Monticello Reservoir: 84.8% full as of 2023-03-22

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)
Today 2023-03-22 84.8 337.24 29,449 29,449 34,740 1,751
Yesterday 2023-03-21 84.7 337.23 29,431 29,431 34,740 1,750
2 days ago 2023-03-20 84.7 337.23 29,431 29,431 34,740 1,750
1 week ago 2023-03-15 84.8 337.25 29,467 29,467 34,740 1,752
1 month ago 2023-02-22 85.7 337.42 29,773 29,773 34,740 1,768
3 months ago 2022-12-22 81.3 336.56 28,251 28,251 34,740 1,690
6 months ago 2022-09-22 78.5 335.98 27,263 27,263 34,740 1,637
1 year ago 2022-03-22 80.7 336.44 28,044 28,044 34,740 1,679
*

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 2023-03-22 16:15 337.24 340.00 -2.76
1 hour prior 2023-03-22 15:15 337.22 340.00 -2.78
2 hours prior 2023-03-22 14:15 337.23 340.00 -2.77
6 hours prior 2023-03-22 10:15 337.24 340.00 -2.76
12 hours prior 2023-03-22 04:15 337.24 340.00 -2.76
24 hours prior 2023-03-21 16:15 337.22 340.00 -2.78
48 hours prior 2023-03-20 16:15 337.24 340.00 -2.76
*

Data is provisional and subject to revision.

Additional Information

Impoundment date 1973-01-01
Gauge USGS:07344488
Vertical datum NGVD29
Service spillway crest elevation 328.00 ft above NGVD29
Top of flood gate elevation 342.00 ft above NGVD29
Emergency spillway crest elevation 343.50 ft above NGVD29
Top of dam elevation 352.00 ft above NGVD29
Conservation pool elevation 340.00 ft above NGVD29
Data download (CSV) period of record, last one year, last 30 days

Elevation-Area-Capacity Curves

1998-02-01 (source: TWDB) : GIS Data

Lake Location