Floyd River IA 06-FLO-1554
from city of Alton (north line S11 T94N R44W Sioux Co.) to confluence with North Fork Floyd R. in S9 T97N R41W O'Brien 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 355 Floyd River Sanborn – REMAP #67 Iowa DNR 6 BIO/WQ See Below 364 Floyd River Alton – REMAP #85 Class BWW2 - Biological Sampling: Benthic Macroinvertebrates: Site ID Date Drainage Area (mi2) Ecoregion Major Drainage BM Sample Gear BMIBI score BMIBI Class 47a BMIBI BIT BMIBI Pass/Fail 355 8/18/20 43.9 47a MO Floating Art Sub 26 Poor 54 Fail 364 8/17/20 260.6 47a MO Floating Art Sub 62 Good 54 Pass Site ID Date Drainage Area (mi2) Ecoregion Major Drainage Riffle Stream? FIBI score FIBI Class 47a FIBI BIT FIBI Pass/Fail 355 8/18/20 43.9 47a MO NA 28 Fair 43 Fail 364 8/17/20 260.6 47a MO NA 36 Fair 43 Fail Community Assessment Type Assessment Result Support Level IR Category Reason Benthic
Macroinvertebrates Evaluated Fail (1/2) Not Fish Evaluated Fail (0/2) Not Assessment was evaluated because the samples
used to Overall Evaluated Fail Not 5bt complete the assessment were collected in a
single year. Site ID Data Source ID # Days Monitoring (2020) DO Criteria Type # 2020 violations / Violations needed for impairment Violates Annual Significantly >10% Rule? Assessment Type Support Level 24 hr 0/5 No 355 6 21 16 hr 0/5 No Monitored Full 24 hr 0/5 No 364 6 19 16 hr 0/5 No Monitored Full
Presumptive Class A1 – No Data
Fish:
Overall:
Class BWW2- Continuous DO Monitoring: