| Title |
Record Date
|
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|
|
A2007-002.4216 : The Dalles Dam spillways | 03/18/1972 | ||
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A2007-002.4217 : The Dalles Dam, escape hatch for water | 04/16/1965 | ||
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A2007-002.4213 : Bonneville Dam, four giant towers | 04/16/1964 |