1907-1912 - Boise & Interurban Railway Co.
1912-1915 - Idaho Railway Light & Power Co.
1915-1928 - Boise Valley Traction Co.
Interurban lines:
Boise-Caldwell (1907-1928)
1906-1912 - Boise Valley Railway Co.
1912-1915 - Idaho Railway Light & Power Co.
1915-1928 - Boise Valley Traction Co.
Interurban lines:
Boise-Meridian (1906-1928)
Meridian-Nampa (1910-1928)
Nampa-Caldwell (1912-1928)
1913-1924 - Caldwell Traction Co.
Interurban lines:
Caldwell-McNeil (1913-1924)
Caldwell-Lake Lowell (1913-1918)
Caldwell-Wilder (1918-1920)