Saunders Branch IA 03-SKU-902
mouth (SW 1/4 S17 T71N R6W Henry Co.) to headwaters
This is a Legacy Assessment. Prior to 2004, assessments were developed under a methodology that pre-dated the Integrated Report guidelines.
Assessment Cycle
2002
Result Period
1998 - 2000
Designations
Assessment Methodology
Assessment Type
Monitored
Integrated Report
Category 0
Legacy ADBCode
IA 03-SKU-0085_0
Overall Use Support
Not supporting
Aquatic Life Use Support
Not supporting
Documentation
Assessment Comments
1998 Biocriteria: Fish IBI (4 sites upstream to downstream) = 6(very poor), 5(very poor), 34(fair), 18(poor)
Basis for Assessment
The assessment was based on the 1998 biological assessment data (see 2000 assessment comments), and the aquatic life use support continued to be assessed as not supporting (=NS), based on a comparison of the F-IBI and BM-IBI scores with biological assessment criteria established specifically for the 2002 Section 305(b) report. The biological assessment criteria were determined from a statistical analysis of data collected at stream ecoregion reference sites from 1994-2001.
Monitoring and Methods
Assessment Key Dates
| 10/13/1998 | Biological Monitoring |
Methods
| 320 | Benthic macroinvertebrate surveys |
| 330 | Fish surveys |
| 380 | Quan. measurements of instream parms-- channel morphology-- floodplain-- 1-2 seasons-- by prof |
| 220 | Non-fixed station physical/chemical monitoring (conventional pollutant only) |
| 315 | Regional reference site approach |
Monitoring Levels
| Biological | 3 |
| Habitat | 4 |
| Physical Chemistry | 1 |
| Toxic | 0 |
| Pathogen Indicators | 0 |
| Other Health Indicators | 0 |
| Other Aquatic Life Indicators | 0 |
| # of Bio Sites | 4 |
| BioIntegrity | Poor |
Causes and Sources of Impairment
| Causes | Use Support | Cause Magnitude | Sources | Source Magnitude |
|---|---|---|---|---|
| Priority organics | Overall Use Support | High |
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| Priority organics | Aquatic Life Support | High |
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| Unionized Ammonia | Overall Use Support | High |
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| Unionized Ammonia | Aquatic Life Support | High |
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| Organic enrichment/Low DO | Overall Use Support | Moderate |
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| Organic enrichment/Low DO | Aquatic Life Support | Moderate |
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