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 “partially supported” due to levels of indicator bacteria (E. coli) that exceeded state water quality criteria. The Class BWW1 use remains 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".
Sources
of Data: Data Source Data Source ID Data Type Data Age Site ID Site Name Site Description Iowa DNR 6 BIO See Below 107 Canoe Creek Canoe Creek SWMA - Decorah NEIARCD 19 WQ CY2012-2014 191910013 Canoe Creek Site 20 Class A1 - Indicator
Bacteria: 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 Partial Class A - pH: Site
ID Data
Source ID #
Samples / # Years Maximum
Value Mean
Value Median
Value #
Violations %
Violations Significantly
>10% Violations Assessment
Type Support
Level 191910013 19 14
/ 3 8.33 8.18 8.24 0 0% No Evaluated Full Class BWW1 - Conventional
Parameters: Site
ID Data
Source ID Parameter
Name #
Samples / # Years Maximum
Value Mean
Value Median
Value #
Acute / Chronic Violations %
Acute/ Chronic Violations Significantly
>10% Violations Assessment
Type Support
Level 191910013 19 Ammonia 14
/ 3 0.06 0.05 0.05 0
/ 0 0%
/ 0% No Evaluated Full 191910013 19 pH 14
/ 3 8.33 8.18 8.24 0
/ 0 0%
/ 0% No Evaluated Full 191910013 19 Temperature 14
/ 3 20 14.8 15 NA
/ 0 NA
/ 0% No Evaluated Full Class BWW1 - Biological
Sampling: Benthic Macroinvertebrates: BioNet
Site ID Date Drainage
Area (mi2) Ecoregion Major
Drainage/ Thermal BM
Sample Gear BMIBI
score BMIBI
Class 52b
BMIBI BIT BMIBI
Pass/ Fail 107 8/31/18 67 52b MS/WW Hess 78 Excellent 61 Pass 107 8/2/17 67 52b MS/WW Hess 70 Good 61 Pass 107 8/18/15 67 52b MS/WW Hess 78 Excellent 61 Pass Fish: BioNet
Site ID Date Drainage
Area (mi2) Ecoregion Major
Drainage/ Thermal Riffle
Stream? FIBI
score FIBI
Class 52b
FIBI BIT FIBI
Pass/ Fail 107 8/23/18 67 52b MS/WW NA 79 Excellent 52 Pass 107 8/2/17 67 52b MS/WW NA 87 Excellent 52 Pass 107 8/18/15 67 52b MS/WW NA 81 Excellent 52 Pass Overall: Community Assessment Type Assessment Result Support Level Earned IR Category Actual IR Category Reason Benthic Macroinvertebrates Monitored Pass (3/3) Full Fish Monitored Pass (3/3) Full Overall Monitored Pass Full 1 1 Assessment is monitored because the samples collected in the last five years were used to complete the assessment. Class
BWW1 - Trout Natural Reproduction: Even
though Canoe Creek is classified as a BWW1
stream, based on the January
2020 trout reproduction in Iowa streams summary prepared by the DNR Fisheries
Bureau, the Class BWW1 aquatic life use of Canoe Creek was assessed as
"fully supported". According to the updated summary, this stream was
placed in Category II: streams that exhibit recent but inconsistent
reproductive success and occasional stocking may be needed to maintain the
trout population. Class
HH - No Data