Engineering and Contracting . Flad, entitled: Reinforced ConcreteReservoir and Coagulation Plant at St. Louis, three Reisert filters, recently completed, whichare rectangular in plan, each being approxi-mately 34 by 15 ft. Chemical Treatment.—The water is settledby addmg sulphate of aluminum (alum) andlime. A special three-story reinforced con-crete building is provided for storing and pre-paring the chemicals. The hopper for* storing the lime is 36 by 9by 14 fi. high, and has a cap^ity of 90 is placed in a pit so that it can be filleddirectly by shoveling from the cars. An elec-tric e
Engineering and Contracting . Flad, entitled: Reinforced ConcreteReservoir and Coagulation Plant at St. Louis, three Reisert filters, recently completed, whichare rectangular in plan, each being approxi-mately 34 by 15 ft. Chemical Treatment.—The water is settledby addmg sulphate of aluminum (alum) andlime. A special three-story reinforced con-crete building is provided for storing and pre-paring the chemicals. The hopper for* storing the lime is 36 by 9by 14 fi. high, and has a cap^ity of 90 is placed in a pit so that it can be filleddirectly by shoveling from the cars. An elec-tric elevator conveys to the third floor thehand-cars containing the lime or alum. The alum is dissolved in a concrete tank,and is fed to the water by gravity. This alumtank has three rectangular divisions, each 10by 7 by 3 ft. deep. Each division is chargedwith from -jOO to 2,000 lbs. of alum which isdissolved in water. It requires from two tofive hours to dissolve one charge. The limeis slacked in iron tanks on the third Fig. 1. General Plan of Old (Steel) and New Reinforced Concrete Settling Reservoirs at Anheuser-Busch Brewery, St. Louis, Mo. A disputed point between the fire bureau andthose in control of the high-pressure systemas to the limit to be placed uponthe pressure in the mains in case of fire hasbeen definitely settled. A conference, attend-ed by city and fire department officials, andof insurance representatives decided that 250lbs. w:i:; a safe limit to be placed on the pres-suri- at the hydrants, except in case of extraor-dinary emergency. It was agreed that an in-creascr! pressure carried with it serious dangerof blowing out the system at several pointsat once, tliereby depriving the fire bureau ofthe entire use of the high pressure. It was also agreed that this pressure wassufficient to supply all the water that couldbe controlled or would be required at any fireexcept a serious conflagration. Short Course in Highway Engineering atthe University
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