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

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

Water System Reservoir Percent Full* Days of Storage**
City of Frostburg
Piney **** ****
City of Cumberland Lake Gordon 100% 417
Lake Koon 95%
City of Baltimore
Liberty 84% 293
Loch Raven 94%
Prettyboy 79%
Total 86%
Triadelphia Reservoir 30%***** 58*****
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 2018-02-06 at 10:00 AM
*****Triadelphia has been drawn down for a two-year project to rehabilitate Brighton Dam.


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