By 24/7 News Service.
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An 84-mile long river that starts west of Columbus and makes its way southeastward to the Scioto River near Circleville has been named one of the most endangered in the country.
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The environmental advocacy group *American Rivers* says Big Darby Creek is threatened by urban sprawl, the uncontrolled expansion of urban areas.
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In 2006 the *Big Darby Accord* was created to help clean up the Darby watershed. And while that arrangement helped, the environmental group says sprawl is still threatening its survival.