Iowa DNR
BioNet
River & Stream Biological Monitoring
Fish and Benthic Macroinvertebrate Surveys
Physical Habitat Assessments

Burr Oak Creek Osage - 385th ST and Primrose Ave

Analysis Summary for Series #2795

Benthic Macroinvertebrate Index of Biotic Integrity (BMIBI)

Metric Name Value Score
MH Sensitive Taxa 5 5.56
SH Dom FFG % 53.06 7.42
MH Total CW Taxa 0 0
MH Tricop No Hydrop 3 4.64
MH Tolerant % 23.33 4.81
SH CW % 0 0
SH Hydropsyche % 3.82 7.43
SH Hydropsychinae % 20.22 6.95
BTI 4.92 5.23
*Mouse-over metric for full name
**Final IBI is sum of scores multiplied by 1.1111

Analysis Factors

Factor Value
BMIBI Type Cold Water
Sample Date 7/16/2024
Sampling Series Series #2795
Drainage Area (mi2) 20.7
Log(DA) 0
Calculation Last Updated 7/22/2025 3:36:45 PM
Sampling Gear Hess
BMIBI Score
47
Cold Water
Not Assigned

BMIBI Score Explained

This site was analyzed using the BMIBI-Cold Water assessment methodology.

A detailed analysis of the IBI score has not yet been determined for coldwater IBI metrics.

This location has been classified as a survey site. Survey sites are compared to reference sites within the same ecoregion. A reference site represents natural stream qualities that are least disturbed by human activities within the watershed. Reference sites are grouped by ecoregion to establish a benchmark against which these survey streams are compared.

EcoRegion Comparison

Scores for a sampling session are compared against reference sites within the same ecoregion:

There are not enough sampling sessions collected at reference sites in this ecoregion to generate a meaningful comparison.