Trickle in the Dark - A Black Canyon of the Gunnison Story

Deep beneath the Black Canyon of the Gunnison, crews toiled in brutal, suffocating conditions to carve out one of the most ambitious engineering projects of its time—the Gunnison Tunnel. In this tense episode, we follow Foreman Grasser on what begins as a routine morning shift in the dark, sweltering depths. But when the tunnel’s ceiling gives way without warning, the day turns into a fight for survival beneath the unforgiving cliffs of the Black Canyon.