. Journal of the New England Water Works Association . ischarge, Morris MachineCo., 60 in. diameter, centrifugal dredge pumps were installed and dredgeda considerable yardage of sand and gravel out of the trench, depositing iton the downstream dam embankment, besides pumping water. In addi-tion the following pumping equipment was used: Four No. 9 Pulsometers;two 5 in. Emersons; Two Lawrence 5 in. electric centrifugals and oneWorthington electric 100 6 in. discharge, centrifugal. The quantitiesof water pumped are given in Table 2. TABLE 2.—Monthly Output of Trench Pumps in Millions ok (Ial
. Journal of the New England Water Works Association . ischarge, Morris MachineCo., 60 in. diameter, centrifugal dredge pumps were installed and dredgeda considerable yardage of sand and gravel out of the trench, depositing iton the downstream dam embankment, besides pumping water. In addi-tion the following pumping equipment was used: Four No. 9 Pulsometers;two 5 in. Emersons; Two Lawrence 5 in. electric centrifugals and oneWorthington electric 100 6 in. discharge, centrifugal. The quantitiesof water pumped are given in Table 2. TABLE 2.—Monthly Output of Trench Pumps in Millions ok (Iallon*.. March, 1921. April May June July August September. .October. . .November. .6 2 () I tecemberJanuary, L922Februarj March April May June July 85 .8 August. 70.:. 11 462 THE DEEP CORE-WALL OF THE WANAQUE DAM. Rates of 5 000 and 6 000 were pumped in February, 1922, when thelongest stretch of deep trench was open. The total pumpage was about93 000 million Bottom of Deep Core-Wall Trench.
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