
| 2 hours prior | 2020-10-21 21:30 | 69.11 | 67.50 | 1.61 |
| 6 hours prior | 2020-10-21 17:30 | 69.07 | 67.50 | 1.57 |
| 12 hours prior | 2020-10-21 11:30 | 69.46 | 67.50 | 1.96 |
| 24 hours prior | 2020-10-20 23:30 | 69.83 | 67.50 | 2.33 |
| 48 hours prior | 2020-10-19 23:30 | 74.67 | 67.50 | 7.17 |
*
Data is provisional and subject to revision.
Additional Information
| Impoundment date | 1948-01-01 |
| Vertical datum | NAVD88 |
| Gauge | USGS:08073000 |
| Dead pool elevation | 67.50 ft above NAVD88 |
| Emergency spillway crest elevation | 108.00 ft above NGVD29 |
| Top of dam elevation | 121.00 ft above NGVD29 |
| Data download (CSV) | period of record, last one year, last 30 days |
Lake Location
