Problem with shortcode

GREAT widget! Will def donate if we an solve below:

When I use the short code of: [river id=’03270500′]

I am getting the following error:
Warning: extract() [function.extract]: First argument should be an array in /home/content/00/5887100/html/adventure/wordpress/wp-content/plugins/usgs-river-data/river_shortcode.php on line 34

http://wordpress.org/extend/plugins/usgs-river-data/