Monticello Reservoir: 77.9% full as of 2026-08-14
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 | 2026-08-14 | 77.9 | 335.87 | 27,079 | 27,079 | 34,740 | 1,628 |
| Yesterday | 2026-08-13 | 78.0 | 335.89 | 27,112 | 27,112 | 34,740 | 1,629 |
| 2 days ago | 2026-08-12 | 78.2 | 335.92 | 27,162 | 27,162 | 34,740 | 1,632 |
| 1 week ago | 2026-08-07 | 78.5 | 335.99 | 27,280 | 27,280 | 34,740 | 1,638 |
| 1 month ago | 2026-07-14 | 81.2 | 336.54 | 28,217 | 28,217 | 34,740 | 1,688 |
| 3 months ago | 2026-05-14 | 81.1 | 336.52 | 28,182 | 28,182 | 34,740 | 1,686 |
| 6 months ago | 2026-02-14 | 78.5 | 335.99 | 27,280 | 27,280 | 34,740 | 1,638 |
| 1 year ago | 2025-08-14 | 82.1 | 336.72 | 28,529 | 28,529 | 34,740 | 1,704 |
*
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 | 2026-08-14 15:15 | 335.88 | 340.00 | -4.12 |
| 1 hour prior | 2026-08-14 14:15 | 335.88 | 340.00 | -4.12 |
| 2 hours prior | 2026-08-14 13:15 | 335.88 | 340.00 | -4.12 |
| 6 hours prior | 2026-08-14 09:15 | 335.85 | 340.00 | -4.15 |
| 12 hours prior | 2026-08-14 03:15 | 335.87 | 340.00 | -4.13 |
| 24 hours prior | 2026-08-13 15:15 | 335.91 | 340.00 | -4.09 |
| 48 hours prior | 2026-08-12 15:15 | 335.90 | 340.00 | -4.10 |
*
Data is provisional and subject to revision.
Additional Information
| Impoundment date | 1973-01-01 |
| Vertical datum | NGVD29 |
| Service spillway crest elevation | 328.00 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
|
|
| Data Source | USGS:07344488 |
| USGS Monitoring Location | USGS:07344488 |
Lake Location
