Lake Meyer IA 01-TRK-158
Winneshiek County S34T97NR9W 3 mi SW of Calmar.
- Cycle
- 2020
- Release Status
- Final
- Overall IR
- 1 - All designated uses are met.
- Trophic
- Eutrophic
- Trend
- Improving
- Trend Comment
- Chlorophyll a and Secchi TSI's continue to decline in this waterbody. Additionally, the addition of class HH full support due to fish tissue monitoring upgraded the status of the waterbody to Category 1.
- Created
- 7/15/2020 1:50:58 PM
- Updated
- 10/14/2020 8:29:13 AM
The Class A1 use is assessed as “fully supported.” The Class BLW use is assessed (monitored) as “fully supported.” The Class HH use remains assessed (monitored) as “fully supported" based on fish tissue monitoring. Note: A TMDL for nutrients and siltation at Lake Meyer was prepared by DNR and approved by EPA in 2005.
Sources of
Data: Data Source Data Source ID Data Type Data Age Site ID Site Name Site Description Iowa DNR 6 WQ CY 2014-2018 22960004 Lake Meyer (maximum water depth) Lake Meyer Deep Point Iowa DNR
FT See Below 245 Lake Meyer
Class A1 - Indicator
Bacteria: No Data 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 22960004 6 12 / 5 9 8.4 8.4 0 0% NO Monitored Full Class A1 - Lake
TSI's Site ID Data Source ID Parameter Name # Samples / # Years Minimum Value Maximum Value Median Value Median TSI Violation Assessment Type Support Level 22960004 6 Chlorophyll a TSI 12 / 5 36 75 60 NO Monitored Full 22960004 6 Secchi TSI 12 / 5 40 73 58 NO Monitored Full 22960004 6 Total Phosphorus TSI 12 / 5 28 81 64 NA NA NA 22960004 6 Inorganic suspended solids 12 / 5 0.4 24.4 2 NA NA NA Class BLW -
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 22960004 6 Ammonia 12 / 5 0.271 0.07 0.03 0 / 0 0% / 0% NO Monitored Full 22960004 6 Dissolved oxygen 12 / 5 18.1 12.1 11.7 NA / 1 NA / 8% NO Monitored Full 22960004 6 pH 12 / 5 9 8.4 8.4 0 / NA 0% / NA NO Monitored Full 22960004 6 Temperature 12 / 5 27.4 22.3 22.3 0 / 0 0% / 0% NO Monitored Full Class BLW -
Lake Planktonic Cyanobacteria: Site ID Data Source ID # Samples Maximum Cyanobacteria Wet Mass Maximum Cyanobacteria % Composition Median Cyanobacteria Wet Mass Median Cyanobacteria % Composition Median Cyanobacteria Wet Mass = 75th
Percentile Assessment Type Support Level 22960004 6 9 51.496 78.2 % 2.207 21.4 % NO Evaluated NA Class HH – Fish
Tissue Sampling: Seg ID Site ID Date Species Name Biopart # in sample chlordane result chlordane violation? PCBs result PCBs violation? Hg result Hg violation? Assessment Type Support Level 158 78 6/29/17 largemouth bass plug 3
0.193 No Monitored Full
Note: In 2015, Lake Meyer was lowered 10 feet to create water retention basins and in-lake habitat could be installed. In addition, sediment was removed and the dam was repaired.