Monticella Dam .

Monticello Dam is a dam in Napa County, California, constructed between 1953 and 1957. The dam is a medium concrete-arch dam with a structural height of 93 meters and a crest length of 312 meters. It contains 326,000 cubic yards (249,000 m³) of concrete and is often referred as the glory hole or black hole. 



Filed under Life on Earth .

3 responses to “Monticella Dam .

  1. Very interesting! Amazing!

  2. steve

    awesomeeee. the=at thing would suck you in if you got to close to it in the water

  3. Pingback: Anonymous

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