Mud Creek IA 06-BSR-1546
mouth (S26 T98N R46W Lyon Co.) to the IA-MN state line
- Cycle
- 2020
- Release Status
- Final
- Overall IR
- 5 - Water is impaired or threatened and a TMDL is needed.
- Trend
- Unknown
- Created
- 6/19/2020 7:16:09 AM
- Updated
- 10/15/2020 11:37:13 AM
The Class A1 use remains assessed as "partially supported" due to levels of indicator bacteria that violated state water quality criteria. The Class BWW2 use remains assessed as “partially supported” based on biological sampling data and also due to the occurrence of a fish kill.
Sources
of Data: Data Source Data Source ID Data Type Data Age Site ID Site Name Site Description Iowa DNR 6 WQ CY 2002-2003 11600003 Mud Creek nr IA/MN Border (4)
Iowa DNR 6 WQ CY 2002-2003 11600004 Mud Creek nr Doon (5)
Iowa DNR 6 BIO See Below 399 Mud Creek Lester – REMAP #136 Iowa DNR 6 BIO See Below 504 Mud Creek Alvord – REMAP #175 Class A1 - Indicator Bacteria: Site
ID Data
Source ID #
Samples / # Years 2002-2003
Geometric Mean Annual
Geometric Mean Violation #
Violations %
Violations Significantly
>10% Violations Assessment
Type Support
Level 11600003 6 18
/ 2 328 Yes 11 61% Yes Evaluated Partial 11600004 6 20
/ 2 839 Yes 14 70% Yes Evaluated Partial Class
BWW2 - Biological Sampling: 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 504 8/29/05 126 47a MO/WW Hess 26 Poor 54 Fail 399 7/21/04 80 47a MO/WW ArtSub 58 Good 54 Pass Fish: BioNet Site ID Date Drainage Area (mi2) Ecoregion Major Drainage/ Thermal Riffle Stream? FIBI score FIBI Class 47a FIBI BIT FIBI Pass/ Fail 504 8/29/05 126 47a MO/WW NA 13 Poor 43 Fail 399 7/21/04 80 47a MO/WW NA 20 Poor 43 Fail Overall: Community Assessment Type Assessment Result Support Level Earned IR Category Actual IR Category Reason Benthic
Macroinvertebrates Evaluated Fail (1/2) Partial Fish Evaluated Fail (0/2) Not Overall Evaluated Fail Partial 3bc 5bt Assessment
is evaluated because it was based on samples not collected in the last five
years. Class
BWW2 – Fish kill Assessment: The
Class BWW2 aquatic life use assessment based on the 2003 fish kill placed this segment in
Category 5b. 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.
Because the source of the pollutant was not identified and/or the enforcement
actions taken against the responsible party have not been resolved, the Class
BWW2 use was placed in Category 5b. Due to uncertainty regarding the recovery
of the aquatic life following the fish kill, any existing fish kill 5b
impairment will remain in Category 5b until more recent sampling has shown
recovery of the aquatic community or the responsible party has paid
restitution.
More
details about the 2003 fish kill can be found here:https://programs.iowadnr.gov/fishkill/Events/574