▁FM ▁ 1 0 6 0 . ▁ ▁FM ▁ 5 2 0 ▁was ▁designated ▁on ▁May ▁ 2 3 , ▁ 1 9 5 1 , ▁from ▁SH ▁ 1 1 7 ▁( ren umber ed ▁SH ▁ 1 5 ▁on ▁October ▁ 2 6 , ▁ 1 9 5 4 , ▁this ▁portion ▁of ▁SH ▁ 1 5 ▁transferred ▁to ▁SH ▁ 2 0 7 ▁on ▁September ▁ 1 , ▁ 1 9 6 5 ) ▁west ▁to ▁McK ib ben . ▁SH ▁ 1 1 7 ▁was ▁ren umber ed ▁SH ▁ 1 5 ▁on ▁October ▁ 2 6 , ▁ 1 9 5 4 . ▁On ▁September ▁ 2 1 , ▁ 1 9 5 5 , ▁FM ▁ 5 2 0 ▁extended ▁west ▁to ▁FM ▁ 2 7 8 ▁( this ▁section ▁transferred ▁to ▁SH ▁ 1 3 6 ▁on ▁November ▁ 2 1 , ▁ 1 9 6 3 ). ▁On ▁May ▁ 2 5 , ▁ 1 9 7 6 , ▁FM ▁ 5 2 0 ▁extended ▁west ▁to ▁FM ▁ 1 0 6 0 , ▁comple ting ▁its ▁current ▁length . ▁ ▁FM ▁ 5 2 0 ▁( 1 9 4 5 ) ▁ ▁The ▁first ▁FM ▁ 5 2 0 ▁was ▁designated ▁on ▁July ▁ 9 , ▁ 1 9 4 5 , ▁from ▁SH ▁ 6 ▁at ▁Al ta ▁L oma ▁north ▁to ▁FM ▁ 5 1 7 ▁between ▁Dick inson ▁and ▁Al vin . ▁The ▁route ▁was ▁cancel led ▁on ▁January ▁