Monticello Reservoir: 79.1% full as of 2026-08-03
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 | 2026-08-03 | 79.1 | 336.10 | 27,465 | 27,465 | 34,740 | 1,648 |
| Yesterday | 2026-08-02 | 79.0 | 336.09 | 27,448 | 27,448 | 34,740 | 1,647 |
| 2 days ago | 2026-08-01 | 79.2 | 336.13 | 27,516 | 27,516 | 34,740 | 1,651 |
| 1 week ago | 2026-07-27 | 80.0 | 336.29 | 27,787 | 27,787 | 34,740 | 1,665 |
| 1 month ago | 2026-07-03 | 81.3 | 336.55 | 28,234 | 28,234 | 34,740 | 1,689 |
| 3 months ago | 2026-05-03 | 81.3 | 336.55 | 28,234 | 28,234 | 34,740 | 1,689 |
| 6 months ago | 2026-02-03 | 78.4 | 335.96 | 27,229 | 27,229 | 34,740 | 1,635 |
| 1 year ago | 2025-08-03 | 83.1 | 336.92 | 28,880 | 28,880 | 34,740 | 1,722 |
*
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 | 2026-08-03 15:15 | 336.09 | 340.00 | -3.91 |
| 1 hour prior | 2026-08-03 14:15 | 336.09 | 340.00 | -3.91 |
| 2 hours prior | 2026-08-03 13:15 | 336.09 | 340.00 | -3.91 |
| 6 hours prior | 2026-08-03 09:15 | 336.10 | 340.00 | -3.90 |
| 12 hours prior | 2026-08-03 03:15 | 336.11 | 340.00 | -3.89 |
| 24 hours prior | 2026-08-02 15:15 | 336.09 | 340.00 | -3.91 |
| 48 hours prior | 2026-08-01 15:15 | 336.09 | 340.00 | -3.91 |
*
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
