1 Drought Update
Steven R. Ritchie
Assistant General Manager, Water
May 2, 2022
California Drought Monitor
Other
California
Reservoirs
May 2, 2022 Reservoir Storage
Reservoir
Current
Storage1,2,3
Maximum
Storage4
Available
Capacity
Percent of
Maximum
Storage
Normal
Percent of
Maximum
Storage5
(AF) (AF) (AF)
Tuolumne System
Hetch Hetchy 332,100 360,360 28,260 92.2% 68.7%
Cherry 254,000 273,345 19,345 92.9% -
Eleanor 25,570 27,100 1,530 94.4% -
Water Bank 297,758 570,000 272,242 52.2% 95.8%
Total Tuolumne Storage 909,428 1,230,805 321,377 73.9% - Local System
Calaveras 62,938 96,670 33,732 65.1% -
San Antonio 43,468 53,266 9,798 81.6% -
Crystal Springs 47,546 58,309 10,763 81.5% -
San Andreas 14,556 19,027 4,471 76.5% -
Pilarcitos 2,873 3,030 157 94.8% -
Total Local Storage 171,381 230,302 58,921 74.4% -
Total System Storage 1,080,809 1,461,107 380,298 74.0% 82.0% Total without water bank 783,051 891,107 108,056 87.9% -
Hetch Hetchy Precipitation
5 Upcountry Snowpack
Hetch Hetchy Storage
WY 2021
Hetch Hetchy Inflows
Tuolumne River Water Available
to the City
Upcountry 6-station Precipitation Index as of
May 1, 2022
Avg Annual Total: 36.68 inches
YTD Total: 23.48 inches
Bay Area 7-station Precipitation Index
as of May 1, 2022
Avg Annual Total: 22.80 inches
YTD Total: 23.28 inches
National Precipitation Forecast
Total Deliveries
Upper Tuolumne River Ecosystem Program
The Next Few Weeks
2022 Planned Spill Management
Expected Poopenaut Valley Pond Fill
Poopenaut Pond
Questions?