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Title: Looking East towards Mt. Hood Year: 1947 Photo ID: 2543a Dimensions: H 2 1/2" x L 2 1/2" Format: Photograph (Black & White) Condition: Poor Collection: Oswego Heritage Council Repository Lake Oswego Library

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Title: Oregon Portland Cement Plant Year: Unknown Photo ID: 200 Dimensions: H 8 1/4" x W 10" Format: Photograph (Black & White) Condition: Good Collection: Local History Collection Repository Lake Oswego Library

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Title: Sewage Disposal Plant Construction Year: 1964 Photo ID: 5365 Dimensions: H 5" x L 8.5" Format: Photograph (Black & White) Condition: Good Collection: Beth Ryan Collection Repository Lake Oswego Library

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Title: Tryon Creek Treatment Plant Year: 1964 Photo ID: 5375 Dimensions: H 4" x L 6" Format: Photograph (Black & White) Condition: Good Collection: Beth Ryan Collection Repository Lake Oswego Library

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Title: Tryon Creek Treatment Plant Year: 1964 Photo ID: 5372 Dimensions: H 4.75" x W 6.75" Format: Photograph (Black & White) Condition: Good Collection: Beth Ryan Collection Repository Lake Oswego Library

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