Reduced Draft on Croton System and High Water Causes Overflow of Cornell Dam
The illustration herewith shows the great surplus of water now flowing over the Cornell Dam of the Croton System, New York City water supply. In referring to this condition William W. Brush, deputy chief engineer of the New York department of water supply, gas and electricity, explains that the draft upon the Croton system has been greatly lessened since the recent improvements in the Catskill supply, with a consequent increase in its surplus. Mr. Brush writes:
“With the completion of the installation of the additional pipe siphons on the Catskill aqueduct in December 1924, the amount of water supplied from the Catskill system was increased and now is averaging about 580 m. g. d. As a result, the draft from the Croton system has been reduced to about 175 m. g. d. whereas a year ago it was about 250 m. g. d. The Croton reservoirs were well filled and flow began over the dam at 9 a. m. on February 12th. Since then about 1000 m. g. d. have been flowing over the dam.
“At the present time the municipal system is supplying nearly 800 m. g. d. and as the available supply is greater than the present draft, the reduction in the draft is mainly on the Croton system, the waters from which have to be pumped to serve the higher ground. Gradually the pumping will have to be resumed to meet the yearly increase in the consumption and with the additional pumping from the Croton system the water yearly flowing over the Croton dam will be correspondingly reduced.”