Lost Creek Reservoir: 88.8% full as of 2026-09-10

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 2026-09-10 88.8 1,005.87 10,608 10,608 11,950 - n.a. -
1 day prior 2026-09-09 88.8 1,005.89 10,615 10,615 11,950 - n.a. -
2 days prior 2026-09-08 88.9 1,005.92 10,625 10,625 11,950 - n.a. -
1 week prior 2026-09-03 89.3 1,006.06 10,672 10,672 11,950 - n.a. -
1 month prior 2026-08-10 91.6 1,006.87 10,943 10,943 11,950 - n.a. -
3 months prior 2026-06-10 95.9 1,008.34 11,463 11,463 11,950 - n.a. -
6 months prior 2026-03-10 93.4 1,007.53 11,164 11,164 11,950 - n.a. -
1 year prior 2025-09-10 98.5 1,009.07 11,769 11,769 11,950 - 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 2026-09-10 23:15 1,005.88 1,009.50 -3.62
1 hour prior 2026-09-10 22:15 1,005.88 1,009.50 -3.62
2 hours prior 2026-09-10 21:15 1,005.88 1,009.50 -3.62
6 hours prior 2026-09-10 17:15 1,005.89 1,009.50 -3.61
12 hours prior 2026-09-10 11:15 1,005.86 1,009.50 -3.64
24 hours prior 2026-09-09 23:15 1,005.88 1,009.50 -3.62
48 hours prior 2026-09-08 23:15 1,005.91 1,009.50 -3.59
*

Data is provisional and subject to revision.

Additional Information

Impoundment date 1991-01-01
Vertical datum NGVD29
Top of dam elevation 1,028.90 ft above NGVD29
Conservation pool elevation 1,009.50 ft above NGVD29
Data download (CSV) period of record, last one year, last 30 days

Elevation-Area-Capacity Curves

Historical Rating Curve
Data Source USGS:08042820
USGS Monitoring Location USGS:08042820

Lake Location