Spring Lake IA 04-RAC-1152

Greene County S25T84NR30W 3 mi NW of Grand Junction.

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

Monitored

Integrated Report

Category 0

Legacy ADBCode

IA 04-RAC-00805-L_0

Overall Use Support

Partial

Aquatic Life Use Support

Partial

Fish Consumption

Not assessed

Primary Contact Recreation

Not assessed

Documentation

Assessment Comments

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 the lack of information on levels of indicator bacteria 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

7/25/2001	Fixed Monitoring End Date
6/23/2000	Fixed Monitoring Start Date

Methods

340	Primary producer surveys (phytoplankton/periphyton/macrophyton)
120	Surveys of fish and game biologists/other professionals
220	Non-fixed station physical/chemical monitoring (conventional pollutant only)

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

Causes and Sources of Impairment

Causes	Use Support	Cause Magnitude	Sources	Source Magnitude
Noxious aquatic plants	Overall Use Support	Moderate	Agriculture Natural Sources	Not Impairing Moderate
Noxious aquatic plants	Aquatic Life Support	Moderate	Agriculture Natural Sources	Not Impairing Moderate
Noxious aquatic plants	Primary Contact Recreation	Moderate	Agriculture Natural Sources	Not Impairing Moderate
Nutrients	Primary Contact Recreation	Moderate	Internal nutrient cycling (primarily lakes) Sediment resuspension	Moderate Moderate
Suspended solids	Overall Use Support	Moderate	Sediment resuspension	Moderate
Suspended solids	Primary Contact Recreation	Moderate	Sediment resuspension	Moderate
Turbidity	Overall Use Support	Moderate	Sediment resuspension	Moderate
Turbidity	Primary Contact Recreation	Moderate	Sediment resuspension	Moderate