Turkey River IA 01-TRK-148
mouth (Clayton Co.) to confluence with Volga R. in S26 T92N R4W Clayton 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 1:55:20 PM
- Updated
- 10/14/2020 10:08:30 AM
Assessment Summary
The Class A1 use was 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 "partially supported" based on biological sampling data. The Class HH use remains assessed as "partially supported" based on fish tissue sampling data and the issuance of a consumption advisory in 2013.
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 2016-2018 10220001 Turkey River near Garber
USGS 11 WQ CY 2018-2018 5412500 Turkey River at Garber, IA
Iowa DNR 6 BIO See Below 840 Turkey River Garber Iowa DNR 6 BIO See Below 390 Turkey River Garber – REMAP #70 Iowa DNR 6 BIO See Below 1060 Turkey River Osterdock – TK002 Iowa DNR 6 FT See Below 125 Turkey River S of Garber Class A1 -
Indicator Bacteria: Site ID Data Source ID # Samples / # Years 2016 Geometric Mean 2017 Geometric Mean 2018 Geometric Mean Annual Geometric Mean Violation # Violations % Violations Significantly >10% Violations Assessment Type Support Level 10220001 6 18 / 3 508.65 200.3 992.4 Yes 11 61% Yes Monitored 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 10220001 6 36 / 3 8.4 8.1 8.1 0 0% No Monitored Full 5412500 11 8 / 1 8.2 7.8 7.9 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 10220001 6 Ammonia 36 / 3 0.35 0.04 0.02 0 / 0 0% / 0% No Monitored Full 10220001 6 Chloride 36 / 3 22 16.6 17 0 / 0 0% / 0% No Monitored Full 10220001 6 Dissolved oxygen 36 / 3 14.4 10.7 10.1 NA / 0 NA / 0% No Monitored Full 5412500 11 Dissolved oxygen 8 / 1 14.4 9.5 9.1 NA / 0 NA / 0% No Evaluated Full 10220001 6 pH 36 / 3 8.4 8.1 8.1 0 / NA 0% / NA No Monitored Full 5412500 11 pH 8 / 1 8.2 7.8 7.9 0 / NA 0% / NA No Evaluated Full 10220001 6 Sulfate 36 / 3 26 19.7 20 0 / NA 0% / NA No Monitored Full 10220001 6 Temperature 36 / 3 23.2 11.4 12.1 0 / 0 0% / 0% No Monitored Full 5412500 11 Temperature 8 / 1 21.1 16.1 17.5 0 / 0 0% / 0% No Evaluated Full Class BWW1 -
Toxic Parameters: Site ID Data Source ID Parameter Name # Samples / # Years Maximum Value Mean Value Median Value # Acute / Chronic Violations % Acute/ Chronic Violations >1 Acute / Chronic Violation Assessment Type Support Level 10220001 6 Aluminum 9 / 2 6.7 1.978 0.89 0 / 0 0% / 0% No Evaluated Full 10220001 6 Arsenic 9 / 2 1 0.65 0.64 0 / 0 0% / 0% No Evaluated Full 10220001 6 Cadmium 9 / 2 0.025 0.025 0.025 0 / 0 0% / 0% No Evaluated Full 10220001 6 Chromium 9 / 2 1.4 0.94 0.98 0 / 0 0% / 0% No Evaluated Full 10220001 6 Copper 9 / 2 1.2 0.7 0.6 0 / 0 0% / 0% No Evaluated Full 10220001 6 Lead 9 / 2 0.31 0.088 0.05 0 / 0 0% / 0% No Evaluated Full 10220001 6 Nickel 9 / 2 2.3 2 2 0 / 0 0% / 0% No Evaluated Full 10220001 6 Selenium 9 / 2 1.4 0.76 0.76 0 / 0 0% / 0% No Evaluated Full 10220001 6 Zinc 9 / 2 7 2.5 1.5 0 / 0 0% / 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 840 9/21/17 1553 52b MS/WW Float ArtSub 70 Good 61 Pass 840 10/7/14 1553 52b MS/WW Float ArtSub 65 Good 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 390 10/3/03 1553 52b MS/WW NA 75 Excellent 52 Pass 1060 7/26/02 1606 52b MS/WW NA 39 Fair 52 Fail Overall
Assessment: Community Assessment
Type Assessment
Result Support
Level Earned
IR Category Actual
IR Category Reason Benthic
Macroinvertebrates Monitored Pass (2/2) Full Fish Evaluated Fail (1/2) Partial Overall Evaluated Fail Partial 3bu 3bu Assessment
is evaluated because the drainage areas of all the sites were larger than the
calibrated range. Class HH – Fish
Tissue Sampling: Site ID Date Species Name Biopart # in sample Hg result Hg violation (>0.3)? Assessment Type Support Level 125 8/14/12 smallmouth bass plug 5 0.467 Yes Evaluated Partial 125 9/22/11 smallmouth bass plug 5 0.376 Yes Evaluated Partial Class HH-F -
Toxic Parameters: Site ID Data Source ID Parameter Name # Samples / # Years Maximum Value Mean Value Median Value Number of Non - Detects Mean Value > Criterion or MCL Assessment Type Support Level 10220001 6 Cadmium 9 / 2 0.025 0.025 0.025 9 No All Non-Detect Full 10220001 6 Chromium 9 / 2 1.4 0.94 0.98 0 No Evaluated Full 10220001 6 Copper 9 / 2 1.2 0.7 0.6 0 No Evaluated Full 10220001 6 Nickel 9 / 2 2.3 2 2 0 No Evaluated Full 10220001 6 Selenium 9 / 2 1.4 0.76 0.76 2 No Evaluated Full 10220001 6 Zinc 9 / 2 7 2.5 1.5 0 No Evaluated Full
Assessment Key Dates
| 7/26/2002 | Biological Monitoring |
| 10/3/2003 | Biological Monitoring |
| 9/22/2011 | Fish Tissue Monitoring |
| 8/14/2012 | Fish Tissue Monitoring |
| 1/11/2016 | Fixed Monitoring Start Date |
| 12/5/2018 | Fixed Monitoring End Date |
| 9/21/2017 | Biological Monitoring |
| 10/7/2014 | Biological Monitoring |
Methods
| 150 | Monitoring data more than 5 years old |
| 220 | Non-fixed station physical/chemical monitoring (conventional pollutant only) |
| 240 | Non-fixed station physical/chemical (conventional + toxicants) |
| 260 | Fish tissue analysis |
| 315 | Regional reference site approach |
| 320 | Benthic macroinvertebrate surveys |
| 330 | Fish surveys |
| 420 | Indicator bacteria monitoring |