252 



THE IRRIGATION AGE. 



PLASTERING WITH A GUN 



By CARL WEBER. C. E. 



President Cement-Gun Construction Company, Chicago. 



The mortar lining applied by the Cement-Gun 

 process differs greatly from any hand-applied or 

 poured material and shows characteristics all of its 

 own. Numerous comparative tests have been made 

 to compare the qualities of "Gunite" with other 

 materials of the same composition and it has been 

 found that in every instance Gunite is vastly su- 

 perior. Tested for tension and compression the 

 strength of Gunite is from 1.5 to 4 times greater 

 than the best hand applied mortars. Gunite is 

 waterproof and adheres to hard surfaces with ut- 

 most tenacity. Steel girders have been coated with 

 Gunite and after the coating was removed by bend- 

 ing and dropping the steel members it was found 

 that a film of cement still remained on the steel, 

 protecting the same effectively against corrosion. 



These qualities make Gunite very desirable for 

 encasing of steel structures for rust prevention and 

 numerous large and small railroad bridges have 

 been protected in this manner. For the fireproofing 

 of the structural steel in large buildings, Gunite has 

 also found wide adoption and amongst others, the 

 steel work of the Woolworth building in New York 

 has received Gunite encasing. 



Another large field for Gunite work is the re- 

 pair of old disintegrating stone and concrete walls, 

 etc. Large sea walls, bridge foundations and similar 

 structures have been successfully restored even after 

 decay had gone so far as to endanger the safety of 

 the work. 



Another most successful use of Gunite has been 

 found in the waterproofing of large and small water 

 reservoirs. As stated before, Gunite is waterproof 

 on account of its density and no compounds, soap, 

 paraffin or other mixtures are ever used. Large con- 

 crete reservoirs which would not be considered safe 

 on account of excessive seepage have been treated 

 with the Cement-Gun and in a reservoir in San 

 Francisco a Gunite application of from only % mc h 

 to Y* inch thickness was found sufficient to make 

 the same absolutely safe against a water pressure of 

 about 27 feet depth. The subject of waterproofing 

 of reservoirs, etc., is of so great an importance to 

 irrigation interests that I decided to give a full ac- 

 count of the same in a later part of this paper and 

 therefore will only mention it here briefly. Just at 

 this time we are executing extremely interesting 

 work of this kind for a large water power plant in 

 Illinois and I will give a description of the same 

 with illustration in a later issue of IRRIGATION AGE. 

 (To be continued) 



RAILROADS CAN CROSS PROJECTS 



The decision of the Ninth United States Cir- 

 cuit Court of Appeals that railroads cannot be con- 

 structed across reclamation projects, even with the 

 authorization of the entrymen, without the con- 

 sent of the Secretary of the Interior, has been re- 

 versed by the Supreme court in the suit of the gov- 

 ernment to enjoin the Minidoka & Southwestern 

 Railroad Company from extending its line across 

 the South Side Minidoka Project in Idaho. 



Hess Flumes 

 Meet ALL 

 Conditions 



Curves 



Straightways 

 Hillsides 



BECAUSE the Hess joint is the only true compression 

 joint and cannot sag, shear or strip. The result is a flume 

 with a smooth interior (coefficient of friction, "N" = .001, 

 Kutter's Formula). The greatest carrying capacity of any 

 flume made. Rust-resisting and anti-corrosive metals 

 used. Assembled at one-third the cost of any other flume. 

 Several times as many in use as all other types combined. 



HESS METAL DITCH LINING prevents breaks, leakage, 

 soggy lands and cutting ditch banks. Write for literature. 



The Hess Flume Company, 2174 Fifteenth St., Denver, Col. 



or DISTRICT OFFICES : 



Seattle Portland Spokane 

 327 Yates Bldg., Boise, Idaho 



516 Mason Bldg., Los Angeles 

 1026 Kearns Bldg., Salt Lake City 



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