Reservoir Volumes and Storage for Drought Monitoring as of December 31, 2017

​​Storage in selected Maryland reservoirs for the end of December, 2017​

Water System Reservoir Percent Full* Days of Storage**
City of Frostburg
Piney 99% 628
City of Cumberland Lake Gordon **** ****
Lake Koon ****
City of Baltimore
Liberty 84% 299
Loch Raven 90%
Prettyboy 93%
Total 88%
Triadelphia Reservoir 33%***** 67*****
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.
****Data for this reservoir has not yet been received as of 2018-12-31
*****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