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: 19.9% full as of 2019-11-12

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 2019-11-12 19.9 2,627.08 12,368 11,936 59,968 659
1 day prior 2019-11-11 19.9 2,627.11 12,389 11,957 59,968 659
2 days prior 2019-11-10 19.9 2,627.10 12,382 11,950 59,968 659
1 week prior 2019-11-05 20.0 2,627.12 12,396 11,964 59,968 660
1 month prior 2019-10-12 20.3 2,627.40 12,595 12,163 59,968 667
3 months prior 2019-08-12 20.8 2,627.81 12,877 12,445 59,968 678
6 months prior 2019-05-12 21.7 2,628.67 13,447 13,015 59,968 700
1 year prior 2018-11-12 20.5 2,627.59 12,731 12,299 59,968 672
*

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 2019-11-13 01:30 2,627.10 2,664.00 -36.90 below flood pool
1 hour prior 2019-11-13 00:30 2,627.09 2,664.00 -36.91 below flood pool
2 hours prior 2019-11-12 23:30 2,627.12 2,664.00 -36.88 below flood pool
6 hours prior 2019-11-12 19:30 2,627.10 2,664.00 -36.90 below flood pool
12 hours prior 2019-11-12 13:30 2,627.03 2,664.00 -36.97 below flood pool
24 hours prior 2019-11-12 01:30 2,627.12 2,664.00 -36.88 below flood pool
48 hours prior 2019-11-11 01:30 2,627.09 2,664.00 -36.91 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