Twin Buttes Reservoir: 10.3% full as of 2026-04-07

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 2026-04-07 10.3 1,902.93 22,587 18,838 182,454 1,566
1 day prior 2026-04-06 10.4 1,902.98 22,663 18,914 182,454 1,570
2 days prior 2026-04-05 10.4 1,903.03 22,741 18,992 182,454 1,573
1 week prior 2026-03-31 10.5 1,903.17 22,964 19,215 182,454 1,583
1 month prior 2026-03-07 11.5 1,904.24 24,689 20,940 182,454 1,660
3 months prior 2026-01-07 11.9 1,904.68 25,425 21,676 182,454 1,692
6 months prior 2025-10-07 13.4 1,906.23 28,157 24,408 182,454 1,852
1 year prior 2025-04-07 7.1 1,898.82 16,786 13,037 182,454 1,283
*

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 2026-04-07 23:00 1,902.90 1,940.20 -37.30 below flood pool
1 hour prior 2026-04-07 22:00 1,902.90 1,940.20 -37.30 below flood pool
2 hours prior 2026-04-07 21:00 1,902.91 1,940.20 -37.29 below flood pool
6 hours prior 2026-04-07 17:00 1,902.92 1,940.20 -37.28 below flood pool
12 hours prior 2026-04-07 11:00 1,902.93 1,940.20 -37.27 below flood pool
24 hours prior 2026-04-06 23:00 1,902.95 1,940.20 -37.25 below flood pool
48 hours prior 2026-04-05 23:00 1,903.00 1,940.20 -37.20 below flood pool
*

Data is provisional and subject to revision.

Additional Information

Impoundment date 1963-01-01
Vertical datum NGVD29
Dead pool elevation 1,885.00 ft above NGVD29
Emergency spillway crest elevation 1,969.10 ft above NGVD29
Flood pool elevation 1,969.10 ft above NGVD29
Maximum design elevation 1,985.00 ft above NGVD29
Top of dam elevation 1,991.00 ft above NGVD29
Conservation pool elevation 1,940.20 ft above NGVD29
Data download (CSV) period of record, last one year, last 30 days

Elevation-Area-Capacity Curves

1964-01-01 (source: USBR)
Data Source USGS:08131200

Lake Location