Cloie Branch IA 01-TRK-134
mouth (S5 T89N R2E Dubuque Co.) to west line of S5 T89N R2E Dubuque 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 8:12:30 AM
- Updated
- 2/1/2024 10:11:59 AM
| Cycle Added | Class | Cause | Data Source | Rationale |
|---|---|---|---|---|
| 2016 | Class BCW1 | Organic Enrichment: Low Dissolved Oxygen | Ambient monitoring: Iowa DNR-rivers | New data: WQ improvement (chemical / physical / bacterial) |
The presumptive Class A1 and Class A2 uses were assessed as "fully supported" based on pH monitoring data. The Class BCW1 use was assessed as "not supported" based on biological sampling data, grab sample temperature data, and continuous temperature monitoring data. The Class BCW1 dissolved oxygen (DO) impairment based on continuous DO monitoring data was delisted this cycle based on DO grab sample monitoring data. All other designated uses were "not assessed." DNR is unsure that this segment should be designated as a coldwater stream. If this segment was assessed as a warm water stream segment, there would be no violations of the temperature and DO water quality criteria. Additionally, the biological assessment of warm water aquatic life use would also indicate "full support."
DNR is unsure that this segment should be designated
as a coldwater stream. If this segment was assessed as a warm water stream
segment, there would be no violations of the temperature and DO water quality
criteria. Additionally, the biological assessment of the warm water aquatic life use would
also indicate "full support."
Data Sources: Data Source Data Source ID Data Type Data Age Site ID Site Name Site Description Iowa DNR 6 WQ CY 2021-2022 12310006 Cloie Branch-Durango
Iowa DNR 6 BIO See Below 836 Cloie Branch Durango (REMAP #389) Presumptive Class A1 and Class A2 – pH: 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 12310006 6 11 / 2 7.32 8.37 7.85 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 12310006 6 Dissolved Oxygen 11 / 2 6.7 12.4 10.1 1 NA / NA 3 NO Mon Full 12310006 6 pH 11 / 2 7.32 8.37 7.85 0 NA / NA 3 NO Mon Full 12310006 6 Temperature 11 / 2 7.193 25.206 18.516 6 NA / NA 3 YES Mon Not Benthic Macroinvertebrates: BioNet Site ID Date Drainage Area (mi2) Ecoregion Major Drainage/Thermal BM Sample Gear CBI score CBI Class CBI BIT CBI Pass/Fail 836 7/13/21 5.6 52b MS/CW Hess 24 NA 60 Fail 836 9/6/14 5.6 52b MS/CW Hess 34 NA 60 Fail 836 8/5/14 5.6 52b MS/CW Hess 31 NA 60 Fail Community Assessment Type Assessment Result Support Level IR Category Reason Benthic Macroinvertebrates Evaluated Fail (0/3) Not 5bv Assessment was evaluated because not all of the
samples used to complete the assessment were collected in the last five years. 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 836 7/13/21 5.6 52b MS/CW Hess 68 Good 61 Pass 836 9/6/14 5.6 52b MS/CW Hess 66 Good 61 Pass 836 8/5/14 5.6 52b MS/CW Hess 51 Fair 61 Fail BioNet Site ID Date Drainage Area (mi2) Ecoregion Major Drainage/ Thermal Riffle Stream? FIBI score FIBI Class 52b FIBI BIT FIBI Pass/Fail 836 7/13/21 5.6 52b MS/CW NA 73 Excellent 52 Pass 836 9/6/14 5.6 52b MS/CW NA 76 Excellent 52 Pass Community Assessment Type Assessment Result Support Level IR Category Reason Benthic Macroinvertebrates Evaluated Pass (2/3) Full
Fish Evaluated Pass (2/2) Full 1 Assessment was evaluated because not all of the
samples used to Overall Evaluated Pass Full complete the assessment were collected in
the last five years.
Continuous monitoring data collected in 2013 and 2014 for the
DNR/SHL coldwater stream sampling project were examined for stream temperature
criteria violations. The maximum stream temperature recorded during the sensor
deployment period was 30.9 degrees (C). The BCW1 temperature criterion of 20
(C) was exceeded in 121 of 126 days. The percentage exceeding (96%) was greater
than the 10% impairment threshold with high statistical confidence (>90%).
Based on these data, the BCW1 use was assessed as impaired due to temperature. Class HH - No Data
Presumptive Class A1 - Indicator Bacteria: No Data
Class BCW1 - Binomial Parameters:
Class BCW1 - Biological Sampling:
Overall Assessment:
(Theoretical Assessment) Class BWW1 - Biological Sampling:
Fish:
Overall:
Class BCW1 - Continuous Monitoring Data: