Rock Creek Lake IA 03-NSK-865

Jasper County S17T80NR17W 4 mi. ENE of Kellogg.

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 03-NSK-00340-L_0

Overall Use Support

Partial

Aquatic Life Use Support

Partial

Fish Consumption

Not assessed

Primary Contact Recreation

Partial

Drinking Water

Not assessed

Documentation

Assessment Comments

Assessment is based on water quality monitoring and information from the DNR Fisheries Bureau.

Basis for Assessment

This lake was added to Iowa's 1998 list of Section 303(d) waters at the recommendation of the DNR Fisheries Bureau, with the primary water quality impairments due to siltation and nutrients from nonpoint sources. The water quality problems at this lake are currently being evaluated by limnologists at Iowa State University. This lake and its watershed are also being used as a pilot study for development of total maximum daily loads (TMDLs) for nonpoint pollutants. The Rock Creek Watershed Improvement Project, sponsored by the Jasper County Soil & Water Conservation District, was intiated in January 1998. For more information on this project, call 515/792-4116.

Monitoring and Methods

Assessment Key Dates

Methods

340	Primary producer surveys (phytoplankton/periphyton/macrophyton)
420	Water column surveys (e.g. fecal coliform)
120	Surveys of fish and game biologists/other professionals
240	Non-fixed station physical/chemical (conventional + toxicants)

Monitoring Levels

Biological	0
Habitat	0
Physical Chemistry	3
Toxic	0
Pathogen Indicators	0
Other Health Indicators	0
Other Aquatic Life Indicators	0
# of Bio Sites	0
BioIntegrity	N/A