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Avalanche chutes, viewed from Highway 550 near Silverton. San Juan Mountains, Colorado. 1973.

U.S. Geological Survey · 1973-02 · Carrara, P.

Snow-covered peaks above a valley, with bare avalanche chutes scoured in clean pale lines down through the dark timber.
From the archive · U.S. Geological Survey · 1973-02 Avalanche chutes, viewed from Highway 550 near Silverton. San Juan Mountains, Colorado. 1973. Carrara, P.

U.S. Geological Survey, USGS Library Photographic Collection U.S. government work; public domain. Archive record ↗ · Rights

Source Archival record · verify at U.S. Geological Survey ↗

Avalanche chutes above Highway 550 near Silverton, in February 1973. Each pale stripe is a path swept often enough that trees never get established in it.

Shows: Where the San Juans' snow goes when it moves, read off the shape of the forest.

What this does not let you conclude: A snowpack figure or a hazard rating. The pattern of the chutes records many winters at once, not this one.

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