Engineering and Contracting . lroad completed a dykefor a portion of the area subject to floods. The dyked area was still subject, however,to the backing up of water in the sewers holes were provided with watertight action was necessary in order to preventany drainage or leakage reaching this portionof the sewer when the land and streets aboveit are flooded. When a dyke is built to pro-tect the remaining area now subject to flood-ing these sewers which now continue to theriver will be connected to the interceptor. DESIGN OF STATION. Capacity.—The area subject to floods whichwill ev
Engineering and Contracting . lroad completed a dykefor a portion of the area subject to floods. The dyked area was still subject, however,to the backing up of water in the sewers holes were provided with watertight action was necessary in order to preventany drainage or leakage reaching this portionof the sewer when the land and streets aboveit are flooded. When a dyke is built to pro-tect the remaining area now subject to flood-ing these sewers which now continue to theriver will be connected to the interceptor. DESIGN OF STATION. Capacity.—The area subject to floods whichwill eventually be drained by pumping amounts to 160 acres. Using the formula Q^crV As,with (:==70 per cent and >^=, the runoffamounts to 217 cu. ft. per second. The lowerend of the interceptor was designed of thiscapacity. It was considered that a severestorm would seldom occur at the time of max-imum height of the river so it was thoughtsafe to design the pumping station with lesscapacity, and the pumps as installed have a. Fig. 1. Plan Showing Arrangement of Sewers and Pumps at East Side Pumping Station, Hartford, Conn. which pierced the dyke at each street. In1910 an appropriation of $200,000 was madeby the city to build an intercepting sewer tocollect all sewage and storm water from thedyked area and also, eventually, from the nowundyked area, and a pumping station to dis-pose of this runoff at times of high water inthe Connecticut River. The appropriation wasincreased by $50,000 in 1912. It is to the de-sign of the pumping station that the presentarticle chiefly relates, the article being basedon information given in the paper by Mr. Brewer, assistant city engineer of Hartford,before the recent annual convention of theConnecticut Society of Civil Engineers. The intercepting sewer was built in 1910-11and all sewers in the district were connectedto it, the old channels leading to the riverbeing blocked off. The street previously men-tioned as having been raised by the
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