COURTESY LEVEE READY COLUMBIA  - Aerial photography shows the boundaries of Peninsula Drainage District No. 1, or Pen 1. The diagonal on the left is the railroad embankment that failed in the 1948 Vanport Flood, inundating the area to the west. On the right is Interstate 5, and in between are Heron Lakes Golf Course, Portland International Raceway, Portland Expo Center and some industrial buildings and wetlands. Some say all the green space in the area could be used to handle flood waters from the Columbia RIver.
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