Traffic authorities seeking to extend a road across the Little Cahaba River in southern Jefferson County promised Tuesday to make it a controlled access road and prevent adjacent development in the watershed that protects metropolitan Birmingham’s drinking water supply.

But clean-water advocates poured into a public meeting Tuesday night to insist the risk of contaminating the river even from road and bridge construction outweighs the convenience of connecting Cahaba Beach Road to Sicard Hollow Road. Multiple environmental organizations are urging residents to lobby the state to drop the project.

The project would create a more direct route from U.S. 280 to future Liberty Park development and Grants Mill Road for an estimated 10,000 vehicles a day by 2025. But is not intended to reduce traffic on commuter-congested 280, according to DeJarvis Leonard, Birmingham region engineer, Alabama Department of Transportation. Read more.