Iowa DNR
ADBNet

Water Quality Assessments

Impaired Waters List

Frog Hollow (aka Volga Lake) IA 01-VOL-292

Fayette County S3T93NR8W 4 mi. NNE of Fayette.

Assessment Cycle
2000
Result Period
1996 - 1998
Designations
Assessment Type
Evaluated
Integrated Report
Category 0
Trophic
Eutrophic
Trend
Stable
Legacy ADBCode
IA 01-VOL-00130-L_0
Overall Use Support
Threatened
Aquatic Life Use Support
Threatened
Fish Consumption
Not assessed
Primary Contact Recreation
Not assessed
Documentation
Assessment Comments

Assessment is based on 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 "fully supported / threatened."  Other beneficial uses remain "not assessed."  EXPLANATION:  The level of support of the Class A (primary contact recreation) uses was changed from "fully supported/threatened" 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 ("fully supported / threatened") 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.

Causes and Sources of Impairment
Causes Use Support Cause Magnitude Sources Source Magnitude
Siltation Overall Use Support Not Impairing
  • Agriculture
  • Not Impairing
Siltation Aquatic Life Support Not Impairing
  • Agriculture
  • Not Impairing