Canadian engineer . chmentareas. PORTLAND REGRADE OPERATION. Eastern cities may well look to some of their westeirnsisters for progressive ideas in civic improvement. It is well known that Seattle, Washington, has in recentyears veritably remodeled itself. From a city of steephills she has been changed to one of gentle grades. Thisgreat project was eminently successful, largely because ofthe use of high-grade modern electrical and mechanicalhydraulic apparatus. Portland, Oregon, two hundred miles to the south,noticed the miracles being worked in Seattle and is nowfollowing suit by hydraulicall
Canadian engineer . chmentareas. PORTLAND REGRADE OPERATION. Eastern cities may well look to some of their westeirnsisters for progressive ideas in civic improvement. It is well known that Seattle, Washington, has in recentyears veritably remodeled itself. From a city of steephills she has been changed to one of gentle grades. Thisgreat project was eminently successful, largely because ofthe use of high-grade modern electrical and mechanicalhydraulic apparatus. Portland, Oregon, two hundred miles to the south,noticed the miracles being worked in Seattle and is nowfollowing suit by hydraulically reducing an abrupt promin-ence within her limits, known as Goldsmiths Hill. Be-cause of the satisfaction given by the motors used to operatethe pumips which washed the hills of Seattle into the sea,these same motors were later taken to Portland, where theyare now being used to drive the pumps in the regradingthere. The same successful performance obtained in Seattlefrom the motors is being experienced in Fig. 1. Like all properly engineered projects, the Portland re-grading operations have gone through without disappoint-ments. Nothing has been left to chance; every detail ofthe work was fully considered before operations began,practically insuring the success of the undertaking. Thepumping units, including pumps and motors, were selectedbecause their fitness for the work had already been demon-strated at Seattle. The composition of Goldsmiths Hill is especiallygravelly. The streams, therefore, are directed by hugenozzles so as to undermine the lower part of the bank, andthe weight of the material above brings down the sand andgravel from the working face. From here it is washedthrough the sluice way into Guilds Lake, as shown inFig. I. The trestle supporting the sluice through which thedebris is conducted to the lake also supports two 18-inchpipes carrying the water pumped from the same lake. is a general view of the site, showing how far the workhad progres
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Keywords: ., bookcentury1800, bookdecade1890, bookpublishertoron, bookyear1893
