Yellow River IA 01-YEL-434
mouth (S34 T96N R3W Allamakee Co.) to County Road X-26 bridge in S24 T96N R5W Allamakee Co.
- Assessment Cycle
- 2022
- Release Status
- Final
- Data Collection Period
- Overall IR Category
- 4 - Water is impaired or threatened and a TMDL has been completed or is not needed.
- Trend
- Unknown
- Created
- 12/22/2021 5:39:22 AM
- Updated
- 12/22/2021 5:41:20 AM
The Class A1 use was assessed as "not supported" due to levels of indicator bacteria (E. coli) that exceeded state water quality criteria. The Class BWW1 use was assessed as "fully supported" based on biological sampling data, water quality monitoring data, and on the trout reproduction in Iowa streams summary prepared by the DNR Fisheries Bureau. All other designated uses were "not assessed." Note: A TMDL for the bacterial impairment for Yellow River basin streams was prepared by Iowa DNR in 2012 and approved by U.S. EPA in 2013. Due to the TMDL completion, the Integrated Report category for the Class A1 primary contact recreation use was changed from 5a to 4a.
Data Sources:
|
Data Source |
Data Source ID |
Data Type |
Data Age |
Site ID |
Site Name |
Site Description |
|
Iowa DNR |
6 |
WQ |
CY 2018-2020 |
10030002 |
Yellow River near Volney |
|
|
Iowa DNR |
6 |
BIO |
See Below |
141 |
Yellow River |
Yellow River State Forest – Yellow River Unit - Ion |
|
Iowa DNR |
6 |
BIO |
See Below |
1149 |
Yellow River |
County Road X36 bridge – 3 miles S of Hwy 76 - Ion |
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 |
|
10030002 |
6 |
6/7/8 |
592 |
450 |
358 |
YES |
5 / NA |
5 / 3 |
3 / 3 |
YES |
Monitored |
Not |
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 |
|
10030002 |
6 |
36 / 3 |
6.6 |
8.4 |
8.2 |
0 |
7 |
NO |
Monitored |
Full |
Class BWW1 - 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 |
|
10030002 |
6 |
Ammonia |
36 / 3 |
0.02 |
0.09 |
0.03 |
NA |
0 / 0 |
7 |
NO |
Monitored |
Full |
|
10030002 |
6 |
Chloride |
36 / 3 |
9.9 |
26 |
17.7 |
NA |
0 / 0 |
7 |
NO |
Monitored |
Full |
|
10030002 |
6 |
Dissolved Oxygen |
36 / 3 |
8.8 |
14.4 |
11.5 |
0 |
NA / NA |
7 |
NO |
Monitored |
Full |
|
10030002 |
6 |
pH |
36 / 3 |
6.6 |
8.4 |
8.2 |
0 |
NA / NA |
7 |
NO |
Monitored |
Full |
|
10030002 |
6 |
Sulfate |
36 / 3 |
8.9 |
19 |
14.4 |
0 |
NA / NA |
7 |
NO |
Monitored |
Full |
|
10030002 |
6 |
Temperature |
36 / 3 |
0.4 |
20.5 |
10.3 |
0 |
NA / NA |
7 |
NO |
Monitored |
Full |
Class BWW1 - 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 |
|
10030002 |
6 |
Aluminum |
14 / 3 |
4.8 |
0.7 |
0.2 |
0 / 0 |
NO |
Monitored |
Full |
|
10030002 |
6 |
Arsenic |
13 / 3 |
0.86 |
0.61 |
0.63 |
0 / 0 |
NO |
Monitored |
Full |
|
10030002 |
6 |
Cadmium |
13 / 3 |
0.06 |
0.03 |
0.02 |
0 / 0 |
NO |
Monitored |
Full |
|
10030002 |
6 |
Chromium |
13 / 3 |
2.2 |
1.3 |
1.2 |
0 / 0 |
NO |
Monitored |
Full |
|
10030002 |
6 |
Lead |
13 / 3 |
0.65 |
0.17 |
0.12 |
0 / 0 |
NO |
Monitored |
Full |
|
10030002 |
6 |
Nickel |
13 / 3 |
3.7 |
2.6 |
2.5 |
0 / 0 |
NO |
Monitored |
Full |
|
10030002 |
6 |
Silver |
13 / 3 |
0.025 |
0.025 |
0.025 |
0 / 0 |
NO |
Monitored |
Full |
|
10030002 |
6 |
Zinc |
13 / 3 |
2.7 |
1.5 |
1.3 |
0 / 0 |
NO |
Monitored |
Full |
Class BWW1 - Biological Sampling:
Benthic Macroinvertebrates:
|
Site ID |
Date |
Drainage Area (mi2) |
Ecoregion |
Major Drainage |
BM Sample Gear |
BMIBI score |
BMIBI Class |
52b BMIBI BIT |
BMIBI Pass/Fail |
|
141 |
8/20/20 |
224 |
52b |
MS |
Hess |
57 |
Good |
61 |
Fail |
|
1149 |
8/28/17 |
221 |
52b |
MS |
Hess |
63 |
Good |
61 |
Pass |
|
141 |
8/19/15 |
224 |
52b |
MS |
Hess |
64 |
Good |
61 |
Pass |
Fish:
|
Site ID |
Date |
Drainage Area (mi2) |
Ecoregion |
Major Drainage |
Riffle Stream? |
FIBI score |
FIBI Class |
52b FIBI BIT |
FIBI Pass/Fail |
|
141 |
8/20/20 |
224 |
52b |
MS |
NA |
50 |
Fair |
52 |
Fail |
|
141 |
8/19/15 |
224 |
52b |
MS |
NA |
59 |
Good |
52 |
Pass |
|
141 |
9/6/12 |
224 |
52b |
MS |
NA |
68 |
Good |
52 |
Pass |
Overall:
|
Community |
Assessment Type |
Assessment Result |
Support Level |
IR Category |
Reason |
|
Benthic Macroinvertebrates |
Evaluated |
Pass (2/3) |
Full |
|
|
|
Fish |
Evaluated |
Pass (2/3) |
Full |
1 |
Assessment was evaluated because some of the samples used to complete |
|
Overall |
Evaluated |
Pass |
Full |
the assessment were greater than five years old. |
Class BWW1 - Trout Natural Reproduction:
Even though Yellow River is classified as a BWW1 stream, based on the January 2021 trout reproduction in Iowa streams summary prepared by the DNR Fisheries Bureau, the Class BWW1 aquatic life use of Yellow River 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 HH – No Data