Guano 'Mining'
Connected Sites
| Site | Rationale | Link |
| Carlsbad Caverns | "Mining for guano and tourism have had some effects on the integrity of some of the 81 caves found in CCNP. During the period 1903-1923 an estimated 100,000 tons of bat guano was removed by hand tools from the entrance areas of the accessible caves" (AB Eval) | |
| Grand Canyon | Bat Cave Mine was the site of significant investment to extract guano commercially in the 1950s - but small volumes and low price made the project unsuccessful. The mine is on the north side of the Colorado river and became a part of the National Park in 1974 (pre-inscription). An aerial ropeway was built to take the guano to the south rim within the Hualapai Indian Reservation at "Guano Point" (outside the NP). | |
| Papahanaumokuakea | "In 1890, Laysan was leased by the Hawaiian Kingdom to the North Pacific Phosphate and Fertilizer Company for a period of 20 years. Guano mining and digging occurred on Laysan from 1892 to 1904. This period saw the construction of several buildings, including a lighthouse and a small railroad, which supported this trade; between 100 and 125 tons of guano could be shipped from Laysan per day" Nomin file. |
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