Monticello Reservoir: 77.5% full as of 2023-10-04

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 2023-10-04 77.5 335.77 26,914 26,914 34,740 1,620
Yesterday 2023-10-03 77.4 335.76 26,898 26,898 34,740 1,620
2 days ago 2023-10-02 77.6 335.79 26,947 26,947 34,740 1,622
1 week ago 2023-09-27 77.9 335.87 27,079 27,079 34,740 1,628
1 month ago 2023-09-04 79.5 336.19 27,617 27,617 34,740 1,656
3 months ago 2023-07-04 84.8 337.25 29,467 29,467 34,740 1,752
6 months ago 2023-04-04 86.3 337.54 29,991 29,991 34,740 1,778
1 year ago 2022-10-04 77.1 335.69 26,785 26,785 34,740 1,614
*

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 2023-10-04 18:15 335.78 340.00 -4.22
1 hour prior 2023-10-04 17:15 335.78 340.00 -4.22
2 hours prior 2023-10-04 16:15 335.77 340.00 -4.23
6 hours prior 2023-10-04 12:15 335.80 340.00 -4.20
12 hours prior 2023-10-04 06:15 335.76 340.00 -4.24
24 hours prior 2023-10-03 18:15 335.75 340.00 -4.25
48 hours prior 2023-10-02 18:15 335.77 340.00 -4.23
*

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