1918
Cascade power plant completed at cost of $215,000. USNPS, 1917, pp. 61, 143; 1918. pp. 45, 134.
Ledge Trail built. USNPS, 1918, p. 47.
Cascade power plant completed at cost of $215,000. USNPS, 1917, pp. 61, 143; 1918. pp. 45, 134.
Ledge Trail built. USNPS, 1918, p. 47.