Notes

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: 11.7% full as of 2023-02-06

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 2023-02-06 11.7 2,618.58 7,451 7,019 59,968 476
Yesterday 2023-02-05 11.7 2,618.58 7,451 7,019 59,968 476
2 days ago 2023-02-04 11.7 2,618.58 7,451 7,019 59,968 476
1 week ago 2023-01-30 11.7 2,618.60 7,460 7,028 59,968 476
1 month ago 2023-01-06 11.8 2,618.66 7,486 7,054 59,968 477
3 months ago 2022-11-06 12.3 2,619.39 7,829 7,397 59,968 491
6 months ago 2022-08-06 13.9 2,621.20 8,776 8,344 59,968 526
1 year ago 2022-02-06 16.2 2,623.58 10,129 9,697 59,968 577
*

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 2023-02-06 15:30 2,618.57 2,664.00 -45.43
1 hour prior 2023-02-06 14:30 2,618.59 2,664.00 -45.41
2 hours prior 2023-02-06 13:30 2,618.58 2,664.00 -45.42
6 hours prior 2023-02-06 09:30 2,618.58 2,664.00 -45.42
12 hours prior 2023-02-06 03:30 2,618.58 2,664.00 -45.42
24 hours prior 2023-02-05 15:30 2,618.57 2,664.00 -45.43
48 hours prior 2023-02-04 15:30 2,618.57 2,664.00 -45.43
*

Data is provisional and subject to revision.

Additional Information

Impoundment date 1968-01-01
Gauge USGS:07299840
Vertical datum NGVD29
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