Lake Arlington: 99.8% full as of 2020-07-11

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)
Most recent 2020-07-11 99.8 549.95 40,092 40,060 40,157 1,923
1 day prior 2020-07-10 99.9 549.98 40,150 40,118 40,157 1,925
2 days prior 2020-07-09 100.0 550.04 40,265 40,157 40,157 - n.a. -
1 week prior 2020-07-04 97.6 549.50 39,230 39,198 40,157 1,909
1 month prior 2020-06-11 93.5 548.63 37,578 37,546 40,157 1,889
3 months prior 2020-04-11 97.1 549.40 39,039 39,007 40,157 1,907
6 months prior 2020-01-11 93.6 548.66 37,635 37,603 40,157 1,890
1 year prior 2019-07-11 96.5 549.27 38,792 38,760 40,157 1,904
*

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 2020-07-11 05:15 549.94 550.00 -0.06 below flood pool
1 hour prior 2020-07-11 04:15 549.96 550.00 -0.04 below flood pool
2 hours prior 2020-07-11 03:15 549.95 550.00 -0.05 below flood pool
6 hours prior 2020-07-10 23:15 549.95 550.00 -0.05 below flood pool
12 hours prior 2020-07-10 17:15 549.97 550.00 -0.03 below flood pool
24 hours prior 2020-07-10 05:15 549.99 550.00 -0.01 below flood pool
48 hours prior 2020-07-09 05:15 550.07 550.00 0.07 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