East Nishnabotna River IA 05-NSH-1816
from Page/Montgomery Co. line to state Highway 48 bridge approximately 1.5 miles north of Red Oak at east line of S8 T72N R38W Montgomery Co.
- 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.
- Trend
- Unknown
- Created
- 1/3/2022 7:06:59 AM
- Updated
- 1/14/2022 12:57:24 PM
The Class BWW1 use was assessed as "WINOFI" based on biological sampling data. The Class HH (fish consumption) use was assessed as "fully supported" based on fish tissue 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 680 East
Nishnabotna River Red
Oak – DS1 Iowa DNR 6 BIO See Below 681 East
Nishnabotna River Red
Oak – US1 Iowa DNR 6 FT See Below 139 East
Nishnabotna River Near
Red Oak Benthic
Macroinvertebrates: BioNet Site ID Date Drainage Area (mi2) Ecoregion Major Drainage/ Thermal BM Sample Gear BMIBI score BMIBI Class 47e BMIBI BIT BMIBI Pass/ Fail 680 10/12/07 895 47e MO/WW ArtSub 46 Fair 54 Fail 681 10/12/07 891 47e MO/WW ArtSub 42 Fair 54 Fail 680 9/6/07 895 47e MO/WW ArtSub 50 Fair 54 Fail Community Assessment Type Assessment Result Support Level IR Category Reason Benthic
Macroinvertebrates Evaluated Fail (0/3) WINOFI 3bu Assessment
was evaluated because the drainage areas of the sample sites were larger than
the calibrated range. Site ID Biopart Year Species # in sample / # of samples Avg Length (cm) (Avg) Hg (ppm) Chlordane (ppm) Sum PCBs (ppm) 139 fillet 2011 channel catfish 5 44.2 0.039 0.037 0.09 139 tissue plug 2020 channel catfish 10 49.4 0.093
139 tissue plug 2012 freshwater drum 5 59.0 0.216
Support Level Full
Class BWW1 - Biological Sampling:
Overall:
Class HH - Fish Tissue Sampling: