358 



PARKS 



opposed to this type of pool, because of the problems of sanitation and 

 administration which they develop. When filled, a pool of this sort must 

 have constant supervision to ensure the children's safety. A bathhouse for 

 changing of clothes, and equipped with showers, should be provided, and the 

 same provisions should be taken for keeping the water pure as in the case of 

 swimming pools. The cost of changing the water and fencing the pool area 

 is another factor which must be considered. 



In some cities the problem of providing wading-swimming pools is 

 solved by having a pool of comparatively uniform depth, for example, three 

 feet. The pool may be filled during part of the day for use as a swimming 

 pool, after which the water is lowered to a depth of twelve to eighteen inches, 

 when it is used by the small children for wading. This arrangement over- 

 comes some of the objections to the type of pool described above, but it 

 is not an ideal one. Because the wading-swimming pool has been used in 

 many cities, it is given a place in this chapter, but the problems such a 

 pool presents should be considered carefully before this feature is included 

 in a park or playground. 



Swimming pools. The problems involved in the design and construc- 

 tion of swimming centers are so many and varied that it will be impossible 

 to enter into an intensive consideration of the subject in this manual. 

 Among these problems, which vary with each individual pool, are layout, 

 structural design, waterproofing, plumbing and mechanical equipment, fin- 



PLATE No. 155.* ILLUSTRATING A TYPE OF WADIXG-SWIMMING POOL FOR CHILDREN 



(Used extensively in the system of children's playgrounds, Park and Recreation Department, Dallas, Texas.) 

 1 Used through the courtesy of the Portland Cement Association. 



