Recent changes

2013-02-12: The rating curve for Greenbelt Reservoir has been updated and replaced with data from the Texas Water Development Board's Report 126.

Greenbelt Lake: 20.5% full as of 2019-08-21

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 2019-08-21 20.5 2,627.60 12,738 12,306 59,968 672
1 day prior 2019-08-20 20.6 2,627.63 12,758 12,326 59,968 673
2 days prior 2019-08-19 20.6 2,627.67 12,786 12,354 59,968 674
1 week prior 2019-08-14 20.8 2,627.82 12,883 12,451 59,968 679
1 month prior 2019-07-21 21.5 2,628.49 13,320 12,888 59,968 696
3 months prior 2019-05-21 21.7 2,628.69 13,462 13,030 59,968 701
6 months prior 2019-02-21 20.3 2,627.44 12,624 12,192 59,968 668
1 year prior 2018-08-21 21.6 2,628.60 13,397 12,965 59,968 699
*

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 2019-08-21 22:30 2,627.58 2,664.00 -36.42 below flood pool
1 hour prior 2019-08-21 21:30 2,627.58 2,664.00 -36.42 below flood pool
2 hours prior 2019-08-21 20:30 2,627.58 2,664.00 -36.42 below flood pool
6 hours prior 2019-08-21 16:30 2,627.60 2,664.00 -36.40 below flood pool
12 hours prior 2019-08-21 10:30 2,627.61 2,664.00 -36.39 below flood pool
24 hours prior 2019-08-20 22:30 2,627.62 2,664.00 -36.38 below flood pool
48 hours prior 2019-08-19 22:30 2,627.65 2,664.00 -36.35 below flood pool
*

Data is provisional and subject to revision.

Additional Information

Impoundment date 1968-01-01
Vertical datum NGVD29
Gauge USGS:07299840
Dead pool elevation 2,590.00 ft above NGVD29
Service spillway crest elevation 2,664.00 ft above NGVD29
Emergency spillway crest elevation 2,674.00 ft above NGVD29
Top of dam elevation 2,686.00 ft above NGVD29
Conservation pool elevation 2,664.00 ft above NGVD29
Data download (CSV) period of record, last one year, last 30 days

Elevation-Area-Capacity Curves

1974-10-01 (source: twdb)

Lake Location