Lower Pine Lake IA 02-IOW-758

Hardin County S4T87NR19W 0.5 mi E of Eldora.

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

Assessment Cycle

2000

Result Period

1996 - 1998

Designations

Assessment Methodology

2000 Methodology Document

Assessment Type

Evaluated

Integrated Report

Category 0

Trophic

Eutrophic

Trend

Improving

Legacy ADBCode

IA 02-IOW-0330-L_0

Overall Use Support

Partial

Aquatic Life Use Support

Partial

Fish Consumption

Not assessed

Primary Contact Recreation

Not assessed

Documentation

Assessment Comments

Assessment is based on results of surveys by IDNR Fisheries Bureau.

Basis for Assessment

SUMMARY: The Class A (primary contact recreation uses) were "not assessed." Continued to assess support of the Class B(LW) aquatic life uses as "partially supported." Other beneficial uses remain "not assessed." EXPLANATION: The level of support of the Class A (primary contact recreation) uses was changed from "partially supported" to "not assessed" due to (1) the lack of information on levels of indicator bacteria at this lake and (2) lack of recent information on algal populations at this lake. This change in assessment reflects a change in the DNR's Section 305(b) assessment methodology and does not reflect any known change in water quality. The previous (1998) assessment of support of the Class B(LW) uses ("partially supported") was reviewed and approved by the DNR Fisheries Bureau in 2000. Fish consumption uses remain "not assessed" due to the lack of fish contaminant monitoring at this lake.

Monitoring and Methods

Assessment Key Dates

Methods

120	Surveys of fish and game biologists/other professionals

Monitoring Levels

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

Causes and Sources of Impairment

Causes	Use Support	Cause Magnitude	Sources	Source Magnitude
Nutrients	Aquatic Life Support	Moderate	Source Unknown	Moderate
Nutrients	Primary Contact Recreation	Moderate	Source Unknown	Moderate
Organic enrichment/Low DO	Overall Use Support	Moderate	Agriculture Internal nutrient cycling (primarily lakes) Natural Sources	Moderate Moderate Slight
Organic enrichment/Low DO	Aquatic Life Support	Moderate	Agriculture Internal nutrient cycling (primarily lakes) Natural Sources	Moderate Moderate Slight
Algal Grwth/Chlorophyll a	Overall Use Support	Not Impairing	Internal nutrient cycling (primarily lakes)	Moderate
Algal Grwth/Chlorophyll a	Aquatic Life Support	Not Impairing	Internal nutrient cycling (primarily lakes)	Moderate
Algal Grwth/Chlorophyll a	Primary Contact Recreation	Not Impairing	Internal nutrient cycling (primarily lakes)	Moderate
Noxious aquatic plants	Primary Contact Recreation	Not Impairing	Source Unknown	Not Impairing
Suspended solids	Primary Contact Recreation	Not Impairing	Source Unknown	Not Impairing