Reservoir Volumes and Storage for Drought Monitoring as of April 30, 2018

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

Water System Reservoir Percent Full* Days of Storage**
City of Frostburg
Piney 99% 752
City of Cumberland Lake Gordon **** ****
Lake Koon ****
City of Baltimore
Liberty 99% 329
Loch Raven 100%
Prettyboy 94%
Total 98%
Triadelphia Reservoir***** 55% 103*****
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 allotted amount of water in reservoir used to supplement Potomac River flow for drinking water purposes.
**** Data is not available as of 2018-05-08 at 2:00 PM

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


Related Topics

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