Bloody Run IA 01-YEL-433

mouth (Clayton Co.) to west line of S22 T95N R4W Clayton Co.

Assessment Cycle

2022

Release Status

Final

Data Collection Period

For purposes of developing stream/river water quality assessments for integrated reporting, three years of water quality data are typically used for both conventional pollutant parameters (e.g., indicator bacteria) and the less frequently monitored toxic parameters (e.g., toxic metals). Since the 2004 IR cycle, DNR has used a three-year data gathering period for streams, rivers, and beaches. For most assessments, the use of three years of data increases the number of samples upon which the decision on use support is based and helps address the problem of weather-related year-to-year fluctuations in water quality.

Due to the lower sampling frequency in Iowa’s ambient lake, biological, fish kill, and fish tissue monitoring programs, five years of data are used for developing IR assessments and for identifying Section 303(d) listings.

Data Type	Data Timeframe
Beach Sampling Data	CY 2018 - 2020
Stream/River Water Quality Data	CY 2018 - 2020
Lake Water Quality Data	CY 2016 - 2020
Biological Sampling Data	CY 2016 - 2020*
Fish Kill Data	CY 2016 - 2020
Fish Tissue Sampling Data	CY 2016 - 2020
Continuous Dissolved Oxygen Sampling Data	CY 2016 - 2020
*Biological sites sampled in both 2015 and 2019 were also assessed.

Overall IR Category: 5 - Water is impaired or threatened and a TMDL is needed.
Trend: Unknown

Created: 12/20/2021 8:43:43 AM
Updated: 1/13/2022 9:36:42 AM

Assessment conducted in accordance with Iowa's 2022 IR methodology

Use Support

Class A1

Recreation

Primary contact

Presumptive Use

Not Supported

Impairments

Support Level

Not Supported

Impairment Code

5p - Impairment occurs on a waterbody with a presumptive A1 or B(WW1) use.

Cause Magnitude

Slight

Status

Continuing

Source

Natural

Source Confidence

Moderate

Cycle Added

2010

Impairment Rationale

Geometric mean criterion exceeded

Data Source

Special project/study: Iowa DNR

TMDL Priority

Tier III

Class A2

Recreation

Secondary contact

Fully Supported

Class BCW1

Aquatic Life

Cold Water Type 1

WINOFI

Further Investigation Needed

Support Level

Water in Need of Further Investigation (WINOFI)

Impairment Code

3b - Use potentially impaired based on an evaluated assessment.

Cause Magnitude

Moderate

Status

New

Source

Spills/Dumping: Spills From Trucks or Trains

Source Confidence

High

Cycle Added

2022

Impairment Rationale

Pollutant-caused fish kill

Data Source

Fish kill investigation: Iowa DNR

Class HH

Human Health

Not Assessed

Impairment Delistings

No delistings for this assessment cycle.

Documentation

Assessment Summary

The presumptive Class A1 use was assessed as “not supported” based on levels of indicator bacteria (E. coli) that violated state water quality criteria. The Class A2 use was assessed as “fully supported” based on the same bacteria monitoring data. The Class BCW1 use was assessed (evaluated) as “WINOFI” based on the results of a fish kill investigation. 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	WQ	CY 2018-2020	10220003	Bloody Run Creek Site #1 (BR01)
Iowa DNR	6	BIO	See Below	1152	Bloody Run Creek	Hwy 18 bridge W of Marquette

Presumptive Class A1 - Indicator Bacteria:

Site ID

Data Source ID

# Samples per Year (2018/ 2019/2020)

2018 Geometric Mean

2019 Geometric Mean

2020 Geometric Mean

Violates Annual Geometric Mean?

# 2018 SSM violations / SSM Violations needed for impairment

# 2019 SSM violations / SSM Violations needed for impairment

# 2020 SSM violations / SSM Violations needed for impairment

Violates Annual SSM Significantly >10% Rule?

Assessment Type

Support Level

10220003

7/8/8

584

416

YES

4 / 3

2 / 3

YES

Monitored

Not

Class A2 - Indicator Bacteria:

Site ID

Data Source ID

# Samples per Year (2018/ 2019/2020)

2018 Geometric Mean

2019 Geometric Mean

2020 Geometric Mean

Violates Annual Geometric Mean?

# 2018 SSM violations / SSM Violations needed for impairment

# 2019 SSM violations / SSM Violations needed for impairment

# 2020 SSM violations / SSM Violations needed for impairment

Violates Annual SSM Significantly >10% Rule?

Assessment Type

Support Level

10220003

11/12/12

190

215

2 / 3

3 / 4

2 / 4

Monitored

Full

Class A - pH

Site ID	Data Source ID	# Samples / # Years	Minimum Value	Maximum Value	Mean Value	# Violations	Violations needed for impairment	Violates Significantly >10% Rule?	Assessment Type	Support Level
10220003	6	36 / 3	6.7	8.4	8.1	0	7	NO	Monitored	Full

Class BCW1 - Conventional Parameters:

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
10220003	6	Ammonia	36 / 3	0.02	0.05	0.03	NA	0 / 0	7	NO	Monitored	Full
10220003	6	Chloride	36 / 3	5.1	14	11.3	NA	0 / 0	7	NO	Monitored	Full
10220003	6	Dissolved Oxygen	36 / 3	9	15	12	0	NA / NA	7	NO	Monitored	Full
10220003	6	pH	36 / 3	6.7	8.4	8.1	0	NA / NA	7	NO	Monitored	Full
10220003	6	Sulfate	36 / 3	5.9	18	14.9	0	NA / NA	7	NO	Monitored	Full
10220003	6	Temperature	36 / 3	1.6	18	10.1	0	NA / NA	7	NO	Monitored	Full

Class BCW1 - Toxic Parameters:

Site ID	Data Source ID	Parameter Name	# Samples / # Years	Maximum Value	Mean Value	Median Value	# Acute / Chronic Violations	>1 Acute / Chronic Violation	Assessment Type	Support Level
10220003	6	Aluminum	14 / 3	2.3	0.4	0.1	0 / 0	NO	Monitored	Full
10220003	6	Arsenic	13 / 3	0.9	0.5	0.5	0 / 0	NO	Monitored	Full
10220003	6	Cadmium	13 / 3	0.19	0.04	0.02	0 / 0	NO	Monitored	Full
10220003	6	Chromium	13 / 3	2.5	1.5	1.4	0 / 0	NO	Monitored	Full
10220003	6	Lead	13 / 3	0.28	0.14	0.13	0 / 0	NO	Monitored	Full
10220003	6	Nickel	13 / 3	3.2	2.1	1.9	0 / 0	NO	Monitored	Full
10220003	6	Silver	13 / 3	0.025	0.025	0.025	0 / 0	NO	Monitored	Full
10220003	6	Zinc	13 / 3	2.6	1.4	1.4	0 / 0	NO	Monitored	Full

Class BCW1 - Biological Sampling:

Benthic Macroinvertebrates:

BioNet Site ID	Date	Drainage Area (mi2)	Ecoregion	Major Drainage	BM Sample Gear	CBI score	CBI Class	CBI BIT	CBI Pass/Fail
1152	8/28/17	35	52b	MS	Hess	55	NA	60	Pass

Overall:

Community	Assessment Type	Assessment Result	Support Level	IR Category	Reason
Benthic Macroinvertebrates	Evaluated	Pass (1/1)	Full		CBI score passed using the 8 point UAV that applies to single samples.
Overall	Evaluated	Pass	Full	1	Assessment was evaluated because it was based on a single sample.

Class BCW1 – Trout Natural Reproduction:

Based on the January 2021 trout reproduction in Iowa streams summary prepared by the DNR Fisheries Bureau, the Class BCW1 coldwater aquatic life use of Bloody Run Creek was assessed as "fully supported". According to the updated summary, this stream was placed in Category I: streams that exhibit consistent natural reproduction and maintain a wild population of one or more trout species without any stocking.

Class BCW1 – Fish kill Assessment:

The Class BCW1 aquatic life use assessment based on the 2020 fish kill placed this segment in Category 3b. This assessment was “evaluated” because there was a single fish kill on this segment in the last five years. Segments assessed using “evaluated” assessments are placed in Category 3b and are added to the state list of Waters In Need Of Further Investigation (WINOFI). If no additional fish kills are reported in this segment for a 10-year period (2030), the Category will be changed from 3b to 3a (not assessed).

Details about the 2020 fish kill can be found here: https://programs.iowadnr.gov/fishkill/Events/992

Class HH – No Data

Monitoring and Methods

Assessment Key Dates

1/3/2018

Fixed Monitoring Start Date

12/3/2020

Fixed Monitoring End Date

1/1/2021

Biological Monitoring

8/28/2017

Biological Monitoring

4/20/2020

Fish Kill

Methods

120

Surveys of fish and game biologists/other professionals

140

Incidence of spills and/or fish kills

230

Fixed station physical/chemical (conventional plus toxic pollutants)

315

Regional reference site approach

320

Benthic macroinvertebrate surveys

330

Fish surveys

420

Indicator bacteria monitoring