Shell Rock River IA 02-SHL-783

from south corporate limit of Shell Rock (S12 T91N R15W Butler Co.) to confluence with Flood Cr. in S27 T93N R16W Butler Co.

This is a Legacy Assessment. Prior to 2004, assessments were developed under a methodology that pre-dated the Integrated Report guidelines.

Assessment Cycle

1998

Result Period

1994 - 1996

Designations

Assessment Type

Monitored

Integrated Report

Category 0

Legacy ADBCode

IA 02-SHL-0010_2

Overall Use Support

Threatened

Aquatic Life Use Support

Threatened

Fish Consumption

Fully

Documentation

Assessment Comments

Basis for Assessment

Continued to assess support of the Class B(WW) aquatic life uses as FST based on (1) 1994 WQ studies related to development of hydropower at the Greene milldam that showed adequate levels of dissolved oxygen in the impoundment and in the river downstream from the dam and (2) assessment developed for the 1996 report. In addition, the March/April 1998 Iowa Conservationist identifies the reach from Shell Rock to Greene as having "excellent numbers of 12 to 17-inch" smallmouth bass.