Ada Hayden Heritage Park Lake IA 03-SSK-3104

North Ames (T84N R24W Sec24 Story County)

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 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.

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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.
Trophic: Eutrophic
Trend: Unknown
Created: 1/5/2022 11:00:54 AM
Updated: 1/12/2022 1:20:47 PM

Use Support

Class A1

Presumptive Use

Recreation - Primary contact

Not Assessed

Class BLW

Aquatic Life - Lakes and wetlands

Not Assessed

Class HH

Human Health -

Fully Supported

General Use

General Use water -

Not Assessed

Impairment Delistings

No delistings for this assessment cycle.

Documentation

Assessment Summary

The Class HH (fish consumption) use was assessed (monitored) as "fully supported" based on fish tissue 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	WQ	CY 2018-2020	14000235	Ada Hayden Lake
Iowa DNR	6	FT	See Below	380	Ada Hayden Lake	North Ames

Class A1 - 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
14000235	6	8 / 3	8.2	8.8	8.4	0	NA	NO	Evaluated	Full

Class A1 - Lake TSI's:

Site ID	Data Source ID	Parameter Name	# Samples / # Years	Minimum Value	Maximum Value	Median Value	Median TSI Violation?	Assessment Type	Support Level
14000235	6	Chlorophyll a TSI	8 / 3	32	53	44	NO	Evaluated	Full
14000235	6	Secchi TSI	8 / 3	41	70	52	NO	Evaluated	Full
14000235	6	Total Phosphorus TSI	8 / 3	45	67	53	NA	NA	NA
14000235	6	Inorganic suspended solids	8 / 3	1.2	20	2.2	NA	NA	NA

Class BLW - 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

14000235

Ammonia

8 / 3

0.0003

0.205

0.04

0 / 0

Evaluated

Full

14000235

Dissolved Oxygen

7 / 3

8.3

11.9

10.1

NA / NA

Evaluated

Full

14000235

8 / 3

8.2

8.8

8.4

NA / NA

Evaluated

Full

14000235

Temperature

8 / 3

15.2

29.7

24.3

NA / NA

Evaluated

Full

Class BLW - Lake Planktonic Cyanobacteria:

Site ID	Data Source ID	# Samples	Maximum Cyanobacteria Wet Mass	Maximum Cyanobacteria % Composition	Median Cyanobacteria Wet Mass	Median Cyanobacteria % Composition	Median Cyanobacteria Concentration = 75th Percentile	Assessment Type	Support Level
14000235	6	2	4.47	49.4%	4.44	42.4%	NO	Evaluated	NA

Class HH - Fish Tissue Sampling:

Site ID	Biopart	Year	Species	# in sample / # of samples	Avg Length (cm)	(Avg) Hg (ppm)	Chlordane (ppm)	Sum PCBs (ppm)
380	tissue plug	2019	largemouth bass	10	34.7	0.135
380	tissue plug	2019	largemouth bass	5	37.2	0.146
Support Level	Full

Monitoring and Methods

Assessment Key Dates

6/19/2018

Fixed Monitoring Start Date

7/6/2020

Fixed Monitoring End Date

7/1/2019

Fish Tissue Monitoring

Methods

222

Non-fixed-station monitoring (conventional during key seasons and flows)

260

Fish tissue analysis