Fourmile Creek IA 04-LDM-1112
mouth (S16 T78N R23W Polk Co.) to county road bridge (First Street Ankeny) in S18 T80N R23W PolkCo.
- Cycle
- 2026
- Current Phase
- Public Comment
- Overall IR
- 2 - Some of the designated uses are met but there is insufficient data to determine if remaining designated uses are met.
- Trend
- Stable
- Created
- 10/27/2025 3:09:04 PM
- Updated
- 1/13/2026 11:13:57 AM
The Class BWW2 use was assessed as "fully supported" based on biological sampling data and water quality monitoring 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 See Below 1242 Fourmile
Creek Berwick PCCB 29 WQ CY 2022-2024 99990217 Four
Mile Creek
PCCB 29 WQ CY 2022-2024 99990224 Four
Mile Creek
PCCB 29 WQ CY 2022-2024 99990292 Four
Mile Creek
PCCB 29 WQ CY 2022-2024 99990234 Four
Mile Creek
PCCB 29 WQ CY 2022-2024 99990241 Four
Mile Creek
PCCB 29 WQ CY 2022-2024 99990242 Four
Mile Creek
PCCB 29 WQ CY 2022-2024 99990257 Four
Mile Creek
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 99990217 29 Chloride 6 / 2 11.39 74.92 48.77 NA 0 / 0 3 NO EVALUATED FULL 99990224 29 Chloride 5 / 3 44.19 83.48 59.7 NA 0 / 0 2 NO EVALUATED FULL 99990292 29 Chloride 6 / 3 15 70.8 44 NA 0 / 0 3 NO EVALUATED FULL 99990217 29 Sulfate 6 / 2 11.07 47.43 31.09 0 NA / NA 3 NO EVALUATED FULL 99990224 29 Sulfate 5 / 3 27.89 51.77 37.46 0 NA / NA 2 NO EVALUATED FULL 99990292 29 Sulfate 6 / 3 11.72 50.94 30.56 0 NA / NA 3 NO EVALUATED FULL 99990217 29 Temperature 52 / 3 0 31.11 14.44 0 NA / NA 9 NO MONITORED FULL 99990224 29 Temperature 62 / 3 0 31.67 15.57 0 NA / NA 10 NO MONITORED FULL 99990234 29 Temperature 48 / 3 -1.11 29.44 14.01 0 NA / NA 9 NO MONITORED FULL 99990241 29 Temperature 41 / 3 -1.11 26.67 13.33 0 NA / NA 8 NO MONITORED FULL 99990242 29 Temperature 46 / 3 -1.11 27.78 13.35 0 NA / NA 8 NO MONITORED FULL 99990257 29 Temperature 59 / 3 0 26.67 14.92 0 NA / NA 10 NO MONITORED FULL 99990292 29 Temperature 5 / 3 15 22.78 19 0 NA / NA 2 NO EVALUATED FULL Site ID Date Drainage Area (mi2) Ecoregion Major Drainage BM Sample Gear BMIBI score BMIBI Class 47b BMIBI BIT BMIBI Pass/Fail 1242 9/6/19 70.5 47b MS Surber 54 Fair 62 Pass* Site ID Date Drainage Area (mi2) Ecoregion Major Drainage Riffle Stream? FIBI score FIBI Class 47b FIBI BIT FIBI Pass/Fail 1242 9/6/19 70.5 47b MS Yes 58 Good 53 Pass Community Assessment Type Assessment Result Support Level IR Category Reason Benthic
Macroinvertebrates Evaluated Pass (1/1) Full *The BMIBI score
passed after using the 8 point UAV applied to single samples. Fish Evaluated Pass (1/1) Full 1
Overall Evaluated Pass Full Assessment was evaluated because it was
based on a single sample.
Class A1 - No Data
Class BWW2 - Binomial Parameters:
Class BWW2 - Biological Sampling:
Benthic Macroinvertebrates:
Fish:
Overall: