Dry Run IA 02-CED-554
mouth (S18 T89N R13W Black Hawk Co.) to confluence with unnamed tributary in S23 T89N R14W BlackHawk Co
- Cycle
- 2020
- Release Status
- Final
- Overall IR
- 5 - Water is impaired or threatened and a TMDL is needed.
- Trend
- Unknown
- Created
- 8/31/2020 2:08:33 PM
- Updated
- 10/16/2020 9:23:22 AM
The Class A1 use remains assessed as "partially supported” due to levels of indicator bacteria (E. coli) that exceeded state water quality criteria. The Class BWW2 use was assessed as "partially supported" based on biological sampling data.
Sources
of Data: Data Source Data Source ID Data Type Data Age Site ID Site
Name Site
Description Iowa DNR 6 WQ CY2012-2014 11070006 Dry
Run Creek DRC-1 Iowa DNR 6 WQ CY2012-2014 11070007 Dry
Run Creek DRC-4 Iowa DNR 6 WQ CY2012-2014 15070002 Dry
Run Creek DRC-3 Iowa DNR 6 BIO See Below 215 Dry
Run Creek DS
of Waterloo RD – DRC1 Iowa DNR 6 BIO See Below 455 Dry
Run Creek US
of University AVE near UNI Campus – DRC4
Class
A1 - Indicator Bacteria: Site ID Data Source ID # Samples / # Years 2012 Geometric Mean 2013 Geometric Mean 2014 Geometric Mean Annual Geometric Mean Violation # Violations % Violations Significantly >10% Violations Assessment Type Support Level 11070006 6 23 / 3 513 1114 320 Yes 15 65% Yes Evaluated Not 11070007 6 24 / 3 170 435 238 Yes 11 46% Yes Evaluated Partial 15070002 6 24 / 3 317 921 232 Yes 11 46% Yes Evaluated Partial
Class
A1 - pH: Site ID Data Source ID # Samples / # Years Maximum Value Mean Value Median Value # Violations % Violations Significantly >10% Violations Assessment Type Support Level 11070006 6 17 / 2 8.4 8.1 8.2 0 0% No Evaluated Full 11070007 6 17 / 2 8.3 7.9 8 0 0% No Evaluated Full 15070002 6 16 / 2 8.4 8.1 8.2 0 0% No Evaluated Full
Class BWW2 -
Conventional Parameters: Site ID Data Source ID Parameter Name # Samples / # Years Maximum Value Mean Value Median Value # Acute / Chronic Violations % Acute/ Chronic Violations Significantly >10% Violations Assessment Type Support Level 11070006 6 Chloride 16 / 2 76 42 38 0 / 0 0% / 0% No Evaluated Full 11070006 6 Dissolved oxygen 19 / 2 13 10.2 10.2 NA / 0 NA / 0% No Evaluated Full 11070006 6 pH 17 / 2 8.4 8.1 8.2 0 / NA 0% / NA No Evaluated Full 11070006 6 Temperature 19 / 2 19.5 15.3 16.2 0 / 0 0% / 0% No Evaluated Full 11070007 6 Chloride 19 / 2 76 43 41 0 / 0 0% / 0% No Evaluated Full 11070007 6 Dissolved oxygen 19 / 2 18.4 9.8 8.8 NA / 0 NA / 0% No Evaluated Full 11070007 6 pH 17 / 2 8.3 7.9 8 0 / NA 0% / NA No Evaluated Full 11070007 6 Temperature 19 / 2 19.3 14.4 14.9 0 / 0 0% / 0% No Evaluated Full 15070002 6 Chloride 18 / 2 63 46 47 0 / 0 0% / 0% No Evaluated Full 15070002 6 Dissolved oxygen 18 / 2 17.8 10.8 10.2 NA / 0 NA / 0% No Evaluated Full 15070002 6 pH 16 / 2 8.4 8.1 8.2 0 / NA 0% / NA No Evaluated Full 15070002 6 Temperature 18 / 2 19.8 15.8 15.9 0 / 0 0% / 0% No Evaluated Full
Class
BWW2 - 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 455 8/16/18 9 47c MS/WW Hess 53 Fair 70 Fail 455 7/26/16 9 47c MS/WW Hess 55 Fair 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 455 8/16/18 9 47c MS/WW Yes 24 Poor 65 Fail 215 8/16/18 24 47c MS/WW No 77 Excellent 44 Pass 455 7/26/16 9 47c MS/WW Yes 46 Fair 65 Fail 455 7/30/15 9 47c MS/WW Yes 55 Good 65 Fail
Overall: Community Assessment Type Assessment Result Support Level Earned IR Category Actual IR Category Reason Benthic
Macroinvertebrates Monitored Fail (0/2) Partial Fish Monitored Fail (1/4) Partial Overall Monitored Fail Partial 5bv 5bv Assessment
is monitored because it used samples collected in the last five years.