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Interchange 9A, Missouri Interchange 9A is a crossing located in St. Louis County, MO at N38.74956° W90.33831° (NAD83) and at an elevation of 570 ft MSL. It can be seen on the USGS 1:24K topographic map Clayton, MO.
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Note: Coordinates in the location and feature list above are referenced to NAD83 datum. |