Stillhouse Hollow Lake: 89.2% full as of 2018-02-23

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 2018-02-23 89.2 618.01 203,118 203,064 227,771 5,904
Yesterday 2018-02-22 89.0 617.96 202,823 202,769 227,771 5,891
2 days ago 2018-02-21 88.9 617.91 202,529 202,475 227,771 5,877
1 week ago 2018-02-16 88.4 617.72 201,417 201,363 227,771 5,829
1 month ago 2018-01-23 89.3 618.07 203,472 203,418 227,771 5,919
3 months ago 2017-11-23 92.9 619.42 211,615 211,561 227,771 6,121
6 months ago 2017-08-23 98.8 621.56 225,001 224,947 227,771 6,392
1 year ago 2017-02-23 100.0 623.28 236,181 227,771 227,771 - n.a. -
*

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 2018-02-23 16:00 618.04 622.0 -4.0 below flood pool
1 hour prior 2018-02-23 15:00 618.03 622.0 -4.0 below flood pool
2 hours prior 2018-02-23 14:00 618.03 622.0 -4.0 below flood pool
6 hours prior 2018-02-23 10:00 618.04 622.0 -4.0 below flood pool
12 hours prior 2018-02-23 04:00 618.00 622.0 -4.0 below flood pool
24 hours prior 2018-02-22 16:00 617.97 622.0 -4.0 below flood pool
48 hours prior 2018-02-21 16:00 617.91 622.0 -4.1 below flood pool
*

Data is provisional and subject to revision.

Additional Information

Impoundment date 1968-01-01
Vertical datum NGVD29
Gauge USGS:08104050
Dead pool elevation 515.0 ft above NGVD29
Emergency spillway crest elevation 666.0 ft above NGVD29
Flood pool elevation 666.0 ft above NGVD29
Maximum design elevation 693.2 ft above NGVD29
Top of dam elevation 698.0 ft above NGVD29
Conservation pool elevation 622.0 ft above NGVD29
Data download (CSV) period of record, last one year, last 30 days

Elevation-Area-Capacity Curves

1968-01-01 (source: usgs)
2005-05-01 (source: twdb) : GIS Data

Lake Location