Reservoir Volumes and Storage for Drought Monitoring as of December 31, 2018

​​Storage in selected Maryland reservoirs for the end of December, 2018​

Water System Reservoir Percent Full* Days of Storage**
City of Frostburg
Piney 99% 622
City of Cumberland Lake Gordon **** ****
Lake Koon ****
City of Baltimore
Liberty 100% 341
Loch Raven 100%
Prettyboy 100%
Total 100%
Triadelphia Reservoir***** 70% 142
Rocky Gorge/Duckett
Seneca Creek Reserve 78% 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 number of days available to meet the system's demand.

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

**** Data was not available as of the end of December

*****Triadelphia has been drawn down for a two-year project to rehabilitate Brighton Dam.


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For More Information
Please contact the Water Supply Program at​ or 410-537-3702