Preheat oven to 425°F (220°C).
In a saucepan, combine raisins and water. Cook over medium heat until raisins are plump, about 10 minutes.
In a small bowl, mix sugar, cornstarch, cinnamon, and salt. Stir into raisin mixture. Cook until thickened, about 5 minutes. Remove from heat and stir in lemon juice and butter. Let cool.
In a bowl, combine flour and salt for the crust. Cut in shortening until mixture resembles coarse crumbs. Gradually add cold water, tossing with a fork until dough forms a ball.
Divide dough in half. Roll out one half to fit a 9-inch pie plate. Transfer dough to pie plate. Trim even with edge.
Add cooled raisin filling. Roll out remaining dough and place over filling. Trim, seal, and flute edges. Cut slits in top.
Bake in preheated oven for 30-35 minutes or until crust is golden brown. Cool on a wire rack.