Lake Arlington: 79.1% full as of 2026-11-02
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 | 2026-11-02 | 79.1 | 545.53 | 31,816 | 31,784 | 40,157 | 1,831 |
| Yesterday | 2026-11-01 | 79.1 | 545.53 | 31,816 | 31,784 | 40,157 | 1,831 |
| 2 days ago | 2026-10-31 | 79.1 | 545.53 | 31,816 | 31,784 | 40,157 | 1,831 |
| 1 week ago | 2026-10-26 | 79.8 | 545.68 | 32,091 | 32,059 | 40,157 | 1,833 |
| 1 month ago | 2026-10-02 | 80.0 | 545.71 | 32,146 | 32,114 | 40,157 | 1,834 |
| 3 months ago | 2026-08-02 | 81.8 | 546.12 | 32,899 | 32,867 | 40,157 | 1,841 |
| 6 months ago | 2026-05-02 | 97.2 | 549.41 | 39,058 | 39,026 | 40,157 | 1,907 |
| 1 year ago | 2025-11-02 | 91.7 | 548.25 | 36,862 | 36,830 | 40,157 | 1,881 |
*
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 | 2026-11-02 13:15 | 545.56 | 550.00 | -4.44 |
| 1 hour prior | 2026-11-02 12:15 | 545.53 | 550.00 | -4.47 |
| 2 hours prior | 2026-11-02 11:15 | 545.54 | 550.00 | -4.46 |
| 6 hours prior | 2026-11-02 07:15 | 545.52 | 550.00 | -4.48 |
| 12 hours prior | 2026-11-02 01:15 | 545.52 | 550.00 | -4.48 |
| 24 hours prior | 2026-11-01 13:15 | 545.53 | 550.00 | -4.47 |
| 48 hours prior | 2026-10-31 13:15 | 545.52 | 550.00 | -4.48 |
*
Data is provisional and subject to revision.
Additional Information
| Impoundment date | 1957-01-01 |
| Vertical datum | NGVD29 |
| Dead pool elevation | 505.00 ft above NGVD29 |
| Service spillway crest elevation | 550.00 ft above NGVD29 |
| Emergency spillway crest elevation | 559.70 ft above NGVD29 |
| Top of dam elevation | 577.50 ft above NGVD29 |
| Conservation pool elevation | 550.00 ft above NGVD29 |
| Data download (CSV) | period of record, last one year, last 30 days |
| Data Source | USGS:08049200 |
| USGS Monitoring Location | USGS:08049200 |
Lake Location
