Middle River IA 04-LDM-1083
mouth (Warren Co.) to confluence with Clanton Cr. in S28 T76N R25W Warren Co.
- Assessment Cycle
- 2024
- Release Status
- Pending
- Data Collection Period
- Overall IR Category
- 5 - Water is impaired or threatened and a TMDL is needed.
- Trend
- Unknown
- Created
- 11/1/2023 8:12:59 AM
- Updated
- 12/18/2023 1:03:54 PM
Assessment Summary
The Class A1 use was assessed as "not supported" due to levels of indicator bacteria (E.. coli) that violated state water quality criteria. The Class BWW1 use was assessed as "not supported" based on biological sampling data. The Class HH use was assessed as "fully supported" based on water quality monitoring data.
Assessment Explanation
Data Sources: Data Source Data Source ID Data Type Data Age Site ID Site
Name Site
Description Iowa DNR 6 WQ CY 2020-2022 10910001 Middle
River near Indianola
Iowa DNR 6 BIO See Below 292 Middle
River Indianola
(REMAP #239) Iowa DNR 6 BIO See Below 927 Middle
River Indianola Site ID Data Source ID # Samples per Year (2020/ 2021/2022) 2020 Geometric Mean 2021 Geometric Mean 2022 Geometric Mean Violates Annual Geometric Mean? # 2020 SSM violations / SSM Violations needed for impairment # 2021 SSM violations / SSM Violations needed for impairment # 2022 SSM violations / SSM Violations needed for impairment Violates Annual SSM Significantly >10% Rule? Assessment Type Support Level 10910001 6 8/8/8 460 307 814 YES 4 / 3 5 / 3 7 / 3 YES Mon 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 10910001 6 35 / 3 7 8.3 7.9 0 7 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 10910001 6 Chloride 36 / 3 9.4 30 17.2 NA 0 / 0 7 NO Mon Full 10910001 6 Dissolved Oxygen 36 / 3 7.2 15.2 10.3 0 NA / NA 7 NO Mon Full 10910001 6 pH 35 / 3 7 8.3 7.9 0 NA / NA 7 NO Mon Full 10910001 6 Sulfate 36 / 3 17 53 27 0 NA / NA 7 NO Mon Full 10910001 6 Temperature 36 / 3 0 27.8 12.2 0 NA / NA 7 NO Mon Full Site ID Data Source ID Parameter Name # Samples / # Years Maximum Value Mean Value Median Value # Acute / Chronic Violations >1 Acute / Chronic Violation Assessment Type Support Level 10910001 6 Ammonia 35 / 3 0.27 0.04 0.02 0 / 0 NO Mon Full 10910001 6 Cadmium 20 / 3 0.5 0.5 0.5 0 / 0 NO Mon Full 10910001 6 Chromium 20 / 3 1 0.47 0.5 0 / 0 NO Mon Full 10910001 6 Lead 20 / 3 1 0.91 1 0 / 0 NO Mon Full 10910001 6 Nickel 20 / 3 3.8 2.1 2 0 / 0 NO Mon Full 10910001 6 Selenium 18 / 2 2 0.8 0.5 0 / 0 NO Mon Full 10910001 6 Silver 20 / 3 1 0.902 1 0 / 0 NO Mon Full 10910001 6 Zinc 20 / 3 3.3 0.9 0.5 0 / 0 NO Mon Full Site ID Date Drainage Area (mi2) Ecoregion Major Drainage BM Sample Gear BMIBI score BMIBI Class 47f BMIBI BIT BMIBI Pass/Fail 927 7/21/21 497.0 47f MS Floating Art Sub 75 Good 51 Pass 927 8/10/17 497.0 47f MS Floating Art Sub 31 Fair 51 Fail Site ID Date Drainage Area (mi2) Ecoregion Major Drainage Riffle Stream? FIBI score FIBI Class 47f FIBI BIT FIBI Pass/Fail 292 9/16/02 502 47f MS NA 38 Fair 36 Pass 292 7/17/02 502 47f MS NA 21 Poor 36 Fail Overall: Community Assessment Type Assessment Result Support Level IR Category Reason Benthic
Macroinvertebrates Evaluated Fail (1/2) Not Fish Evaluated Fail (1/2) Not Assessment was evaluated because it included
samples not collected in Overall Evaluated Fail Not 5bt the last five years. 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 10910001 6 Selenium 18 / 2 2 0.8 0.5 11 NO Mon Full
Class A1 - Indicator Bacteria:
Class A1 – pH:
Class BWW1 - Binomial Parameters:
Class BWW1 - Toxic Parameters:
Class BWW1 - Biological Sampling:
Benthic Macroinvertebrates:
Fish:
Class HH – Toxic Parameters:
Assessment Key Dates
12/5/2022 | Monitoring End |
1/7/2020 | Monitoring Start |
7/17/2002 | Biological Monitoring |
9/16/2002 | Biological Monitoring |
8/10/2017 | Biological Monitoring |
7/21/2021 | Biological Monitoring |
Methods
150 | Monitoring data more than 5 years old |
200 | Physical/Chemical Monitoring |
315 | Regional reference site approach |
320 | Benthic macroinvertebrate surveys |
330 | Fish surveys |
420 | Indicator bacteria monitoring |