Boyer River IA 06-BOY-1511
from confluence with unnamed tributary approximately 5 miles south of Early (S 1/2 S33 T88N R37W Sac Co.) to confluence with unnamed tributary approximately 4 miles NE of Schaller in SE 1/4 SW 1/5 S5 T89N R37W Sac 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 06-BOY-0030_3
Overall Use Support
Threatened
Aquatic Life Use Support
Threatened
Documentation
Assessment Comments
Assessment is based on results of an October 1995 DNR stream use assessment.
Basis for Assessment
Used results of two DNR stream use assessments to assess support of the Class B(LR) aquatic life uses as FST due to (1) presence of a meandered stream channel, (2) existence of a relatively diverse fish community (16 species from 7 families) for western Iowa streams. Continued support of the aquatic life uses is threatened by excessive siltation from agricultural activities in the watershed.
Monitoring and Methods
Assessment Key Dates
| 10/1/1995 | DNR Stream Use Assessment |
Methods
| 330 | Fish surveys |
| 375 | Visual observation-- may not quantify some parameters-- single season-- by prof. |
Monitoring Levels
| Biological | 3 |
| Habitat | 3 |
| 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 |
|---|---|---|---|---|
| Other habitat alterations | Overall Use Support | Not Impairing |
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| Other habitat alterations | Aquatic Life Support | Not Impairing |
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