Yellow River IA 01-YEL-437
from N. Fk. Yellow R. (S13 T96N R7W Allamakee Co.) to confluence with unnamed tributary in SE 1/4 S8 T96N R7W Winneshiek Co.
- Cycle
- 2022
- Release Status
- Final
- Overall IR
- 5 - Water is impaired or threatened and a TMDL is needed.
- Trend
- Unknown
- Created
- 12/20/2021 9:16:03 AM
- Updated
- 2/14/2022 2:10:35 PM
The presumptive Class A1 use was assessed as “not supported” due to levels of indicator bacteria (E. coli) that exceeded state water quality criteria and pH levels that exceeded the upper pH water quality criterion. The Class BWW2 use was assessed as “not supported” based on biological sampling data and also based on violations of the Class BWW2 criterion for pH. Note: A TMDL for the bacterial impairment for Yellow River basin streams was prepared by Iowa DNR in 2012 and was approved by U.S. EPA in February 2013. Due to TMDL completion, the Integrated Report category for the Class A1 recreational use was changed from 5p to 4a.
Data
Sources: Data Source Data Source ID Data Type Data Age Site ID Site Name Site Description Iowa DNR 6 WQ CY2011 &
CY2014 11960006 Yellow River near
Castalia Site YeRi3 Iowa DNR 6 WQ CY2011 &
CY2014 15960002 Yellow River at
107 Ave Iowa DNR 6 BIO See Below 568 Yellow River Postville – Site
YeRi1 Iowa DNR 6 BIO See Below 579 Yellow River Castalia – Site
YeRi3 Iowa DNR 6 BIO See Below 580 Yellow River Castalia – Site
YeRi4 Site ID Data Source ID # Samples / #
Years 2014 Geometric
Mean Annual Geometric
Mean Violation # Violations % Violations Significantly
>10% Violations Assessment Type Support Level 11960006 6 20 / 1 601 Yes 15 75% Yes Evaluated Not 15960002 6 20 / 1 1661 Yes 17 85% Yes Evaluated Not Site ID Data Source ID # Samples / #
Years Maximum Value Mean Value Median Value # Violations % Violations Significantly
>10% Violations Assessment Type Support Level 11960006 6 14 / 1 9.6 8.6 8.6 4 29% Yes Evaluated Not 15960002 6 14 / 1 9.2 8.43 8.45 1 7% No Evaluated Full 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 11960006 6 Ammonia 8 / 1 0.09 0.06 0.05 0 / 0 0% / 0% No Evaluated Full 11960006 6 Dissolved Oxygen 14 / 1 16 9 8.3 0 / 0 0% / 0% No Evaluated Full 11960006 6 pH 14 / 1 9.6 8.6 8.6 4 / 0 29% / 0% Yes Evaluated Not 11960006 6 Temperature 14 / 1 21.7 14.3 14.7 NA / 0 NA / 0% No Evaluated Full 15960002 6 Ammonia 8 / 1 016 0.08 0.05 0 / 0 0% / 0% No Evaluated Full 15960002 6 Dissolved Oxygen 14 / 1 15 8.4 7.5 0 / 0 0% / 0% No Evaluated Full 15960002 6 pH 14 / 1 9.2 8.43 8.45 1 / 0 7% / 0% No Evaluated Full 15960002 6 Temperature 14 / 1 23.6 14.7 15.4 NA / 0 NA / 0% No Evaluated Full Benthic
Macroinvertebrates: BioNet Site ID Date Drainage Area
(mi2) Ecoregion Major Drainage BM Sample Gear BMIBI score BMIBI Class 52b BMIBI BIT BMIBI Pass/ Fail 568 7/25/07 20 52b MS/WW Hess 70 Good 61 Pass 568 8/1/06 20 52b MS/WW Hess 74 Good 61 Pass Fish: BioNet Site ID Date Drainage Area
(mi2) Ecoregion Major Drainage Riffle Stream? FIBI score FIBI Class 52b FIBI BIT FIBI Pass/ Fail 580 7/26/07 10 52b MS/WW NA 58 Good 52 Pass 568 7/25/07 20 52b MS/WW NA 48 Fair 52 Fail 579 7/25/07 13 52b MS/WW NA 49 Fair 52 Fail 568 8/1/06 20 52b MS/WW NA 46 Fair 52 Fail Community Assessment Type Assessment Result Support Level IR Category Reason Benthic
Macroinvertebrates Evaluated Pass (2/2) Full Fish Evaluated Fail (1/4) Not Overall Evaluated Fail Not 5bt Assessment was
evaluated because the samples included in the assessment weren’t collected in
the last five years.
Presumptive Class A1 - Indicator Bacteria:
Class A - pH:
Class BWW2 - Conventional Parameters:
Class BWW2 - Biological Sampling:
Overall: