| |
| | Upper Rock River Basin Page (Site not responding. Last check: 2007-11-06) |
 | | The remainder of the Rock River mainstem, 62 miles, is in the Lower Rock River Basin, which extends from Fort Atkinson to the Wisconsin-Illinois border. |
 | | The primary water quality problems in impoundments the Upper Rock River Basin, excessive growth of algae, reduced dissolved oxygen levels, and poor water clarity (turbidity), are caused by agricultural and urban polluted runoff, which contribute thousands of tons of sediment and nutrients to surface waters annually. |
 | | Those three are the East Branch of the Rock River in Washington and Dodge counties, Upper Rock River watershed in Dodge and Fond du Lac counties, and Upper Crawfish River watershed in Columbia County. |
| www.dnr.state.wi.us /org/gmu/uprock (1351 words) |
|