Engineering and Contracting . y reportsshowing distribution of laboi. The construction methods employed inbuilding large concrete and brick sewers inChicago, the corresponding unit constructioncosts, and the cost keeping system employed,were described and stated in a recent veryvaluable paper by Mr. H. R. -Abbott, of theengineering department of the Sanitary Dis-trict of Chicago, before the Illinois Societyof Engineers and Surveyors. fhe paper,practically in full, follows: Before detailing the particular sewer would point out that with the exception ofvery small stretches, all of the wo
Engineering and Contracting . y reportsshowing distribution of laboi. The construction methods employed inbuilding large concrete and brick sewers inChicago, the corresponding unit constructioncosts, and the cost keeping system employed,were described and stated in a recent veryvaluable paper by Mr. H. R. -Abbott, of theengineering department of the Sanitary Dis-trict of Chicago, before the Illinois Societyof Engineers and Surveyors. fhe paper,practically in full, follows: Before detailing the particular sewer would point out that with the exception ofvery small stretches, all of the work describedin this paper is built in good stiff blue the Sanitary District of 39th street conduit. This conduit was built in W. .iOtli St., fromWestern Ave. to Robey St.; thence south tothe west arm of the s )uth fork of the Chi-cago River. The total length was •2,34t) ft.,of which 1,868 ft., was plain concrete, a sec-tion of which is here shown as Fig. 1, and478 ft. reinforced concrete, the reinforced. -•3-5?J-3-5i-J Fig. 1. Cross Section of Plain Concrete Por-tion of tlie New West 39th St. Conduit,Chicago, III. tion being under railroad property. 11 is Ml ft. in size, of elliptical section, i on- tion was made at Western .\ve. uitii a nduit of similar section, extcndiiiK iirlh n Western .\ve. to the main channel i the Sanitary District. This section was built by ? Citv of Chicago. The conduit was de- ncd to discharge from 100 to 20(1 cu. ft. 1 second. The invert at the intake at the St arm is placed at elevation— Chicago v datum, and the conduit has a grade of 1 ft. in 10,000 ft. The flow line is about 3ft. below crown. Excavation.—Excavation was started at theWestern .\\e. end in open cut. \ BucyrusTO-ton steam shovel was used with a 1% dipper. The shovel was mounted on fivel(ixl8-in. timbers. 30 ft. long, with two I-in. material being cast ahead where the shovelcould reach it. .An iron frame or templatebuilt to the dimensions of the
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Keywords: ., bookcentury1900, bookdecade1900, bookpublisherchicago, bookyear19
