Twin Buttes Reservoir: 65.0% full as of 2019-09-19

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 2019-09-19 65.0 1,931.89 122,388 118,639 182,454 6,418
1 day prior 2019-09-18 65.1 1,931.92 122,576 118,827 182,454 6,427
2 days prior 2019-09-17 65.2 1,931.95 122,764 119,015 182,454 6,436
1 week prior 2019-09-12 65.7 1,932.08 123,604 119,855 182,454 6,473
1 month prior 2019-08-19 69.8 1,933.22 131,161 127,412 182,454 6,804
3 months prior 2019-06-19 75.6 1,934.71 141,605 137,856 182,454 7,236
6 months prior 2019-03-19 65.2 1,931.93 122,639 118,890 182,454 6,430
1 year prior 2018-09-19 3.7 1,893.10 10,437 6,688 182,454 978
*

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 2019-09-20 04:00 1,931.87 1,940.20 -8.33 below flood pool
1 hour prior 2019-09-20 03:00 1,931.87 1,940.20 -8.33 below flood pool
2 hours prior 2019-09-20 02:00 1,931.87 1,940.20 -8.33 below flood pool
6 hours prior 2019-09-19 22:00 1,931.88 1,940.20 -8.32 below flood pool
12 hours prior 2019-09-19 16:00 1,931.89 1,940.20 -8.31 below flood pool
24 hours prior 2019-09-19 04:00 1,931.90 1,940.20 -8.30 below flood pool
48 hours prior 2019-09-18 04:00 1,931.93 1,940.20 -8.27 below flood pool
*

Data is provisional and subject to revision.

Additional Information

Impoundment date 1963-01-01
Vertical datum NGVD29
Gauge USGS:08131200
Dead pool elevation 1,885.00 ft above NGVD29
Emergency spillway crest 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)

Lake Location