Walnut Creek IA 03-SSK-953
mouth (S5 T82N R23W Story Co.) to confluence with unnamed tributary in SE 1/4 S34 T83N R24W Story Co.
- Assessment Cycle
- 2022
- Release Status
- Final
- Cycle Period
- 2018 - 2020
- Overall IR Category
- 5 - Water is impaired or threatened and a TMDL is needed.
- Trend
- Unknown
- Created
- 12/22/2021 2:11:05 PM
- Updated
- 12/22/2021 2:14:47 PM
Assessment Summary
The Class BWW2 use was assessed as "not supported" based on biological sampling data. All other designated uses were "not assessed."
Assessment Explanation
Data
Sources: Data Source Data Source ID Data Type Data Age Site ID Site Name Site Description Iowa DNR 6 BIO See Below 210 Walnut Creek Ames Iowa DNR 6 BIO See Below 859 Walnut Creek Huxley Class
BWW2 - Biological Sampling: Benthic
Macroinvertebrates: BioNet Site ID Date Drainage Area (mi2) Ecoregion Major Drainage/Thermal BM Sample Gear BMIBI score BMIBI Class 47b BMIBI BIT BMIBI Pass/ Fail 859 8/22/11 18 47b MS/WW LowFlow ArtSub 48 Fair 62 Fail 210 7/19/11 13 47b MS/WW Surb 68 Good 62 Pass 210 7/17/07 13 47b MS/WW Hess 77 Excellent 62 Pass BioNet Site ID Date Drainage Area (mi2) Ecoregion Major Drainage/Thermal Riffle Stream? FIBI score FIBI Class 47b FIBI BIT FIBI Pass/ Fail 859 7/20/11 18 47b MS/WW No 17 Poor 32 Fail 210 7/19/11 13 47b MS/WW Yes 36 Fair 53 Fail 210 7/17/07 13 47b MS/WW Yes 29 Fair 53 Fail Overall:
Community Assessment Type Assessment Result Support Level IR Category Reason Benthic Macroinvertebrates Evaluated Pass (2/3) Full Fish Evaluated Fail (0/3) Not Overall Evaluated Fail Not 5bt Assessment was evaluated because it included samples
not collected in the last five years.
Presumptive Class A1 - No Data
Fish:
Assessment Key Dates
| 7/17/2007 | Biological Monitoring |
| 7/19/2011 | Biological Monitoring |
| 7/20/2011 | Biological Monitoring |
Methods
| 150 | Monitoring data more than 5 years old |
| 315 | Regional reference site approach |
| 320 | Benthic macroinvertebrate surveys |
| 330 | Fish surveys |