Iowa DNR
Iowa DNR
ADBNet
Water Quality Assessments
Impaired Waters List

Moorehead Park Pond IA 06-LSR-1587

Ida County S10T87NR39W 0.5 mi N of Ida Grove.

Cycle
2020
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
Stable
Created
8/27/2020 10:56:38 AM
Updated
10/13/2020 1:58:54 PM
Use Support
Class BLW
Aquatic Life - Lakes and wetlands
Fully Supported
Class HH
Human Health -
Not Assessed
General Use
General Use water -
Not Assessed
Impairment Delistings
No delistings for this assessment cycle.
Documentation
Assessment Summary

The Class BLW use is assessed as "fully supported." All other designated uses are “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 2014-2018

22470002

Moorehead Lake


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

22470002

6

Chlorophyll a TSI

15 / 5

36

70

54

NO

Monitored

Full

22470002

6

Secchi TSI

15 / 5

41

70

60

NO

Monitored

Full

22470002

6

Total Phosphorus TSI

15 / 5

49

69

62

NA

NA

NA

22470002

6

Inorganic suspended solids

15 / 5

0.3

6.7

1.1

NA

NA

NA


Class BLW - 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

22470002

6

Ammonia

15 / 5

0.315

0.03

0.01

0 / 0

0% / 0%

NO

Monitored

Full

22470002

6

Dissolved oxygen

15 / 5

15.7

10.1

10.4

NA / 1

NA / 7%

NO

Monitored

Full

22470002

6

pH

15 / 5

9.1

8.4

8.4

1 / NA

7% / NA

NO

Monitored

Full

22470002

6

Temperature

15 / 5

27.5

21.8

23.4

0 / 0

0% / 0%

NO

Monitored

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 Wet Mass = 75th Percentile

Assessment Type

Support Level

22470002

6

11

29.948

94.6 %

0.426

4 %

NO

Evaluated

NA


Class BLW - Protection of Submerged Aquatic Vegetation:

Site ID

Data Source ID

Parameter Name

# Samples / # Years

Minimum Value

Maximum Value

Median Value

Median Value >= SAV

Assessment Type

Support Level

22470002

6

Total suspended solids

15 / 5

0.4

16.1

7.6

NO

Monitored

Full


Class BLW - Fish Kill:

The Class BLW use that was assessed (evaluated) as "partially supporting" due to a fish kill in 2007 has been removed based on the assessment methodology. The 3b impairment is switched to 3a "not assessed" based on the age of the non-pollutant caused fish kill.


Class HH - No Data

Additional Notes:According to the DNR's Fisheries Bureau, the fish population lake was renovated in 2009.

Monitoring and Methods
Assessment Key Dates
5/19/2014
Fixed Monitoring Start Date
8/13/2018
Fixed Monitoring End Date
Methods
120
Surveys of fish and game biologists/other professionals
140
Incidence of spills and/or fish kills
222
Non-fixed-station monitoring (conventional during key seasons and flows)
340
Primary producer surveys (phytoplankton/periphyton/macrophyton)