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A Portland Water Bureau reservior exists under Powell Butte. |
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And more such storage is being planned. |
What is under Powell Butte?
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A Portland Water Bureau reservior exists under Powell Butte. |
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And more such storage is being planned. |
| Actually, most of what is under Powell Butte is the volcanic rock pipe extending down to the magma chambers deep in the Earth. Powell Butte is a currently inactive volcano, as are most of the isolated hills in the region. |
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