Recent changes

2013-02-12: The rating curve for Addicks Reservoir has been updated and replaced with data from the Texas Water Development Board's Report 126.

Addicks Reservoir: 0.1% full as of 2017-08-20

Addicks Reservoir is a flood control lake. It is not used for water supply and under normal conditions it is empty. The elevation-storage rating curve used to produce the storage hydrograph is made of two segments: (1) the segment up to the conservation pool top (below the red line) is based on measured data, while the segment in the flood pool (above the red line) is an extrapolation from the first segment and shouldn't be relied upon for flood storage information.

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 2017-08-20 0.1 85.93 267 267 202,128 169
Yesterday 2017-08-19 0.2 87.23 409 409 202,128 300
2 days ago 2017-08-18 0.3 88.33 674 674 202,128 474
1 week ago 2017-08-13 2.0 91.75 4,099 4,099 202,128 1,497
1 month ago 2017-07-20 0.1 80.94 218 218 202,128 67
3 months ago 2017-05-20 0.0 70.45 49 49 202,128 - n.a. -
6 months ago 2017-02-20 0.1 74.81 283 283 202,128 - n.a. -
1 year ago 2016-08-20 2.3 92.12 4,707 4,707 202,128 1,649
*

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 2017-08-20 21:15 84.82 114.0 -29.2 below flood pool
1 hour prior 2017-08-20 20:15 84.93 114.0 -29.1 below flood pool
2 hours prior 2017-08-20 19:15 85.03 114.0 -29.0 below flood pool
6 hours prior 2017-08-20 15:15 85.42 114.0 -28.6 below flood pool
12 hours prior 2017-08-20 09:15 85.91 114.0 -28.1 below flood pool
24 hours prior 2017-08-19 21:15 86.71 114.0 -27.3 below flood pool
48 hours prior 2017-08-18 21:15 87.95 114.0 -26.1 below flood pool
*

Data is provisional and subject to revision.

Additional Information

Impoundment date 1948-01-01
Vertical datum NAVD88
Gauge USGS:08073000
Dead pool elevation 73.0 ft above NGVD29
Conservation pool elevation 114.0 ft above NGVD29
Top of flood gate elevation 113 ft above NGVD29
Emergency spillway crest elevation 114 ft above NGVD29
Top of dam elevation 123.5 ft above NGVD29
Data download (CSV) period of record, last one year, last 30 days

Elevation-Area-Capacity Curves

1974-10-01 (source: twdb)

Lake Location