West Nishnabotna River IA 05-NSH-1446
from confluence with Elk Cr. (S36 T81N R38W Shelby Co.) to the Crawford-Carroll county line (west line S36 T82N R37W Crawford Co.)
The Class BWW2 use was assessed as “not supported” based on biological sampling data. All other designated uses were "not assessed."
Data Sources: Data
Source Data
Source ID Data
Type Data
Age Site
ID Site Name Site Description Iowa
DNR 6 BIO See
Below 6 West Nishnabotna River Shelby County Upper Nishnabotna
Habitat Area Iowa
DNR 6 BIO See
Below 367 West Nishnabotna River Irwin – REMAP #60 Site
ID Date Drainage
Area (mi2) Ecoregion Major
Drainage BM
Sample Gear BMIBI
score BMIBI
Class 47e
BMIBI BIT BMIBI
Pass/Fail 6 8/19/20 86.1 47e MO Surber 52 Fair 54 Fail 367 9/9/19 85.8 47e MO Art
Sub 46 Fair 54 Fail 6 8/29/16 86.1 47e MO Floating
Art Sub 52 Fair 54 Fail Fish: Site
ID Date Drainage
Area (mi2) Ecoregion Major
Drainage Riffle
Stream? FIBI
score FIBI
Class 47e
FIBI BIT FIBI
Pass/Fail 6 8/19/20 86.1 47e MO NA 42 Fair 31 Pass 367 9/9/19 85.8 47e MO NA 28 Fair 31 Fail 6 8/29/16 86.1 47e MO NA 28 Fair 31 Fail Community Assessment
Type Assessment
Result Support
Level IR
Category Reason Benthic Macroinvertebrates Monitored Fail
(0/3) Not Fish Monitored Fail
(1/3) Not 5bv Assessment was monitored because the assessment was based
on samples Overall Monitored Fail Not Collected in the last five years. Site ID Data Source ID # Days Monitoring (2016/2017/2018/ 2019/2020) DO Criteria Type # 2016 violations /
Violations needed for impairment # 2017 violations /
Violations needed for impairment # 2018 violations
/ Violations needed for impairment # 2019 violations /
Violations needed for impairment # 2020 violations /
Violations needed for impairment Violates Annual Significantly >10% Rule? Assessment Type Support Level
24 hr NA NA NA NA 0/4 No
367 6 0/0/0/0/14 16 hr NA NA NA NA 0/4 No Evaluated Full
Presumptive Class A1 – No Data
Class BWW2 - Biological Sampling:
Benthic Macroinvertebrates:
Overall:
Class BWW2- Continuous DO Monitoring: