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Outlet of the Santa Maria Reservoir. Mineral County, Colorado. No date.

U.S. Geological Survey · before 1918 · Atwood, W.W.

A rough channel cut through pale broken ground below a dam, scattered timber and rubble along its sides, with conifers on the rim above.
From the archive · U.S. Geological Survey · before 1918 Outlet of the Santa Maria Reservoir. Mineral County, Colorado. No date. Atwood, W.W.

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 ↗

The outlet of the Santa Maria Reservoir, Mineral County, published as a plate in USGS Bulletin 685. Santa Maria is one of the reservoirs that store the Rio Grande's headwaters.

Shows: The channel a reservoir's outlet discharges into, and what the discharge did to it.

What this does not let you conclude: The date of the exposure, or how much the outlet passed. 1918 is when the plate was printed, and no rating is given. The title says "No date". The record gives publication as Plate III-C of USGS Bulletin 685 in 1918, so the exposure is that year or earlier.

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