April 2007. Members of the Capital Area Senior Environment Corps Art Sconing, Velda Kauffman, Carl Crone and Harvey Baney explain how they count marcoinvertebrets to help determine the stream's overall ability to support aquatic life. They take the counts in the Yellow Breeches at the New Cumberland Borough Park in Cumberland County. The same crew shows how they do water quality testing on a different stretch of the Yellow Breeches.

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