Monticello Reservoir: 73.2% full as of 2026-10-04
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 | 2026-10-04 | 73.2 | 334.84 | 25,438 | 25,438 | 34,740 | 1,555 |
| Yesterday | 2026-10-03 | 73.1 | 334.82 | 25,407 | 25,407 | 34,740 | 1,554 |
| 2 days ago | 2026-10-02 | 73.3 | 334.85 | 25,454 | 25,454 | 34,740 | 1,556 |
| 1 week ago | 2026-09-27 | 73.4 | 334.89 | 25,516 | 25,516 | 34,740 | 1,558 |
| 1 month ago | 2026-09-04 | 75.8 | 335.40 | 26,320 | 26,320 | 34,740 | 1,593 |
| 3 months ago | 2026-07-04 | 81.3 | 336.55 | 28,234 | 28,234 | 34,740 | 1,689 |
| 6 months ago | 2026-04-04 | 79.3 | 336.16 | 27,566 | 27,566 | 34,740 | 1,654 |
| 1 year ago | 2025-10-04 | 80.6 | 336.41 | 27,993 | 27,993 | 34,740 | 1,676 |
*
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 | 2026-10-04 16:15 | 334.88 | 340.00 | -5.12 |
| 1 hour prior | 2026-10-04 15:15 | 334.88 | 340.00 | -5.12 |
| 2 hours prior | 2026-10-04 14:15 | 334.87 | 340.00 | -5.13 |
| 6 hours prior | 2026-10-04 10:15 | 334.88 | 340.00 | -5.12 |
| 12 hours prior | 2026-10-04 04:15 | 334.81 | 340.00 | -5.19 |
| 24 hours prior | 2026-10-03 16:15 | 334.81 | 340.00 | -5.19 |
| 48 hours prior | 2026-10-02 16:15 | 334.84 | 340.00 | -5.16 |
*
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
