Lake Nacogdoches: 98.5% full as of 2018-04-19

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 2018-04-19 98.5 278.72 38,915 38,913 39,522 2,158
1 day prior 2018-04-18 98.6 278.74 38,958 38,956 39,522 2,160
2 days prior 2018-04-17 98.7 278.77 39,023 39,021 39,522 2,163
1 week prior 2018-04-12 98.8 278.79 39,066 39,064 39,522 2,165
1 month prior 2018-03-19 97.9 278.61 38,678 38,676 39,522 2,147
3 months prior 2018-01-19 92.9 277.68 36,722 36,720 39,522 2,063
6 months prior 2017-10-19 92.9 277.67 36,701 36,699 39,522 2,062
1 year prior 2017-04-19 97.5 278.54 38,528 38,526 39,522 2,140
*

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 2018-04-20 04:45 278.68 279.0 -0.3 below flood pool
1 hour prior 2018-04-20 03:45 278.68 279.0 -0.3 below flood pool
2 hours prior 2018-04-20 02:45 278.68 279.0 -0.3 below flood pool
6 hours prior 2018-04-19 22:45 278.69 279.0 -0.3 below flood pool
12 hours prior 2018-04-19 16:45 278.70 279.0 -0.3 below flood pool
24 hours prior 2018-04-19 04:45 278.73 279.0 -0.3 below flood pool
48 hours prior 2018-04-18 04:45 278.75 279.0 -0.2 below flood pool
*

Data is provisional and subject to revision.

Additional Information

Impoundment date 1977-01-01
Vertical datum NGVD29
Gauge USGS:08036700
Dead pool elevation 235.9 ft above NGVD29
Service spillway crest elevation 279.0 ft above NGVD29
Emergency spillway crest elevation 286.1 ft above NGVD29
Maximum design elevation 298.5 ft above NGVD29
Top of dam elevation 303.0 ft above NGVD29
Conservation pool elevation 279.0 ft above NGVD29
Data download (CSV) period of record, last one year, last 30 days

Elevation-Area-Capacity Curves

1977-01-01 (source: usgs)
1994-03-01 (source: twdb) : GIS Data

Lake Location