Wayne Ives, Hydrologist for the Watershed Management Bureau, NH DES has announced a third relief pulse from Dolloff Dam.
“I am scheduling a relief pulse on September 16, Tuesday. This relief pulse will be another 10.5 cfs release from Dolloff Dam only. The relief pulse will result in 0.05 feet (0.6 inches) of lake level decline. (See graph.)
Pawtuckaway Lake elevation is 249.69 feet; 0.71 feet below the full level of 250.4 feet.
Mendums is drained and too low to provide flow even by pumping.
Lamprey flow is 7.94 cfs – below both the critical and rare flow criteria. By September 16 the time below the protected flow threshold will exceed the rare duration criteria. (See graph.)
There has been no significant rain. The rain forecast for this weekend shows only a little, likely too little, rain.”