Lake Arlington: 81.3% 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 | 81.3 | 546.01 | 32,697 | 32,665 | 40,157 | 1,839 |
| Yesterday | 2026-08-02 | 81.8 | 546.12 | 32,899 | 32,867 | 40,157 | 1,841 |
| 2 days ago | 2026-08-01 | 82.6 | 546.29 | 33,212 | 33,180 | 40,157 | 1,844 |
| 1 week ago | 2026-07-27 | 86.4 | 547.11 | 34,730 | 34,698 | 40,157 | 1,859 |
| 1 month ago | 2026-07-03 | 90.4 | 547.96 | 36,317 | 36,285 | 40,157 | 1,875 |
| 3 months ago | 2026-05-03 | 96.9 | 549.36 | 38,963 | 38,931 | 40,157 | 1,906 |
| 6 months ago | 2026-02-03 | 91.9 | 548.30 | 36,956 | 36,924 | 40,157 | 1,882 |
| 1 year ago | 2025-08-03 | 92.0 | 548.32 | 36,993 | 36,961 | 40,157 | 1,882 |
*
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 12:15 | 545.96 | 550.00 | -4.04 |
| 1 hour prior | 2026-08-03 11:15 | 545.98 | 550.00 | -4.02 |
| 2 hours prior | 2026-08-03 10:15 | 545.98 | 550.00 | -4.02 |
| 6 hours prior | 2026-08-03 06:15 | 546.01 | 550.00 | -3.99 |
| 12 hours prior | 2026-08-03 00:15 | 546.04 | 550.00 | -3.96 |
| 24 hours prior | 2026-08-02 12:15 | 546.12 | 550.00 | -3.88 |
| 48 hours prior | 2026-08-01 12:15 | 546.28 | 550.00 | -3.72 |
*
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
