. Electric railway journal . gh, frame-bent larger of these tres-tles, which was 156 and 784 ft. long, hasbeen replaced by a heavysteel structure. The otherframe structures are beingfilled in, water passagesbeing provided by largereinforced concrete this work nearly 300,-000 cu. yd. of dirt willhave to be handled. Several of the more haz-ardous locations on theroad have been protectedby the installation of Gen-eral Railway Signal Com-pany light signals. Twelveblocks are now in opera-tion and it is expectedthat four more will be in-stalled. The signal de-partment re
. Electric railway journal . gh, frame-bent larger of these tres-tles, which was 156 and 784 ft. long, hasbeen replaced by a heavysteel structure. The otherframe structures are beingfilled in, water passagesbeing provided by largereinforced concrete this work nearly 300,-000 cu. yd. of dirt willhave to be handled. Several of the more haz-ardous locations on theroad have been protectedby the installation of Gen-eral Railway Signal Com-pany light signals. Twelveblocks are now in opera-tion and it is expectedthat four more will be in-stalled. The signal de-partment reports the suc-cessful use of commercial40-watt concentrated fila-ment lamps in these day-light signals. These lampsmay be focussed more ac-curately than ordinarymazda lamps, thus increas-ing the effectiveness of thesignal illumination, it is said, from 30 to 50 per cent. The Fort Dodge Line has built up a comparativelylarge lighting and power load, which is fed from its rail-way transmission system. Energy is sold in bulk to. municipalities for lighting purposes, is retailed at manyof the smaller towns on branch transmission lines andis sold to coal and clay-working mines. Trolley currentat a potential of 1200 volts is sold to grain elevators at various points along theline, and in the Des MoinesRiver valley a number ofsand-pump motors are fedby an alternating-current,2300-volt distributing cir-cuit. These sand-pumpoutfits require from 100 to200 hp. each. At FortDodge, the company oper-ates the street cars, lightsthe city and supplies en-ergy for operating thegypsum mills, several clayworks and other industries. Power GenerationDistribution and FORT DODGE LINE—MAP SHOWING PROPOSED ADDITIONS The power supply is ob-tained from a single gen-erating station located onthe Des Moines River atFraser, about the midpointof the main line betweenDes Moines and FortDodge. The fuel problemis simple because there arecoal mines near the plantand the road operates onemine located at Ogden, 8
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