Beaver Creek IA 02-CED-555
mouth (S34 T90N R14W Black Hawk Co.) to confluence with South Beaver Cr. in S25 T90R R17W Butler 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
- 12/22/2021 1:17:43 PM
- Updated
- 1/28/2022 1:24:51 PM
Assessment Summary
The Class A2 use was assessed as "WINOFI due to levels of indicator bacteria (E. coli) that violated state water quality criteria. The Class A3 use was 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 ambient water quality monitoring data and 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 WQ CY 2018-2020 10070001 Beaver Creek near Cedar Falls
CRWQ 23 WQ CY 2018-2020 99990069 Beaver Creek
CRWQ 23 WQ CY 2018-2020 99990074 Beaver Creek
CRWQ 23 WQ CY 2018-2020 99990075 Beaver Creek
Iowa DNR 6 BIO See Below 373 Beaver
Creek New
Hartford – REMAP #76 Iowa DNR 6 BIO See Below 947 Beaver
Creek Cedar
Falls 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 10070001 6 7/8/8 573 430 130 NO 0 / 3 0 / 3 0 / 3 NO Monitored WINOFI 99990069 23 5/5/5 443 255 237 NO 0 / NA 0 / NA 0 / NA NA Evaluated WINOFI 99990074 23 5/5/5 700 485 346 YES 0 / NA 0 / NA 0 / NA NA Evaluated WINOFI 99990075 23 5/5/5 1133 385 267 YES 0 / NA 0 / NA 0 / NA NA Evaluated WINOFI 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 10070001 6 7/8/8 573 430 130 YES 6 / 3 5 / 3 2 / 3 YES Monitored Not 99990069 23 5/5/5 443 255 237 YES 4 / NA 2 / NA 3 / NA NA Evaluated Not 99990074 23 5/5/5 700 485 346 YES 3 / NA 5 / NA 4 / NA NA Evaluated Not 99990075 23 5/5/5 1133 385 267 YES 4 / NA 4 / NA 2 / NA NA Evaluated Not 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 10070001 6 36 / 3 7.1 8.4 8.1 0 7 NO Monitored Full 99990069 23 14 / 3 7.73 8.53 8.11 0 4 NO Monitored Full 99990074 23 14 / 3 7.9 8.5 8.1 0 4 NO Monitored Full 99990075 23 14 / 3 7.75 8.36 8.12 0 4 NO Monitored Full 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 10070001 6 Ammonia 36 / 3 0.02 0.37 0.04 NA 0 / 0 7 NO Monitored Full 10070001 6 Chloride 36 / 3 14 22 18 NA 0 / 0 7 NO Monitored Full 99990069 23 Chloride 15 / 3 14.3 20.3 16.6 NA 0 / 0 4 NO Monitored Full 99990074 23 Chloride 15 / 3 14.3 21.5 17.3 NA 0 / 0 4 NO Monitored Full 99990075 23 Chloride 15 / 3 14.4 21.9 17.3 NA 0 / 0 4 NO Monitored Full 10070001 6 Dissolved Oxygen 36 / 3 7.5 13.5 10.2 0 NA / NA 7 NO Monitored Full 99990069 23 Dissolved Oxygen 15 / 3 6.1 10.8 8.2 0 NA / NA 4 NO Monitored Full 99990074 23 Dissolved Oxygen 15 / 3 6 11.1 8.1 0 NA / NA 4 NO Monitored Full 99990075 23 Dissolved Oxygen 15 / 3 5.6 10.8 8.1 0 NA / NA 4 NO Monitored Full 10070001 6 pH 36 / 3 7.1 8.4 8.1 0 NA / NA 7 NO Monitored Full 99990069 23 pH 14 / 3 7.73 8.53 8.11 0 NA / NA 4 NO Monitored Full 99990074 23 pH 14 / 3 7.9 8.5 8.1 0 NA / NA 4 NO Monitored Full 99990075 23 pH 14 / 3 7.75 8.36 8.12 0 NA / NA 4 NO Monitored Full 10070001 6 Sulfate 36 / 3 11 29 19 0 NA / NA 7 NO Monitored Full 99990069 23 Sulfate 15 / 3 10.5 25.1 18.2 0 NA / NA 4 NO Monitored Full 99990074 23 Sulfate 15 / 3 11.9 27.1 19 0 NA / NA 4 NO Monitored Full 99990075 23 Sulfate 15 / 3 12.2 25.8 18.7 0 NA / NA 4 NO Monitored Full 10070001 6 Temperature 36 / 3 0.1 25.9 11.2 0 NA / NA 7 NO Monitored Full 99990069 23 Temperature 15 / 3 9.1 24.1 19.3 0 NA / NA 4 NO Monitored Full 99990074 23 Temperature 15 / 3 8.5 23.8 19.1 0 NA / NA 4 NO Monitored Full 99990075 23 Temperature 15 / 3 8.1 24.3 18.9 0 NA / NA 4 NO Monitored Full Site ID Data Source ID Parameter Name # Samples / # Years Maximum Value Mean Value Median Value # Acute / Chronic Violations >1 Acute / Chronic Violation Assessment Type Support Level 10070001 6 Aluminum 14 / 3 5.5 1 0.6 0 / 0 NO Monitored Full 10070001 6 Arsenic 13 / 3 1.3 0.8 0.8 0 / 0 NO Monitored Full 10070001 6 Cadmium 13 / 3 0.06 0.03 0.02 0 / 0 NO Monitored Full 10070001 6 Chromium 13 / 3 1.2 0.8 0.9 0 / 0 NO Monitored Full 10070001 6 Lead 13 / 3 0.2 0.1 0.1 0 / 0 NO Monitored Full 10070001 6 Nickel 13 / 3 3.1 2.3 2.3 0 / 0 NO Monitored Full 10070001 6 Silver 13 / 3 0.025 0.025 0.025 0 / 0 NO Monitored Full 10070001 6 Zinc 13 / 3 3.2 1.9 2.1 0 / 0 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 373 8/25/20 375 47c MS Art Sub 73 Good 52 Pass 947 8/19/19 391 47c MS Art Sub 70 Good 52 Pass Fish: Site ID Date Drainage Area (mi2) Ecoregion Major Drainage Riffle Stream? FIBI score FIBI Class 47c FIBI BIT FIBI Pass/ Fail 373 8/25/20 375 47c MS No 58 Good 44 Pass Overall: Community Assessment Type Assessment Result Support Level IR Category Reason Benthic
Macroinvertebrates Monitored Pass (2/2) Full
Fish Evaluated Pass (1/1) Full 1 Assessment was monitored
because the BMIBI assessment used multiple Overall Monitored Pass Full samples collected in the
last five years. Class BWW1 - Continuous DO Monitoring: Site ID Data Source ID # Days Monitoring (2016/2017/2018/ 2019/2020) DO Criteria Type # 2016 violations /
Violations needed for impairment # 2017 violations /
Violations needed for impairment # 2018 violations
/ Violations needed for impairment # 2019 violations /
Violations needed for impairment # 2020 violations /
Violations needed for impairment Violates Annual Significantly >10% Rule? Assessment Type Support Level
24 hr NA NA NA NA 0/4 No
373 6 0/0/0/0/15 16 hr NA NA NA NA 0/4 No Evaluated Full
Class A2 - Indicator Bacteria:
Class A3 - Indicator Bacteria:
Class A – pH:
Class BWW1 - Conventional Parameters:
Class BWW1 - Toxic Parameters:
Class BWW1 - Biological Sampling:
Benthic Macroinvertebrates:
Class
HH – No Data
Assessment Key Dates
1/8/2018 | Fixed Monitoring Start Date |
12/7/2020 | Fixed Monitoring End Date |
8/25/2020 | Biological Monitoring |
8/19/2019 | Biological Monitoring |
5/17/2018 | Non-fixed Monitoring Start Date |
9/28/2020 | Non-fixed Monitoring End Date |
Methods
220 | Non-fixed station physical/chemical monitoring (conventional pollutant only) |
230 | Fixed station physical/chemical (conventional plus toxic pollutants) |
315 | Regional reference site approach |
320 | Benthic macroinvertebrate surveys |
330 | Fish surveys |
380 | Quantitative physical habitat assessment |
420 | Indicator bacteria monitoring |