Reservoir Volumes and Storage for Drought Monitoring as of March 2014

Water System Reservoir Percent Full* Days of Storage**

City of Frostburg


99% 775
City of Cumberland

Lake Gordon

100% 380

Lake Koon


City of Baltimore


100% 326

Loch Raven



Total 100%


Triadelphia Reservoir

100% 196

Rocky Gorge/Duckett

Seneca Creek Reserve

100% NA
All Potomac River Plants

Jennings-Randolph Reserve***

100% NA

 * Percent Full is the ratio of current volume to the maximum usable volume in each reservoir at the end of the month.

** Days of Storage is the amount of days it would take to use current volume of reservoir (w/o recharge) based on average raw water withdrawals from similar time frame from previous two years.

*** Percent full for Jennings-Randolph Reservoir is based on alloted amount of water in reservoir used to supplement Potomac River flow for drinking water purposes.

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For More Information

Please contact the Water Supply Program at or 410-537-3702