Use task force $25,$Caroll $(0\mathrm{.}95<2\mathrm{.}5*$d$85),$ and Giroud methos respectively to design a needle$-$punched, nonwoven geotextile for use in a primary leachate drainage layer $($use average data from table $8\mathrm{.}5).$The geotextile is placed between a protective and sand blanker and geonet as filtration layer like shown in figure $8\mathrm{.}3.$Typical properties od needle$-$punched nonwoven geotextiles are shown in table $8\mathrm{.}2$ and $8\mathrm{.}3.$The hydraulic gradient for filtration is $1\mathrm{.}5.$The maximum leachate percolation rate at the time of landfill opening is $40$ inches per year. The soil placed over the geotextile is a well$-$graded sand $($SW$)$ in a medium $-$dense state $($Dr$=70\%).$ Information about the soil gradation is as follows: $13\%$ soil particles passing the No$\mathrm{.}200$ sieve, D$60/$d$10=6\mathrm{.}6,$ D$85=1\mathrm{.}2$ mm D$50=0\mathrm{.}275$ mm