Iowa DNR
Iowa DNR
ADBNet
Water Quality Assessments
Impaired Waters List

Don Williams Lake IA 04-UDM-1249

Boone County S5T84NR27W 5 mi. N of Ogden.

Assessment Cycle
2000
Result Period
1996 - 1998
Designations
Assessment Methodology
Assessment Type
Monitored
Integrated Report
Category 0
Trophic
Eutrophic
Trend
Degrading
Legacy ADBCode
IA 04-UDM-01650-L_0
Overall Use Support
Partial
Aquatic Life Use Support
Partial
Fish Consumption
Not assessed
Primary Contact Recreation
Threatened
Documentation
Assessment Comments

Assessment is based on (1) surveys of DNR Fisheries Bureau and (2) results of fish tissue (RAFT) monitoring in 1996.

Basis for Assessment

SUMMARY:  The Class A (primary contact recreation) uses were considered "not assessed."  Continue to assess support of the Class B(LW) aquatic life uses as "partially supported."  Fish consumption uses were assessed as fully supported.   EXPLANATION:  The Class A uses were considered "not assessed" due to a lack of information on levels of indicator bacteria for this lake.   The Class B(LW) uses remained assessed as "partially supported" based on the assessments developed for previous reports (see above).   The previous assessment of the Class B(LW) aquatic life uses ("partially supported") was reviewed and approved by the DNR Fisheries Bureau in 2000.   Fish consumption uses remain assessed as "fully supported" based on results of EPA/DNR fish tissue (RAFT) monitoring in 1996 (see assessment for the 1998 report above).   This lake is scheduled to be sampled as part of the ISU/DNR lake water quality monitoring project.

Monitoring and Methods
Assessment Key Dates
Methods
340 Primary producer surveys (phytoplankton/periphyton/macrophyton)
120 Surveys of fish and game biologists/other professionals
222 Non-fixed-station monitoring (conventional during key seasons and flows)
260 Fish tissue analysis
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