Lake Tyler: 86.4% full as of 2018-09-21

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, and (2) 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 2018-09-21 86.4 373.20 67,503 62,292 72,073 4,282
Yesterday 2018-09-20 86.5 373.21 67,546 62,335 72,073 4,284
2 days ago 2018-09-19 86.5 373.21 67,546 62,335 72,073 4,284
1 week ago 2018-09-14 86.4 373.19 67,460 62,249 72,073 4,281
1 month ago 2018-08-21 88.2 373.50 68,795 63,584 72,073 4,334
3 months ago 2018-06-21 96.7 374.87 74,909 69,698 72,073 4,599
6 months ago 2018-03-21 100.0 375.56 78,136 72,073 72,073 4,759
1 year ago 2017-09-21 97.3 374.96 75,324 70,113 72,073 4,618
*

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 2018-09-21 23:30 373.23 375.4 -2.1 below flood pool
1 hour prior 2018-09-21 22:30 373.23 375.4 -2.1 below flood pool
2 hours prior 2018-09-21 21:30 373.23 375.4 -2.1 below flood pool
6 hours prior 2018-09-21 17:30 373.21 375.4 -2.2 below flood pool
12 hours prior 2018-09-21 11:30 373.20 375.4 -2.2 below flood pool
24 hours prior 2018-09-20 23:30 373.20 375.4 -2.2 below flood pool
48 hours prior 2018-09-19 23:30 373.23 375.4 -2.1 below flood pool
*

Data is provisional and subject to revision.

Additional Information

Impoundment date 1967-01-01
Vertical datum NGVD29
Gauge USGS:08034000
Dead pool elevation 350.0 ft above NGVD29
Service spillway crest elevation 375.4 ft above NGVD29
Top of dam elevation 390.0 ft above NGVD29
Conservation pool elevation 375.4 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

Lake Location