Lime Creek IA 02-CED-524
mouth (SW 1/4 S4 T86N R10W Benton Co.) to confluence with unnamed tributary in S1 T87N R10W Buchanan Co.
- Assessment Cycle
- 2020
- Release Status
- Final
- Data Collection Period
- Overall IR Category
- 5 - Water is impaired or threatened and a TMDL is needed.
- Trend
- Unknown
- Created
- 6/4/2020 8:55:16 AM
- Updated
- 10/16/2020 8:48:01 AM
Assessment Summary
The presumptive Class A1 use remains assessed as "not supported" due to levels of indicator bacteria (E. coli) that violated state water quality criteria. The Class BWW1 use was assessed as "fully supported" based on biological sampling data. All other designated uses were "not assessed".
Assessment Explanation
Sources
of Data: Data Source Data Source ID Data Type Data Age Site ID Site
Name Site
Description Iowa DNR 6 WQ CY2010-2011 11100001 Lime
Creek near Brandon LiCr2 Iowa DNR 6 WQ CY2010-2011 15100010 Lime
Creek At
290 St. Iowa DNR 6 WQ CY2010-2011 15100011 Lime
Creek At
Finley Ave. Iowa DNR 6 BIO See Below 154 Lime
Creek Lime
Creek Park - Brandon
Presumptive
Class A1 - Indicator Bacteria: Site ID Data Source ID # Samples / # Years 2010 Geometric Mean 2011 Geometric Mean Annual Geometric Mean Violation # Violations % Violations Significantly >10% Violations Assessment Type Support Level 11100001 6 22 / 2 1426 1874 Yes 21 95% Yes Evaluated Not 15100010 6 22 / 2 1615 1322 Yes 21 95% Yes Evaluated Not 15100011 6 22 / 2 1963 1819 Yes 21 95% Yes Evaluated Not
Class
BWW1 - Biological Sampling: Benthic
Macroinvertebrates: BioNet Site ID Date Drainage Area (mi2) Ecoregion Major Drainage BM Sample Gear BMIBI score BMIBI Class 47c BMIBI BIT BMIBI Pass/ Fail 154 8/2/18 33 47c MS/WW Hess 83 Excellent 70 Pass 154 8/17/17 33 47c MS/WW Hess 75 Good 70 Pass 154 7/28/16 33 47c MS/WW Hess 68 Good 70 Fail Fish: BioNet Site ID Date Drainage Area (mi2) Ecoregion Major Drainage Riffle Stream? FIBI score FIBI Class 47c FIBI BIT FIBI Pass/ Fail 154 8/2/18 33 47c MS/WW Yes 85 Excellent 65 Pass 154 8/17/17 33 47c MS/WW Yes 92 Excellent 65 Pass 154 7/28/16 33 47c MS/WW Yes 84 Excellent 65 Pass
Overall: Community Assessment Type Assessment Result Support Level Earned IR Category Actual IR Category Reason Benthic Macroinvertebrates Monitored Pass (2/3) Full Fish Monitored Pass (2/2) Full Overall Monitored Pass Full 1 1 Assessment is monitored because all samples used were collected in the last five years. Class HH - No Data
Assessment Key Dates
| 5/29/2010 | Non-fixed Monitoring Start Date |
| 7/28/2016 | Biological Monitoring |
| 7/29/2011 | Non-fixed Monitoring End Date |
| 8/17/2017 | Biological Monitoring |
| 8/2/2018 | Biological Monitoring |
Methods
| 150 | Monitoring data more than 5 years old |
| 220 | Non-fixed station physical/chemical monitoring (conventional pollutant only) |
| 315 | Regional reference site approach |
| 320 | Benthic macroinvertebrate surveys |
| 330 | Fish surveys |
| 420 | Indicator bacteria monitoring |