Lizard Creek IA 04-UDM-1278

mouth to confluence with unnamed tributary in N 1/2 S31 T90N R30W Webster Co.

Open Data Collection Period Modal

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 2016 - 2018
Stream/River Water Quality Data	CY 2016 - 2018
Lake Water Quality Data	CY 2014 - 2018
Biological Sampling Data	CY 2014 - 2018*
Fish Kill Data	CY 2014 - 2018
Fish Tissue Sampling Data	CY 2014 - 2018
Continuous Dissolved Oxygen Sampling Data	CY 2014 - 2018
*Biological sites sampled in both 2013 and 2017 were also assessed.

Open Segment Map
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Cycle: 2020
Release Status: Final
Overall IR: 5 - Water is impaired or threatened and a TMDL is needed.
Trend: Unknown
Created: 9/16/2020 6:52:57 AM
Updated: 10/12/2020 1:53:35 PM

Use Support

Class A1

Recreation - Primary contact

Partially Supported

Bacteria: Indicator Bacteria- E. coli

Support Level

Partially Supported

Impairment Code

5a - Pollutant-caused impairment. TMDL needed.

Cause Magnitude

Slight

Status

Continuing

Source

Unknown: Source Unknown

Source Confidence

N/A

Cycle Added

2008

Impairment Rationale

Geometric mean criterion exceeded

Data Source

Ambient monitoring: Iowa DNR-rivers

TMDL Priority

Tier III

Class BWW1

Aquatic Life - Warm Water Type 1

WINOFI

Biological: loss of native mussel species

Support Level

Further Investigation Needed

Impairment Code

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

Cause Magnitude

Moderate

Status

Continuing

Source

Unknown: Source Unknown

Source Confidence

Low

Cycle Added

2004

Impairment Rationale

Loss of >50% of native mussel species

Data Source

Special project/study

Class HH

Human Health -

Not Assessed

General Use

General Use water -

Not Assessed

Impairment Delistings

Cycle Added	Class	Cause	Data Source	Rationale
2006	Class BWW1	Biological: low aquatic macroinvertebrate IBI	Biological monitoring: Iowa DNR WQMA	New data: recovery of fish/invertebrate community

Documentation

Assessment Summary

The Class A1 use remains assessed as "partially supported" due to levels of indicator bacteria (E. coli) that violated state water quality criteria. The Class BWW1 use remains assessed as "partially supported" based on information from the 1998-99 statewide survey of Iowa's freshwater mussels (Arbuckle et al. 2000). The historic Class BWW1 aquatic life use 5b impairment for low benthic macroinvertebrate IBI scores was de-listed this cycle based on a monitored biological assessment of "full support". All other designated uses were "not assessed".

Assessment Explanation

Sources of Data:

Data Source	Data Source ID	Data Type	Data Age	Site ID	Site Name	Site Description
Iowa DNR	6	WQ	CY 2012-2014	10940001	Lizard Creek near Fort Dodge (US2)
Iowa DNR	6	BIO	See Below	66	Lizard Creek	Clare
Iowa DNR	6	BIO	See Below	925	Lizard Creek	Fort Dodge – US2

Class A1 - Indicator Bacteria:

Site ID	Data Source ID	# Samples / # Years	2012 Geometric Mean	2013 Geometric Mean	2014 Geometric Mean	Annual Geometric Mean Violation	# Violations	% Violations	Significantly >10% Violations	Assessment Type	Support Level
10940001	6	23 / 3	59	154	414	Yes	7	30%	Yes	Evaluated	Partial

Class A - pH:

Site ID	Data Source ID	# Samples / # Years	Maximum Value	Mean Value	Median Value	# Violations	% Violations	Significantly >10% Violations	Assessment Type	Support Level
10940001	6	33 / 3	8.7	8.2	8.3	0	0%	No	Evaluated	Full

Class BWW1 - Conventional Parameters:

Site ID	Data Source ID	Parameter Name	# Samples / # Years	Maximum Value	Mean Value	Median Value	# Acute / Chronic Violations	% Acute/ Chronic Violations	Significantly >10% Violations	Assessment Type	Support Level
10940001	6	Ammonia	33 / 3	1.4	0.15	0.05	0 / 0	0% / 0%	No	Evaluated	Full
10940001	6	Chloride	33 / 3	120	54	48	0 / 0	0% / 0%	No	Evaluated	Full
10940001	6	Dissolved oxygen	33 / 3	15	11.4	11.4	NA / 0	NA / 0%	No	Evaluated	Full
10940001	6	pH	33 / 3	8.7	8.2	8.3	0 / NA	0% / NA	No	Evaluated	Full
10940001	6	Sulfate	33 / 3	200	89	88	0 / NA	0% / NA	No	Evaluated	Full
10940001	6	Temperature	33 / 3	27	11.3	10.6	0 / 0	0% / 0%	No	Evaluated	Full

Class BWW1 - Biological Sampling:

Benthic Macroinvertebrates:

BioNet Site ID	Date	Drainage Area (mi2)	Ecoregion	Major Drainage/Thermal	BM Sample Gear	BMIBI score	BMIBI Class	47b BMIBI BIT	BMIBI Pass/ Fail
66	8/19/19	252	47b	MS/WW	Hess	74	Good	62	Pass
66	8/11/15	252	47b	MS/WW	Hess	63	Good	62	Pass
925	9/29/14	436	47b	MS/WW	ArtSub	53	Fair	62	Fail

Fish:

BioNet Site ID	Date	Drainage Area (mi2)	Ecoregion	Major Drainage/Thermal	Riffle Stream?	FIBI score	FIBI Class	47b FIBI BIT	FIBI Pass/ Fail
66	8/19/19	252	47b	MS/WW	Yes	72	Excellent	53	Pass
66	8/11/15	252	47b	MS/WW	Yes	69	Good	53	Pass

Overall:

Community	Assessment Type	Assessment Result	Support Level	Earned IR Category	Actual IR Category	Reason
Benthic Macroinvertebrates	Monitored	Pass (2/3)	Full
Fish	Monitored	Pass (2/2)	Full
Overall	Monitored	Pass	Full	1	1	Assessment is monitored because all samples were collected in the last five years.

Class BWW1 – Freshwater Mussel Sampling:

Freshwater Mussel Survey	Avg. # Freshwater Mussel Species	Avg. # Freshwater Mussel Species Increase/Decrease	Avg % Freshwater Mussel Species Increase/Decrease	Assessment Type	Support Level	IR Category
1984-85 (Frest 1987) 4 sites	~1.5
1998-99 (Arbuckleet al. 2000) 4 sites	~0	~2	-50%	Evaluated	Partial	3b
IR 303(d)-level assessment decisions are developed only for segments having an average of four or more species reported in the 1984-85 (Frest) survey due to the difficulty of interpreting status of mussel communities showing relatively low species richness during the both the historical (1984-85) and current (1998-99) surveys. This information can be used, however, to indicate the potential for an impairment of the aquatic life uses and to indicate the need to conduct additional sampling. Based on these results, the aquatic life uses are assessed (evaluated) as “partially supported." See 2004 IR assessment for more information.

Class HH – No Data

Monitoring and Methods

Assessment Key Dates

1/9/2012

Fixed Monitoring Start Date

9/10/2014

Fixed Monitoring End Date

8/19/2019

Biological Monitoring

9/29/2014

Biological Monitoring

8/11/2015

Biological Monitoring

Methods

220

Non-fixed station physical/chemical monitoring (conventional pollutant only)

315

Regional reference site approach

320

Benthic macroinvertebrate surveys

330

Fish surveys

420

Indicator bacteria monitoring