Black Hawk Creek IA 02-CED-545
mouth (S22 T89N R13W Black Hawk Co.) to Hwy 58 in E 1/2 S27 T88N R14W Black Hawk Co.)
This is a Legacy Assessment. Prior to 2004, assessments were developed under a methodology that pre-dated the Integrated Report guidelines.
Assessment Cycle
1996
Result Period
1992 - 1994
Designations
Assessment Type
Monitored
Integrated Report
Category 0
Legacy ADBCode
IA 02-CED-0370_1
Overall Use Support
Partial
Aquatic Life Use Support
Threatened
Primary Contact Recreation
Partial
Documentation
Assessment Comments
Assessment is based on results of IDNR ambient monthly monitoring SW of Waterloo.
Basis for Assessment
Used results from the DNR quarterly monitoring stations near Waterloo to (1) assess support of the Class A (primary contact) uses as PS due to 3 of 4 samples exceeding the water quality criterion for fecal coliform bacteria and (2) assess support of the Class B(WW) aquatic life uses as FST due to absence of violations of any Class B(WW) water quality criteria in the 8 samples collected over a two-year period. High levels of fecal coliforms attributed primarily to agricultural nonpoint sources and secondarily to urban nonpoint sources and natural sources.
Monitoring and Methods
Assessment Key Dates
Methods
| 210 | Fixed station physical/chemical monitoring (conventional pollutants only) |
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 |
|---|---|---|---|---|
| Pathogens | Overall Use Support | High |
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| Pathogens | Primary Contact Recreation | High |
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