Seventy One is a tributary of Elk Creek in Elk County, Pennsylvania, in the United States. It is approximately 3.0 miles long and flows through St Marys. The watershed of the stream has an area of 2.33 square miles. The amounts of aluminum and iron in the stream are too small to be detectable. However, there are detectable amounts of manganese, a…Seventy One is a tributary of Elk Creek in Elk County, Pennsylvania, in the United States. It is approximately 3.0 miles long and flows through St Marys. The watershed of the stream has an area of 2.33 square miles. The amounts of aluminum and iron in the stream are too small to be detectable. However, there are detectable amounts of manganese, acidity, and alkalinity in the stream. A portion of the stream's watershed is part of a greenway. A coal bed also is found near it.
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