Hewitt Creek IA 01-NMQ-109
mouth (S29/30 T89N R2W Dubuque Co.) to confluence with Hickory Cr. in S21 T89N R2W Dubuque Co.
- Assessment Cycle
- 2022
- Release Status
- Final
- Data Collection Period
- Overall IR Category
- 4 - Water is impaired or threatened and a TMDL has been completed or is not needed.
- Trend
- Unknown
- Created
- 1/10/2022 10:38:06 AM
- Updated
- 1/28/2022 10:45:51 AM
Assessment Summary
The Class BWW2 use was assessed as “not supported” based on a fish kill investigation. All other designated uses were "not assessed."
Assessment Explanation
Presumptive Class A1 - No Data Class BWW2 - Fish kill Assessment: The Class BWW2 aquatic life use assessment based on the 2017 fish kill placed this segment in Category 4d. The fish kill was caused by a “pollutant” or was suspected to be caused by a “pollutant”; therefore, the Class BWW2 use was considered impaired. However, because restitution for the fish killed was received, the Class BWW2 use was placed in Category 4d (impaired but TMDL not required). DNR feels that (1) TMDLs should not be required for a fish kill caused by a one-time illegal or unauthorized release of a pollutant where enforcement action was taken and (2) enforcement action is more appropriate and effective for addressing a spill-related impairment than the TMDL process. Details about the 2017 fish kill can be found here:https://programs.iowadnr.gov/fishkill/Events/940
Assessment Key Dates
| 10/9/2017 | Fish Kill |
Methods
| 120 | Surveys of fish and game biologists/other professionals |
| 140 | Incidence of spills and/or fish kills |