Hubbard Creek Reservoir: 36.8% full as of 2026-09-13

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 2026-09-13 36.8 1,166.41 120,265 115,389 313,298 8,075
Yesterday 2026-09-12 36.9 1,166.43 120,427 115,551 313,298 8,082
2 days ago 2026-09-11 37.0 1,166.46 120,669 115,793 313,298 8,093
1 week ago 2026-09-06 37.3 1,166.59 121,724 116,848 313,298 8,141
1 month ago 2026-08-13 39.4 1,167.37 128,189 123,313 313,298 8,441
3 months ago 2026-06-13 44.0 1,169.02 142,670 137,794 313,298 9,135
6 months ago 2026-03-13 42.3 1,168.45 137,538 132,662 313,298 8,877
1 year ago 2025-09-13 48.9 1,170.63 157,934 153,058 313,298 9,817
*

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 2026-09-13 22:15 1,166.38 1,183.31 -16.93
1 hour prior 2026-09-13 21:15 1,166.38 1,183.31 -16.93
2 hours prior 2026-09-13 20:15 1,166.38 1,183.31 -16.93
6 hours prior 2026-09-13 16:15 1,166.39 1,183.31 -16.92
12 hours prior 2026-09-13 10:15 1,166.42 1,183.31 -16.89
24 hours prior 2026-09-12 22:15 1,166.41 1,183.31 -16.90
48 hours prior 2026-09-11 22:15 1,166.46 1,183.31 -16.85
*

Data is provisional and subject to revision.

Additional Information

Impoundment date 1962-01-01
Vertical datum NAVD88
Dead pool elevation
Start date: 2010-10-01 		1,136.31 ft above NAVD88
Dead pool elevation
End date: 2010-10-01 		1,136.00 ft above NGVD29
Service spillway crest elevation 1,176.50 ft above NGVD29
Emergency spillway crest elevation 1,194.00 ft above NGVD29
Emergency spillway crest elevation 1,197.00 ft above NGVD29
Top of dam elevation 1,208.00 ft above NGVD29
Conservation pool elevation
Start date: 2010-10-01 		1,183.31 ft above NAVD88
Conservation pool elevation
End date: 2010-10-01 		1,183.00 ft above NGVD29
Data download (CSV) period of record, last one year, last 30 days

Elevation-Area-Capacity Curves

1962-01-01 (source: USGS)
1997-02-01 (source: TWDB) : GIS Data
2018-01-01 (source: TWDB) : GIS Data
Data Source USGS:08086400
USGS Monitoring Location USGS:08086400

Lake Location