100 KANSAS CITY REVIEW OF SCIENCE. 



areas with the sewage from higher ground to such an extent as to cause serious 

 damage to, and depreciation in the value of property so situated. 



Some of the more recent sewerage work in the East has provided for the 

 admission of one inch of rain per hour to the sewers, and if we would avoid 

 damage to property, for which the city may become responsible, it will be neces- 

 sary to make even greater provision than that ; in fact, some of our storms carry 

 water to the sewers at the rate of fully two inches per hour, or two hundred times 

 the amount of the heaviest sewerage proper. With regard to the amount o{ 

 storm-water sewerage required it will vary greatly in different localities, being the 

 greatest in the low lying lands where it is necessary on account of slight grades 

 to have larger sewers and carry them nearer to the margin of the watershed. 



An area of some two hundred acres in the low land of West Kansas City has 

 two sewers, measuring with their branches, some i i,ooo feet, draining some 300 lots 

 and leaving some 700 to be yet provided for, which would increase the sewerage 

 in this district to some 20,000 feet, of which about 5,000 feet is necessary as 

 storm-water sewer. 



In a district of some 140 acres, partly drained by the Broadway sewer, there 

 are now some 18,000 feet of sewerage, draining some 400 lots, and leaving some 

 200 yet to be provided for; the amount of storm-water sewerage required in this 

 district is about one-fifth of the whole. 



These areas are perhaps as different from each other as any in the city, and 

 indicate that of all the sewerage required, from one-fourth to one-fifth may be con- 

 sidered as necessary for storm-water, and that the remaining three-fourths or four- 

 fifths may be built on such plans as may be considered best. 



These storm-water sewers being in the lower part of the district, it would be 

 most natural to consider them as the trunks of the sewer system, and the advo- 

 cates of the combined system can find good reasons for claiming that they should 

 be so used • if used to this comparatively small extent their size can be afforded 

 ample for full efficiency, and the other sewers using them for an outlet would 

 help to keep them so clear that they will be as inoffensive as such sewers can 

 well be made. 



This would give the remainder of the area to the separate system, avoid the 

 objection of building duplicate sewers, make an unquestionable economy, and 

 perhaps reconcile the views of the advocates of the different systems as nearly as 

 it can be expected that they will be. 



As an example illustrating this proposition we will -assume an area of 300 

 acres in ^hich no sewers are yet built, and that to reach all the property in the 

 district will require six miles of sewers of which one and one-half are needed for 

 storm-water. 



One and -one-half miles of storm-water sewers . $ 36,000 

 Four and one-half miles of small sewers . . . . 26,000 



Total 62,000 



Against six miles of combined sewers 120,000 



