Bridgeport Reservoir: 82.7% full as of 2026-08-11

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 2026-08-11 82.7 830.48 307,869 307,869 372,183 11,060
Yesterday 2026-08-10 82.9 830.53 308,423 308,423 372,183 11,070
2 days ago 2026-08-09 83.0 830.57 308,866 308,866 372,183 11,079
1 week ago 2026-08-04 83.4 830.72 310,530 310,530 372,183 11,110
1 month ago 2026-07-11 86.5 831.73 321,857 321,857 372,183 11,318
3 months ago 2026-05-11 86.5 831.75 322,084 322,084 372,183 11,322
6 months ago 2026-02-11 84.9 831.20 315,887 315,887 372,183 11,211
1 year ago 2025-08-11 95.5 834.63 355,548 355,548 372,183 11,948
*

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 2026-08-11 17:00 830.45 836.00 -5.55 below flood pool
1 hour prior 2026-08-11 16:00 830.47 836.00 -5.53 below flood pool
2 hours prior 2026-08-11 15:00 830.46 836.00 -5.54 below flood pool
6 hours prior 2026-08-11 11:00 830.46 836.00 -5.54 below flood pool
12 hours prior 2026-08-11 05:00 830.48 836.00 -5.52 below flood pool
24 hours prior 2026-08-10 17:00 830.53 836.00 -5.47 below flood pool
48 hours prior 2026-08-09 17:00 830.58 836.00 -5.42 below flood pool
*

Data is provisional and subject to revision.

Additional Information

Impoundment date 1931-01-01
Vertical datum
Start date: 2016-11-10 		NAVD88
Vertical datum
End date: 2016-11-09 		NGVD29
Dead pool elevation
Start date: 1971-02-01 		752.00 ft above NAVD88
Dead pool elevation
End date: 1971-02-01 		751.40 ft above NGVD29
Service spillway crest elevation 819.52 ft above NAVD88
Top of flood gate elevation 841.52 ft above NAVD88
Emergency spillway crest elevation 866.00 ft above NAVD88
Flood pool elevation 851.00 ft above NAVD88
Maximum design elevation 871.22 ft above NAVD88
Top of dam elevation 874.00 ft above NAVD88
Conservation pool elevation
Start date: 1971-02-01 		836.00 ft above NAVD88
Conservation pool elevation
End date: 1969-02-01 		836.00 ft above NGVD29
Conservation pool elevation
Start date to end date: 1969-02-01 to 1971-02-01 		840.00 ft above NGVD29
Data download (CSV) period of record, last one year, last 30 days

Elevation-Area-Capacity Curves

1931-01-01 (source: USGS)
2000-04-01 (source: TWDB) : GIS Data
2010-12-01 (source: TWDB) : GIS Data
2020-10-01 (source: TWDB) : GIS Data
Data Source USGS:08043000
USGS Monitoring Location USGS:08043000

Lake Location