Canoe Creek IA 01-UIA-260
mouth (S25 T99N R7W Winneshiek Co.) to county road W38 (S23 T99N R8W Winneshiek Co.).
The presumptive Class A1 use remains assessed as “not supported” due to levels of indicator bacteria (E. coli) that exceeded state water quality criteria. The Class BWW1 use was assessed as “fully supported” based on biological sampling data, water quality monitoring data, and on the trout reproduction in Iowa streams summary prepared by the DNR Fisheries Bureau. All other designated uses were "not assessed."
Data Sources: Data Source Data Source ID Data Type Data Age Site ID Site
Name Site
Description Iowa DNR 6 WQ CY 2022-2024 12960001 Canoe
Creek-Canoe Creek SWMA - Decorah
NEIARCD 19 WQ CY 2012-2014 191910013 Canoe
Creek Site
20 Iowa DNR 6 BIO See Below 107 Canoe
Creek Canoe
Creek SWMA - Decorah Site ID Data Source ID # Samples / # Years 2012 Geometric Mean 2013 Geometric Mean 2014 Geometric Mean Annual Geometric Mean Violation # Violations % Violations Significantly >10% Violations Assessment Type Support Level 191910013 19 21 / 3 346 207 389 Yes 13 62% Yes EVALUATED NOT Site ID Data Source ID # Samples / # Years Minimum Value Maximum Value Mean Value # Violations Violations needed for impairment Violates Significantly >10% Rule? Assessment Type Support Level 12960001 6 15 / 3 7.8 8.3 8 0 4 NO MONITORED FULL Site ID Data Source ID Parameter Name # Samples / # Years Minimum Value Maximum Value Mean Value # Violations # Acute / Chronic Violations Violations needed for impairment Violates Significantly >10% Rule? Assessment Type Support Level 12960001 6 Chloride 15 / 3 10 14 12 NA 0 / 0 4 NO MONITORED FULL 12960001 6 Dissolved Oxygen 15 / 3 7.9 11.5 9.8 0 NA / NA 4 NO MONITORED FULL 12960001 6 pH 15 / 3 7.8 8.3 8 0 NA / NA 4 NO MONITORED FULL 12960001 6 Sulfate 15 / 3 13 18 15 0 NA / NA 4 NO MONITORED FULL 12960001 6 Temperature 15 / 3 11.5 20.1 17 0 NA / NA 4 NO MONITORED FULL Site ID Data Source ID Parameter Name # Samples / # Years Maximum Value Mean Value Median Value # Acute / Chronic Violations >1 Acute / Chronic Violation Assessment Type Support Level 12960001 6 Ammonia 15 / 3 0.09 0.03 0.02 0 / 0 NO MONITORED FULL Benthic
Macroinvertebrates: Site ID Date Drainage Area (mi2) Ecoregion Major Drainage BM Sample Gear BMIBI score BMIBI Class 52b BMIBI BIT BMIBI Pass/Fail 107 10/2/24 66.6 52b MS Hess 67 Good 61 Pass 107 9/3/24 66.6 52b MS Hess 84 Excellent 61 Pass 107 7/23/24 66.6 52b MS Hess 59 Good 61 Fail 107 8/8/23 66.6 52b MS Hess 70 Good 61 Pass 107 9/7/22 66.6 52b MS Hess 76 Excellent 61 Pass 107 7/27/21 66.6 52b MS Hess 62 Good 61 Pass 107 8/18/20 66.6 52b MS Hess 85 Excellent 61 Pass Site ID Date Drainage Area (mi2) Ecoregion Major Drainage Riffle Stream? FIBI score FIBI Class 52b FIBI BIT FIBI Pass/Fail 107 9/4/24 66.6 52b MS NA 84 Excellent 52 Pass 107 8/8/23 66.6 52b MS NA 75 Excellent 52 Pass 107 9/7/22 66.6 52b MS NA 91 Excellent 52 Pass 107 7/27/21 66.6 52b MS NA 82 Excellent 52 Pass 107 8/18/20 66.6 52b MS NA 86 Excellent 52 Pass Community Assessment Type Assessment Result Support Level IR Category Reason Benthic
Macroinvertebrates Monitored Pass (6/7) Full Fish Monitored Pass (5/5) Full 1 Assessment was
monitored because the assessment used multiple Overall Monitored Pass Full samples collected in
a recent five-year period to complete the assessment.
Aquatic Life Use - Trout Natural Reproduction
Based on the latest trout reproduction in Iowa streams summary prepared by the DNR Fisheries Bureau, the aquatic life use was assessed as "fully supported." According to the summary, a portion, or all, of this assessment unit was placed in Category I: streams that exhibit consistent natural reproduction and maintain a wild population of one or more trout species without any stocking.
Presumptive Class A1 - Indicator Bacteria: 2012-2014
Presumptive Class A1 - pH:
Class HH - No Data
Class BWW1 - Binomial Parameters:
Class BWW1 - Toxic Parameters:
Class BWW1 -
Biological Sampling:
Fish:
Overall: