Lake Arlington: 73.9% full as of 2022-01-20

The elevation-storage rating curve used to produce the storage hydrograph is made of two segments: (1) the segment up to the conservation pool top (below the red line) is based on measured data, and (2) the segment in the flood pool (above the red line) is an extrapolation from the first segment and shouldn't be relied upon for flood storage information.

Historical Data

Date Percent Full Mean Water Level
(ft)
Reservoir Storage
(acre-ft)
Conservation Storage
(acre-ft)
Conservation Capacity
(acre-ft)
Surface Area
(acres)
Most recent 2022-01-20 73.9 544.38 29,723 29,691 40,157 1,809
1 day prior 2022-01-19 74.3 544.46 29,867 29,835 40,157 1,811
2 days prior 2022-01-18 74.7 544.54 30,012 29,980 40,157 1,813
1 week prior 2022-01-13 75.8 544.80 30,484 30,452 40,157 1,818
1 month prior 2021-12-20 79.9 545.70 32,127 32,095 40,157 1,834
3 months prior 2021-10-20 82.4 546.25 33,139 33,107 40,157 1,843
6 months prior 2021-07-20 96.6 549.28 38,811 38,779 40,157 1,904
1 year prior 2021-01-20 84.7 546.74 34,044 34,012 40,157 1,852
*

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 2022-01-21 04:30 544.34 550.00 -5.66 below flood pool
1 hour prior 2022-01-21 03:30 544.34 550.00 -5.66 below flood pool
2 hours prior 2022-01-21 02:30 544.35 550.00 -5.65 below flood pool
6 hours prior 2022-01-20 22:30 544.38 550.00 -5.62 below flood pool
12 hours prior 2022-01-20 16:30 544.40 550.00 -5.60 below flood pool
24 hours prior 2022-01-20 04:30 544.31 550.00 -5.69 below flood pool
48 hours prior 2022-01-19 04:30 544.50 550.00 -5.50 below flood pool
*

Data is provisional and subject to revision.

Additional Information

Impoundment date 1957-01-01
Vertical datum NGVD29
Gauge USGS:08049200
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

Elevation-Area-Capacity Curves

1957-01-01 (source: usgs)
2007-12-01 (source: twdb) : GIS Data

Lake Location