Greenbelt Lake: 8.8% full as of 2024-09-11

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 2024-09-11 8.8 2,614.45 5,738 5,306 59,968 400
Yesterday 2024-09-10 8.9 2,614.48 5,751 5,319 59,968 401
2 days ago 2024-09-09 8.9 2,614.51 5,763 5,331 59,968 401
1 week ago 2024-09-04 9.0 2,614.64 5,813 5,381 59,968 403
1 month ago 2024-08-11 9.5 2,615.37 6,118 5,686 59,968 416
3 months ago 2024-06-11 10.8 2,617.27 6,900 6,468 59,968 450
6 months ago 2024-03-11 11.2 2,617.94 7,165 6,733 59,968 463
1 year ago 2023-09-11 11.4 2,618.18 7,272 6,840 59,968 468
*

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 2024-09-11 20:30 2,614.42 2,664.00 -49.58
1 hour prior 2024-09-11 19:30 2,614.42 2,664.00 -49.58
2 hours prior 2024-09-11 18:30 2,614.42 2,664.00 -49.58
6 hours prior 2024-09-11 14:30 2,614.44 2,664.00 -49.56
12 hours prior 2024-09-11 08:30 2,614.45 2,664.00 -49.55
24 hours prior 2024-09-10 20:30 2,614.46 2,664.00 -49.54
48 hours prior 2024-09-09 20:30 2,614.49 2,664.00 -49.51
*

Data is provisional and subject to revision.

Additional Information

Impoundment date 1968-01-01
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)
Data Source USGS:07299840

Lake Location