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
- 2022
- Release Status
- Final
- Data Collection Period
- Overall IR Category
- 5 - Water is impaired or threatened and a TMDL is needed.
- Trend
- Unknown
- Created
- 12/16/2021 6:58:05 AM
- Updated
- 12/22/2021 12:36:41 PM
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 and water quality monitoring 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 CRWQ 23 WQ CY 2018-2020 99990091 Lime Creek
Iowa DNR 6 BIO See Below 154 Lime
Creek Lime
Creek Park - Brandon Presumptive Class
- Indicator Bacteria: Site ID Data Source ID # Samples per Year (2018/ 2019/2020) 2018 Geometric Mean 2019 Geometric Mean 2020 Geometric Mean Violates Annual Geometric Mean? # 2018 SSM violations / SSM Violations
needed for impairment # 2019 SSM violations / SSM Violations
needed for impairment # 2020 SSM violations / SSM Violations
needed for impairment Violates Annual SSM Significantly >10%
Rule? Assessment Type Support Level 99990091 23 5/5/5 922 407 275 YES 5 / NA 4 / NA 2 / NA NA Evaluated Not Class A - pH Site ID Data Source ID # Samples / # Years Minimum Value Maximum Value Mean Value # Violations Violations needed for impairment Violates Significantly >10% Rule? Assessment Type Support Level 99990091 23 13 / 3 6.73 9.05 7.85 1 4 NO Monitored Full Class BWW1 -
Conventional Parameters: Site ID Data Source ID Parameter Name # Samples / # Years Minimum Value Maximum Value Mean Value # Violations # Acute / Chronic Violations Violations needed for impairment Violates Significantly >10% Rule? Assessment Type Support Level 99990091 23 Chloride 15 / 3 14.1 27.3 19.8 NA 0 / 0 4 NO Monitored Full 99990091 23 Dissolved Oxygen 15 / 3 7.8 11.3 9 0 NA / NA 4 NO Monitored Full 99990091 23 pH 13 / 3 6.73 9.05 7.85 1 NA / NA 4 NO Monitored Full 99990091 23 Sulfate 15 / 3 10.2 20.4 15.1 0 NA / NA 4 NO Monitored Full 99990091 23 Temperature 15 / 3 9.2 21.3 17.7 0 NA / NA 4 NO Monitored Full Site ID Date Drainage Area (mi2) Ecoregion Major Drainage BM Sample Gear BMIBI score BMIBI Class 47c BMIBI BIT BMIBI Pass/ Fail 154 9/23/20 32.5 47c MS Hess 75 Good 70 Pass 154 7/22/19 32.5 47c MS Hess 72 Good 70 Pass 154 8/2/18 32.5 47c MS Hess 83 Excellent 70 Pass 154 8/17/17 32.5 47c MS Hess 75 Good 70 Pass 154 7/28/16 32.5 47c MS Hess 68 Good 70 Fail Fish: Site ID Date Drainage Area (mi2) Ecoregion Major Drainage Riffle Stream? FIBI score FIBI Class 47c FIBI BIT FIBI Pass/ Fail 154 9/23/20 32.5 47c MS Yes 90 Excellent 65 Pass 154 7/22/19 32.5 47c MS Yes 90 Excellent 65 Pass 154 8/2/18 32.5 47c MS Yes 85 Excellent 65 Pass 154 8/17/17 32.5 47c MS Yes 92 Excellent 65 Pass 154 7/28/16 32.5 47c MS Yes 84 Excellent 65 Pass Overall: Community Assessment Type Assessment Result Support Level IR Category Reason Benthic
Macroinvertebrates Monitored Pass (4/5) Full Fish Monitored Pass (5/5) Full 1 Assessment was monitored
because the assessment used multiple Overall Monitored Pass Full samples collected in the
last five years.
Class BWW1 - Biological Sampling:
Benthic Macroinvertebrates:
Class HH – No Data
Assessment Key Dates
| 5/17/2018 | Non-fixed Monitoring Start Date |
| 7/28/2016 | Biological Monitoring |
| 9/29/2020 | Non-fixed Monitoring End Date |
| 8/17/2017 | Biological Monitoring |
| 8/2/2018 | Biological Monitoring |
| 7/22/2019 | Biological Monitoring |
| 9/23/2020 | Biological Monitoring |
Methods
| 220 | Non-fixed station physical/chemical monitoring (conventional pollutant only) |
| 315 | Regional reference site approach |
| 320 | Benthic macroinvertebrate surveys |
| 330 | Fish surveys |
| 380 | Quantitative physical habitat assessment |
| 420 | Indicator bacteria monitoring |