New Terrell City Lake: 94.4% full as of 2020-08-14

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)
Most recent 2020-08-14 94.4 503.44 8,115 8,104 8,583 826
1 day prior 2020-08-13 94.6 503.46 8,131 8,120 8,583 826
2 days prior 2020-08-12 94.7 503.47 8,140 8,129 8,583 827
1 week prior 2020-08-07 96.0 503.60 8,250 8,239 8,583 833
1 month prior 2020-07-14 99.6 503.96 8,560 8,549 8,583 847
3 months prior 2020-05-14 100.0 504.35 8,901 8,583 8,583 - n.a. -
6 months prior 2020-02-14 100.0 505.58 10,021 8,583 8,583 - n.a. -
1 year prior 2019-08-14 99.3 503.93 8,534 8,523 8,583 846
*

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 2020-08-15 02:30 503.40 504.00 -0.60 below flood pool
1 hour prior 2020-08-15 01:30 503.40 504.00 -0.60 below flood pool
2 hours prior 2020-08-15 00:30 503.41 504.00 -0.59 below flood pool
6 hours prior 2020-08-14 20:30 503.43 504.00 -0.57 below flood pool
12 hours prior 2020-08-14 14:30 503.46 504.00 -0.54 below flood pool
24 hours prior 2020-08-14 02:30 503.43 504.00 -0.57 below flood pool
48 hours prior 2020-08-13 02:30 503.46 504.00 -0.54 below flood pool
*

Data is provisional and subject to revision.

Additional Information

Impoundment date 1955-01-01
Vertical datum NGVD29
Gauge USGS:08062730
Dead pool elevation 481.00 ft above NGVD29
Service spillway crest elevation 508.80 ft above NGVD29
Emergency spillway crest elevation 509.80 ft above NGVD29
Top of dam elevation 514.20 ft above NGVD29
Conservation pool elevation
ending 1969-07-01
504.00 ft above NGVD29
Conservation pool elevation
starting 1969-07-01
504.00 ft above NGVD29
Data download (CSV) period of record, last one year, last 30 days

Elevation-Area-Capacity Curves

1997-05-01 (source: twdb) : GIS Data

Lake Location