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 WQ 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 8/14/23 86.1 47e MO Surber 46 Fair 54 Fail 6 8/19/20 86.1 47e MO Surber 52 Fair 54 Fail Site ID Date Drainage Area (mi2) Ecoregion Major Drainage Riffle Stream? FIBI score FIBI Class 47e FIBI BIT FIBI Pass/Fail 6 8/14/23 86.1 47e MO NA 37 Fair 31 Pass 6 8/19/20 86.1 47e MO NA 42 Fair 31 Pass Community Assessment Type Assessment Result Support Level IR Category Reason Benthic
Macroinvertebrates Monitored Fail (0/2) Not Fish Monitored Pass (2/2) Full Assessment was monitored because the
assessment was Overall Monitored Fail Not 5bv based on samples collected in a recent
five-year period. Site ID Data Source ID # Days Monitoring (2019) DO Criteria Type # 2019 violations / Violations needed for impairment Violates Annual Significantly >10% Rule? Assessment Type Support Level 24 hr 0/4 No 367 6 14 16 hr 0/4 No Evaluated Full
Presumptive Class A1 – No Data
Class BWW2 - Biological Sampling:
Benthic Macroinvertebrates:
Fish:
Overall:
Class BWW2- Continuous DO Monitoring: