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
- 2024
- Release Status
- Final
- Overall IR
- 5 - Water is impaired or threatened and a TMDL is needed.
- Trend
- Unknown
- Created
- 11/1/2023 8:12:43 AM
- Updated
- 12/14/2023 8:07:45 AM
| Cycle Added | Class | Cause | Data Source | Rationale |
|---|---|---|---|---|
| 2016 | Class A1 | pH | Ambient monitoring: Iowa DNR-rivers | New data: WQ improvement (chemical / physical / bacterial) |
| 2014 | Class BWW2 | pH | Ambient monitoring: Iowa DNR-rivers | New data: WQ improvement (chemical / physical / bacterial) |
The presumptive Class A1 use was assessed as “not supported” due to levels of indicator bacteria (E. coli) that exceeded state water quality criteria. The Class BWW2 use was assessed as “not supported” based on biological sampling data. 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 CY2014 & CY2021-2022 11960006 Yellow River near Castalia Site YeRi3 Iowa DNR 6 WQ CY2014 15960002 Yellow River at 107 Ave Iowa DNR 6 BIO See Below 156 Yellow River Site 1 – Most Upstream Site Iowa DNR 6 BIO See Below 1124 Yellow River Corner of 120 Ave and 111 Ave 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 Minimum Value Maximum Value Mean Value # Violations Violations needed for impairment Violates Significantly >10% Rule? Assessment Type Support Level 11960006 6 9 / 2 7.81 8.12 8 0 3 NO Mon 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 11960006 6 Dissolved Oxygen 9 / 2 8.43 12.61 10.1 0 NA / NA 3 NO Mon Full 11960006 6 pH 9 / 2 7.81 8.12 8 0 NA / NA 3 NO Mon Full 11960006 6 Temperature 9 / 2 6.091 21.484 15.344 0 NA / NA 3 NO Mon Full BioNet Site ID Date Drainage Area (mi2) Ecoregion Major Drainage BM Sample Gear BMIBI score BMIBI Class 52b BMIBI BIT BMIBI Pass/Fail 156 9/26/22 18.7 52b MS/WW Hess 55 Fair 61 Fail 1124 9/26/22 14.6 52b MS/WW Hess 60 Good 61 Fail BioNet Site ID Date Drainage Area (mi2) Ecoregion Major Drainage Riffle Stream? FIBI score FIBI Class 52b FIBI BIT FIBI Pass/Fail 156 9/26/22 18.7 52b MS/WW NA 58 Good 52 Pass 1124 9/27/22 14.6 52b MS/WW NA 59 Good 52 Pass Community Assessment Type Assessment Result Support Level IR Category Reason Benthic Macroinvertebrates Evaluated Fail (0/2) Not Fish Evaluated Pass (2/2) Full Assessment was evaluated because the samples included Overall Evaluated Fail Not 5bt in the assessment were collected in the same year.
Presumptive Class A1 - Indicator Bacteria: 2014
Presumptive Class A1 – pH:
Class BWW2 - Binomial Parameters:
Class BWW2 - Biological Sampling:
Benthic Macroinvertebrates:
Fish:
Overall: