Lake Arlington: 100.0% full as of 2021-05-14

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)
Today 2021-05-14 100.0 550.64 41,424 40,157 40,157 - n.a. -
Yesterday 2021-05-13 100.0 550.97 42,066 40,157 40,157 - n.a. -
2 days ago 2021-05-12 100.0 551.37 42,847 40,157 40,157 - n.a. -
1 week ago 2021-05-07 100.0 550.21 40,593 40,157 40,157 - n.a. -
1 month ago 2021-04-14 93.5 548.62 37,559 37,527 40,157 1,889
3 months ago 2021-02-14 81.9 546.13 32,917 32,885 40,157 1,841
6 months ago 2020-11-14 80.1 545.73 32,182 32,150 40,157 1,834
1 year ago 2020-05-14 93.7 548.67 37,654 37,622 40,157 1,890
*

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 2021-05-14 21:00 550.53 550.00 0.53 into flood pool
1 hour prior 2021-05-14 20:00 550.53 550.00 0.53 into flood pool
2 hours prior 2021-05-14 19:00 550.54 550.00 0.54 into flood pool
6 hours prior 2021-05-14 15:00 550.59 550.00 0.59 into flood pool
12 hours prior 2021-05-14 09:00 550.64 550.00 0.64 into flood pool
24 hours prior 2021-05-13 21:00 550.80 550.00 0.80 into flood pool
48 hours prior 2021-05-12 21:00 551.21 550.00 1.21 into 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