Turkey River IA 01-TRK-156
from confluence with N. Br. Turkey R. (S31 T99N R11W Howard Co.) to confluence with S. Br. Turkey R. in S2 T98N R12W Howard Co.
- Assessment Cycle
- 2020
- Release Status
- Final
- Data Collection Period
- Overall IR Category
- 5 - Water is impaired or threatened and a TMDL is needed.
- Trend
- Unknown
- Created
- 8/14/2020 2:42:05 PM
- Updated
- 10/15/2020 7:19:32 AM
Assessment Summary
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 BWW2 use was assessed as "fully supported" based on biological sampling data.
Assessment Explanation
Sources of Data: Data Source Data Source ID Data Type Data Age Site ID Site Name Site Description Iowa DNR 6 WQ CY 2012-2014 15450015 Turkey River @ V46 TR90 Iowa DNR 6 BIO See Below 1022 Turkey River US confluence with North Fork Turkey – TK008 Presumptive 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 15450015 6 23 / 3 284 606 163 Yes 14 61% Yes Evaluated Partial Presumptive Class
A1 - pH: Site ID Data Source ID # Samples / # Years Maximum Value Mean Value Median Value # Violations % Violations Significantly >10% Violations Assessment Type Support Level 15450015 6 24/ 3 8.7 8 8 0 0% No Evaluated Full Class BWW2 -
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 15450014 6 Ammonia 16 / 2 0.44 0.09 0.05 0 / 0 0% / 0% No Evaluated Full 15450014 6 Chloride 17 / 3 41 31.9 33 0 / 0 0% / 0% No Evaluated Full 15450014 6 Dissolved oxygen 24 / 3 11 7 7.5 NA / 2 NA / 8% No Evaluated Full 15450014 6 pH 24 / 3 8.7 8 8 0 / NA 0% / NA No Evaluated Full 15450014 6 Temperature 24 / 3 28 14.7 14.5 0 / 0 0% / 0% No Evaluated Full Class
BWW2 - Biological Sampling: Fish: BioNet Site ID Date Drainage Area (mi2) Ecoregion Major Drainage/Thermal Riffle Stream? FIBI score FIBI Class 47c FIBI BIT FIBI Pass/ Fail 1022 7/31/18 28 47c MS/WW Und. 63 Good 44 Pass 1022 8/7/17 28 47c MS/WW Und. 64 Good 44 Pass 1022 8/16/16 28 47c MS/WW Und. 71 Excellent 44 Pass 1022 8/25/15 28 47c MS/WW Und. 62 Good 44 Pass 1022 8/5/14 28 47c MS/WW Und. 73 Excellent 44 Pass Overall Assessment: Community Assessment Type Assessment Result Support Level Earned IR Category Actual IR Category Reason Fish Monitored Pass (5/5) Full 1 1 Assessment
is monitored because there were two or more samples collected in the previous
five years.
Assessment Key Dates
| 4/4/2012 | Non-fixed Monitoring Start Date |
| 11/5/2014 | Non-fixed Monitoring End Date |
| 8/25/2015 | Biological Monitoring |
| 8/16/2016 | Biological Monitoring |
| 8/5/2014 | Biological Monitoring |
| 8/7/2017 | Biological Monitoring |
| 7/31/2018 | Biological Monitoring |
Methods
| 150 | Monitoring data more than 5 years old |
| 220 | Non-fixed station physical/chemical monitoring (conventional pollutant only) |
| 315 | Regional reference site approach |
| 330 | Fish surveys |
| 420 | Indicator bacteria monitoring |