Lake Nacogdoches: 89.7% full as of 2021-01-16

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 2021-01-16 89.7 277.06 35,459 35,457 39,522 2,010
1 day prior 2021-01-15 89.7 277.05 35,438 35,436 39,522 2,010
2 days prior 2021-01-14 89.6 277.04 35,418 35,416 39,522 2,009
1 week prior 2021-01-09 88.9 276.89 35,118 35,116 39,522 1,996
1 month prior 2020-12-16 85.7 276.25 33,856 33,854 39,522 1,948
3 months prior 2020-10-16 88.2 276.76 34,859 34,857 39,522 1,986
6 months prior 2020-07-16 95.7 278.21 37,827 37,825 39,522 2,109
1 year prior 2020-01-16 90.8 277.28 35,903 35,901 39,522 2,030
*

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 2021-01-17 02:45 277.06 279.00 -1.94 below flood pool
1 hour prior 2021-01-17 01:45 277.06 279.00 -1.94 below flood pool
2 hours prior 2021-01-17 00:45 277.06 279.00 -1.94 below flood pool
6 hours prior 2021-01-16 20:45 277.06 279.00 -1.94 below flood pool
12 hours prior 2021-01-16 14:45 277.06 279.00 -1.94 below flood pool
24 hours prior 2021-01-16 02:45 277.06 279.00 -1.94 below flood pool
48 hours prior 2021-01-15 02:45 277.05 279.00 -1.95 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 235.90 ft above NGVD29
Service spillway crest elevation 279.00 ft above NGVD29
Emergency spillway crest elevation 286.10 ft above NGVD29
Maximum design elevation 298.50 ft above NGVD29
Top of dam elevation 303.00 ft above NGVD29
Conservation pool elevation 279.00 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