356 PARKS 



pool from frequent rains during the winter it is also desirable to cover this 

 outlet with a box arrangement so that any free water will be drained through 

 a mass of salt, thus creating a saline solution. This will often prevent any 

 ice forming over the drain outlet. 



COST DATA 



Clay lining for lily pond. This pond was long, narrow, irregular and 

 about 90 square yards in extent. Some large stones were embedded in the 

 bank after a layer of clay was placed. This layer was four inches thick 

 after compacting. All work was hand labor and the materials were mixed 

 dry in batches of one-half cubic yard on a platform lox 14 feet. 



Hours per Hours per 



Item cubic yard square yard 



Screening gravel twice 2 2 



Breaking up and screening clay 3 



Mixing clay, sand and gravel i 



Wheeling and spreading I 



Wetting and ramming I 



Total . ~8 



Where a job was about 900 square yards in area and teams could be 

 used the cost was as follows: 



Hours per Hours per 



Item cubic yard square yard 



Wheeling and spreading by hand I .in 



Mixing by harrowing (two-horse teams) .25 .028 



Wetting, including laying and removing temporary pipe (160 feet) .25 .028 



Rolling with two-horse sectional roller (weight 3,400 pounds) .25 .028 



Total man hours 1.25 .139 



Total team hours .50 .056 



Tile setting for pool linings. The following figures are for setting tiles 

 on the walls and floor of an ordinary pool after a scratch coat has been 

 applied and the surface trued up to receive the tile. Each tile setter has 

 one helper and the tile must be unpacked and alongside the job. 



Labor hours per square foot 



Item Size of tile Tile setter Helper 



Grueby faience in a repeating design and 3 or 4 shades ... 4x4 inches 



Curved walls .4 .4 



Straight walls * .2 .2 



Floor .08 .08 



Grueby faience, one color 4x4 inches 



Curved walls .264 .264 



Straight walls .132 .132 



Floor .053 .053 



Ceramic tile ^ to I inch square 



Straight walls .16 .16 



Floor .05 .05 



Ceramic tile hex. ^ to I inch 



Straight walls .16 .16 



Floor .04 .04 



Wading pools. Most wading pools on playgrounds vary in depth from 

 zero at the shallow end or edge to eighteen or twenty-four inches at the 

 deepest point. The size depends largely upon the area of the playground 



