Cascade, Idaho. Is consists of eight segments and has a total length of about six meters. It has three industry tracks with a total of about 14 spots, a three meter long passing siding and a wye to connect a to a branch or turn trains. The prototype Photo: RICHARD STEINHEIMER, 1960s, private collection Photo: LEE RUSSELL, 1941, LIBRARY OF CONGRESS The Module Trackplan for the Cascade module (dark) with two extensions.