Mill Creek IA 06-LSR-1615
mouth (S14 T92N R40W Cherokee Co.) to confluence with Whisky Cr. at east line S29 T94N R41W O'Brien Co.
- Cycle
- 2026
- Current Phase
- Public Comment
- Overall IR
- 5 - Water is impaired or threatened and a TMDL is needed.
- Trend
- Stable
- Created
- 10/27/2025 3:11:50 PM
- Updated
- 12/1/2025 9:51:31 AM
The Class BWW2 use was assessed as “not supported” based on biological sampling data. All other designated uses were "not assessed."
Data Sources: Data Source Data Source ID Data Type Data Age Site ID Site Name Site Description Iowa DNR 6 BIO & WQ See Below 142 Mill Creek NE of Meriden (REMAP#436) Iowa DNR 6 BIO See Below 1203 Mill Creek Larrabee Benthic Macroinvertebrates: BioNet Site ID Date Drainage Area (mi2) Ecoregion Major Drainage/ Thermal BM Sample Gear BMIBI score BMIBI Class 47a BMIBI BIT BMIBI Pass/Fail 142 9/4/24 259.0 47a MO/WW Surber 48 Fair 54 Fail 142 9/14/23 259.0 47a MO/WW Surber 43 Fair 54 Fail 142 7/27/21 259.0 47a MO/WW Surber 44 Fair 54 Fail BioNet Site ID Date Drainage Area (mi2) Ecoregion Major Drainage/ Thermal Riffle Stream? FIBI score FIBI Class 47a FIBI BIT FIBI Pass/Fail 142 7/27/21 259.0 47a MO/WW NA 38 Fair 43 Fail 1203 9/17/19 267.0 47a MO/WW NA 28 Fair 43 Fail Community Assessment Type Assessment Result Support Level IR Category Reason Benthic Macroinvertebrates Monitored Fail (0/3) Not Fish Monitored Fail (0/2) Not Assessment was
monitored because the samples used to complete Overall Monitored Fail Not 5bv the assessment were
collected in a recent five-year period. Site ID Data Source ID # Days Monitoring (2016) DO Criteria Type # 2016 violations/Violations needed for impairment Violates Annual Significantly >10% Rule? Assessment Type Support Level 24 hr 0/15 No 142 6 98 16 hr 0/15 No Evaluated Full
Presumptive Class A1 - No Data
Class BWW2 - Biological Sampling:
Fish:
Overall:
Class BWW2- Continuous DO Monitoring: