Weather, river and climate charts and schematics

Friday, December 31, 1971

A2012-005

P/18387

Date is circa. Charts include: Peak Precipitation Occurences, Portland, 1940-1970 ; Distribution of Average Monthly Precipitation [Portland and Minneapolis] ; History of Fish Migrations ; Variation in Thruput with Differing Precipitation Amounts, 1970 ; Generalized Hyetograph ; Water Quality Along the Lower Willamette River ; Flow Hydrographs of the Columbia River and of the Willamette River ; River Quality 1930 - 1972 ; Schematic Layout of Ankeny Pump Station ; United States Weather Characteristics ; Annual Fish Migration ; Uncovered Detention Pond ; Mass Runoff / Precipitation Events, 1970 ; Deep Silo Detention Tanks ; Wastewater ThruputColumbia Blvd STP (GMD), 1970 ; Schematic Drawing of Sullivan Pump Station ; Cost of Complete Sewer Separation for Portland ; Thruput and Precipitation Columbia Blvd Sewage Treatment Plant ; Drainage of the Central City ; Comparison of Rainfall Pattern for Portland, Oregon with Cities Having Continental Climates

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