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Portland : Johnson Creek watershed : Summaries of resource site inventories

158 pp. OCR and bookmarks supplied by UO. Maps, tables. Published June, 1998. Captured November 25, 2008.
Portland : Flood management amendments to the Johnson Creek Basin plan district (1998)

14 pp. OCR and bookmarks supplied by UO. Maps. Adopted April 29, 1998. Captured August 21, 2009.
Portland : Johnson Creek Basin protection plan

182 pp. OCR and bookmarks supplied by UO. Maps, tables, figures. Adopted July 17, 1991. Captured November 25, 2008.

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