Upper Mississippi River-Brainerd Watershed Monitoring and Assessment Report
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Watershed health May 2019 Upper Mississippi River-Brainerd Watershed Monitoring and Assessment Report Authors Chad R. Anderson, Joe Hadash, Cadie Olsen, Sophia Vaughan, Anthony J. Dingmann, Mike Bourdaghs, Bruce Monson Contributors/acknowledgements Citizen Stream Monitoring Program Volunteers Minnesota Department of Natural Resources Minnesota Department of Health Minnesota Department of Agriculture Aitkin County SWCD Crow Wing SWCD Central Lakes College - Natural Resources Program The MPCA is reducing printing and mailing costs by using the Internet to distribute reports and information to wider audience. Visit our website for more information. MPCA reports are printed on 100% post-consumer recycled content paper manufactured without chlorine or chlorine derivatives. Project dollars provided by the Clean Water Fund (from the Clean Water, Land and Legacy Amendment). Minnesota Pollution Control Agency 520 Lafayette Road North | Saint Paul, MN 55155-4194 | 651-296-6300 | 800-657-3864 | Or use your preferred relay service. | [email protected] This report is available in alternative formats upon request, and online at www.pca.state.mn.us. Document number: wq-ws3-07010104b Table of contents List of acronyms .............................................................................................................................. viii Executive summary ............................................................................................................................1 Introduction ......................................................................................................................................2 The watershed monitoring approach ............................................................................................................... 3 Assessment methodology ................................................................................................................................ 6 Watershed overview ...................................................................................................................................... 11 Watershed-wide data collection methodology .............................................................................................. 24 Individual aggregated 12-HUC subwatershed results ......................................................................... 28 Aggregated 12-HUC subwatersheds .............................................................................................................. 28 Lower Rice River Aggregated 12-HUC HUC 0701010401-01 ............................................................... 29 Upper Rice River Aggregated 12-HUC HUC 0701010401-02 ............................................................... 33 Ripple River Aggregated 12-HUC HUC 0701010402-01 .............................................................................. 38 Little Willow River Aggregated 12-HUC HUC 0701010403-01 ..................................... 43 City of Aitkin-Mississippi River Aggregated 12-HUC HUC 0701010404-01 ..................................... 48 Cedar Creek Aggregated 12-HUC HUC 0701010404-02 ..................................... 52 Sisabagamah Creek Aggregated 12-HUC HUC 0701010404-03 ..................................... 56 City of Brainerd-Mississippi River Aggregated 12-HUC HUC 0701010405-01 ..................................... 60 Rabbit River Aggregated 12-HUC HUC 0701010405-02 ..................................... 68 Nokasippi River Aggregated 12-HUC HUC 0701010406-01 ..................................... 71 Daggett Brook Aggregated 12-HUC HUC 0701010406-02 ..................................... 76 Little Elk River Aggregated 12-HUC HUC 0701010407-01 ..................................... 79 Swan River Aggregated 12-HUC HUC 0701010408-01 ..................................... 84 City of Little Falls-Mississippi River Aggregated 12-HUC HUC 0701010409-01 ..................................... 89 Pike Creek Aggregated 12-HUC HUC 0701010409-02 ..................................... 92 Watershed-wide results and discussion ............................................................................................ 94 Stream water quality ...................................................................................................................................... 94 Lake water quality .......................................................................................................................................... 96 Fish contaminant results ................................................................................................................................ 97 Pollutant load monitoring ............................................................................................................................ 106 Stream flow .................................................................................................................................................. 112 Wetland condition ........................................................................................................................................ 113 Transparency trends for the Upper Mississippi River-Brainerd Watershed ................................................ 119 Remote sensing for lakes in the Upper Mississippi River-Brainerd Watershed ........................................... 119 Priority waters for protection and restoration in the Upper Mississippi River-Brainerd Watershed .......... 120 i Summaries and recommendations ................................................................................................. 122 Literature cited .............................................................................................................................. 125 Appendix 1 – Water chemistry definitions ................................................................................................... 128 Appendix 2.1 – Intensive watershed monitoring water chemistry stations in the Upper Mississippi River – Brainerd Watershed ..................................................................................................................................... 129 Appendix 2.2 – Intensive watershed monitoring biological monitoring stations in the Upper Mississippi River– Brainerd Watershed .......................................................................................................................... 130 Appendix 3.1 – Minnesota statewide IBI thresholds and confidence limits ................................................ 132 Appendix 3.2 – Biological monitoring results – fish IBI (assessable reaches) .............................................. 133 Appendix 3.3 – Biological monitoring results – invert IBI (assessable reaches) ........................................... 136 Appendix 4.1 – Fish species found during biological monitoring surveys .................................................... 139 Appendix 4.2 – Macroinvertebrate species found during biological monitoring surveys ........................... 140 Appendix 5 – Minnesota Stream Habitat Assessment Results..................................................................... 149 Appendix 6 – Lake protection and prioritization results .............................................................................. 151 Appendix 7 – Stream protection and prioritization results .......................................................................... 156 ii Figures Figure 1. The Intensive Watershed Monitoring Design. ............................................................................... 4 Figure 2. Intensive watershed monitoring sites for streams in the Upper Mississippi River-Brainerd Watershed..................................................................................................................................................... 4 Figure 3. Monitoring locations of local groups, citizens and the MPCA lake monitoring staff in the Upper Mississippi River-Brainerd Watershed. ......................................................................................................... 6 Figure 4. Flowchart of aquatic life use assessment process. ...................................................................... 10 Figure 5. The Upper Mississippi River-Brainerd Watershed within the Northern Lakes and Forest and North Central Hardwoods ecoregions of central Minnesota. .................................................................... 11 Figure 6. Land use in the Upper Mississippi River-Brainerd Watershed. ................................................... 12 Figure 7. Map of percent altered streams by major watershed (8-HUC). .................................................. 14 Figure 8. Comparison of natural to altered streams in the Upper Mississippi River-Brainerd Watershed (percentages derived from the Statewide Altered Water Course project). ............................................... 15 Figure 9. Statewide precipitation total (left) and precipitation departure (right) during 2016 (Source: DNR State Climatology Office, 2019) .................................................................................................................. 16 Figure 10. Precipitation trends in East Central Minnesota from 1997-2016 (left) and 1917-2016 (right) (Source: WRCC, 2018) ................................................................................................................................. 16 Figure 11. Precipitation trends in Central Minnesota from 1997-2016 (left) and 1917-2016 (right) (Source: WRCC, 2018) ................................................................................................................................