. Crofutt's new Overland tourist, and Pacific Coast guide ... over the Union, Kansas, Central and Southern Pacific Railroads, their branches and connections, by rail, water and stage .. . awattomie county, Iowa, voted, undercertain conditions, aid to the amount of|;i05,000. This bridge is a notable structure (seeillustration), one-half utile in length, withthe approaches over one mile. It is located below the old depot, and op-posite that part of the city of Omahaliuown as Train-Town, and has a singletrack. The bridge is known as a Posts Pat-ent. The hollow iron columns are 23 innumber, two fo
. Crofutt's new Overland tourist, and Pacific Coast guide ... over the Union, Kansas, Central and Southern Pacific Railroads, their branches and connections, by rail, water and stage .. . awattomie county, Iowa, voted, undercertain conditions, aid to the amount of|;i05,000. This bridge is a notable structure (seeillustration), one-half utile in length, withthe approaches over one mile. It is located below the old depot, and op-posite that part of the city of Omahaliuown as Train-Town, and has a singletrack. The bridge is known as a Posts Pat-ent. The hollow iron columns are 23 innumber, two forming a pier. The-e col-umns ure made of cast iron one-aud-three-fourths inches in thickness, 8)^ feet in di-ameter, 10feet long, and weigh 8 tons are bolted together air-tigh^, andsunk lo the bed-rock of the river, in onecase, 83 feet below low-water. Alter these columns are seated on therock fouudatiim, they are filled up twentyfeet with stone concrete, and from theconc-ete to the bridge seat, they arefilled with regular masonry. From high-water mark to the bridge seat, thesecolumns measure 50 feet. The elevenspans are 25J feet in length, making 22 PACIFIC COAST MISSOURI RIVER BRIDGE—OMAHA IN THE DISTANCE, the iron part, between abutments, 2,750 columns were cast in Chicago,and delivered in the shape ot enormousrings, 10 feet in length. When they werebeing placed in position the workmenwould take two or more rings, join themtogether, place the coumn where it was tobe sunk, cover the top with an air-lock,then force the water from the column 1)}pneumatic pressure, ranging from 10 to per square incli. The workmendescend the columns by means of rope-ladders, and fill sund-liuckets, which arehoisted through the airlock by a ])ony-en-gine. The sand is then excavated abouttwo feet below the bottom of the column,the men come out through the air- ock, aleverage, from 100 to 300 tons, is applied,the pneumatic pessure is removed, iimlthe column s
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Keywords: ., bookcentury1800, bookdecade1880, bookidcrofuttsnewo, bookyear1883
