Lake Arlington: 86.2% full as of 2020-08-11

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 2020-08-11 86.2 547.06 34,638 34,606 40,157 1,858
Yesterday 2020-08-10 86.6 547.15 34,805 34,773 40,157 1,859
2 days ago 2020-08-09 87.1 547.27 35,028 34,996 40,157 1,862
1 week ago 2020-08-04 89.0 547.66 35,756 35,724 40,157 1,869
1 month ago 2020-07-11 99.6 549.92 40,034 40,002 40,157 1,922
3 months ago 2020-05-11 92.4 548.39 37,125 37,093 40,157 1,884
6 months ago 2020-02-11 99.1 549.82 39,842 39,810 40,157 1,918
1 year ago 2019-08-11 85.8 546.98 34,489 34,457 40,157 1,856
*

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 2020-08-11 12:15 547.00 550.00 -3.00 below flood pool
1 hour prior 2020-08-11 11:15 547.01 550.00 -2.99 below flood pool
2 hours prior 2020-08-11 10:15 547.03 550.00 -2.97 below flood pool
6 hours prior 2020-08-11 06:15 547.06 550.00 -2.94 below flood pool
12 hours prior 2020-08-11 00:15 547.11 550.00 -2.89 below flood pool
24 hours prior 2020-08-10 12:15 547.12 550.00 -2.88 below flood pool
48 hours prior 2020-08-09 12:15 547.27 550.00 -2.73 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