Iowa DNR
Iowa DNR
ADBNet
Water Quality Assessments
Impaired Waters List

Mud Creek IA 03-SSK-946

mouth (SW 1/4 S24 T81N R21W Jasper Co.) to headwaters in NW1/4 S15 T82N R21W Story Co.

Cycle
2022
Release Status
Final
Overall IR
2 - Some of the designated uses are met but there is insufficient data to determine if remaining designated uses are met.
Trend
Unknown
Created
12/22/2021 1:56:09 PM
Updated
12/22/2021 1:59:03 PM
Use Support
Class A1
Recreation - Primary contact
Not Assessed
Class BWW1
Aquatic Life - Warm Water Type 1
Fully Supported
Impairment Delistings
No delistings for this assessment cycle.
Documentation
Assessment Summary

The presumptive Class BWW1 use was assessed as “fully supported” based on biological sampling data. All other designated uses were "not assessed."

Assessment Explanation

Data Sources:

Data Source

Data Source ID

Data Type

Data Age

Site ID

Site Name

Site Description

Iowa DNR

6

BIO

See Below

140

Mud Creek

Baxter


Presumptive Class A1 - No Data

Presumptive Class BWW1 - Biological Sampling:

Benthic Macroinvertebrates:

BioNet Site ID

Date

Drainage Area (mi2)

Ecoregion

Major Drainage/Thermal

BM Sample Gear

BMIBI score

BMIBI Class

47f BMIBI BIT

BMIBI Pass/ Fail

140

10/8/15

8

47f

MS/WW

ArtSub

60

Good

51

Pass

140

9/14/04

8

47f

MS/WW

ArtSub

49

Fair

51

Fail

140

9/18/98

8

47f

MS/WW

ArtSub

55

Fair

51

Pass


Fish:

BioNet Site ID

Date

Drainage Area (mi2)

Ecoregion

Major Drainage/Thermal

Riffle Stream?

FIBI score

FIBI Class

47f FIBI BIT

FIBI Pass/ Fail

140

10/8/15

8

47f

MS/WW

NA

38

Fair

36

Pass

140

9/4/04

8

47f

MS/WW

NA

41

Fair

36

Pass

140

10/12/98

8

47f

MS/WW

NA

35

Fair

36

Fail


Overall:

Community

Assessment Type

Assessment Result

Support Level

IR Category

Reason

Benthic Macroinvertebrates

Evaluated

Pass (2/3)

Full

Fish

Evaluated

Pass (2/3)

Full

Overall

Evaluated

Pass

Full

1

Assessment was evaluated because it included samples not collected in the last five years and the drainage area of the sample site is smaller than the calibrated range.

Monitoring and Methods
Assessment Key Dates
10/12/1998
Biological Monitoring
9/4/2004
Biological Monitoring
10/8/2015
Biological Monitoring
Methods
150
Monitoring data more than 5 years old
315
Regional reference site approach
320
Benthic macroinvertebrate surveys
330
Fish surveys