Dam Remediation on the River Raisin<br />A Great Lakes Restoration Initiative Project<br />October 13, 2011<br />
River Raisin Watershed and AOC<br />
River Raisin Dam Remediation Project<br />Raisin AOC presents a unique opportunity for potential delisting (and therefore ...
Monroe Dams<br />City’s six low head dams (2.5-ft to 3-ft high) constructed by the Works Progress Administration – early t...
Phase 1 Project Area<br />Dams 6, 1, 2, 3 (reconnect 3.5 Miles)<br />Raisin River<br />Lake<br />Erie<br />
Phase 2 Project Area<br />Dams 4, 5, Waterloo, Grape(another 19.5 Miles)<br />Raisin River<br />Lake<br />Erie<br />
DAM 6<br />DAM 1<br />DAM 2<br />DAM 3<br />
Ecological Survey<br />Mussels<br />Did not find large presence of mussels<br />184 individual mussels were collected (11 ...
Ecological Survey (cont.)<br />Macroinvertebrates<br />In general, macro density was low<br />Samples are in the process o...
Natural Channel Design for Dams<br />Reconnecting Rivers by Luther Aadland, Minnesota DNR<br />http://www.dnr.state.mn.us/...
Benefits of Rock Arches<br />Varying velocities and water depths<br />Increased variety of habitat<br />Deep pools of wate...
Nashville Dam, Michigan<br />Rock Arches<br />
Dimondale Dam, Michigan<br />W-Weir<br />
Proposed Structure – Dam 6<br />
Proposed Structure – Dam 1<br />
Section/Profile<br />
Visualization of Rock Arch Rapids in Monroe<br />BEFORE…<br />AFTER…<br />
Four Critical Issueswith Dam Remediation Projects<br />Public perception<br />Sediment<br />Hydraulics<br />Invasive speci...
Public Perception<br />Has not been a major issue in City of Monroe<br />Active groups<br />River Raisin Public Advisory C...
Sediment<br />Has not been an issue in City of Monroe<br />Little or no sediment behind the low-head dams<br />Bedrock bot...
Hydraulics<br /><ul><li>Critical issue in City of Monroe
Perceived flooding concerns – existing vs. proposed
Dam 1 –HEC-RAS model shows 0.25-ft increase in 100-year water surface elevation (WSE)
Dam 6 – HEC-RAS model shows 0.01-ft increase in 100-year WSE
Modeling proposed conditions
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Organizing for Clean and Affordable Water

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The People’s Water Board is a coalition of labor, social justice, and environmental organizations based in Detroit. They work together to confront: 1) devastating lack of access to water faced by tens of thousands of low-income people who have had their water shut off; 2) water pollution due to aging wastewater infrastructure; and 3) the effort of corporate interests to gain control of Detroit’s water system. Listen to this panel discussion to learn about their struggles and victories.

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Organizing for Clean and Affordable Water

  1. 1. Dam Remediation on the River Raisin<br />A Great Lakes Restoration Initiative Project<br />October 13, 2011<br />
  2. 2. River Raisin Watershed and AOC<br />
  3. 3. River Raisin Dam Remediation Project<br />Raisin AOC presents a unique opportunity for potential delisting (and therefore attractive for potential Ph.2 funds)<br />EPA dredging combined with this project, along with Sterling State Park and other habitat restoration work could lift habitat impairments<br />Dam project will potentially be accomplished in two phases by 2013 and create fish and small boat access from Lake Erie to Dundee (~23 miles)<br />MDEQ working on strategies for other impairment delistings, recognizing that Monroe will remain an important shipping port for the forseeable future<br />Raisin AOC delisted 2015-2016?<br />
  4. 4. Monroe Dams<br />City’s six low head dams (2.5-ft to 3-ft high) constructed by the Works Progress Administration – early to mid-1930’s<br />Used to carry sanitary sewer over the river’s unique limestone bedrock and “beautify” downtown<br />Currently, only 4 dams carry active sanitary sewer<br />Waterloo Dam (owned by City) and Grape Dam (privately owned) are 5-ft to 6-ft high<br />
  5. 5. Phase 1 Project Area<br />Dams 6, 1, 2, 3 (reconnect 3.5 Miles)<br />Raisin River<br />Lake<br />Erie<br />
  6. 6. Phase 2 Project Area<br />Dams 4, 5, Waterloo, Grape(another 19.5 Miles)<br />Raisin River<br />Lake<br />Erie<br />
  7. 7. DAM 6<br />DAM 1<br />DAM 2<br />DAM 3<br />
  8. 8. Ecological Survey<br />Mussels<br />Did not find large presence of mussels<br />184 individual mussels were collected (11 species)<br />Low population is likely a result of impacted water quality and lack of suitable habitat<br />One state listed species of concern – Elktoe<br />Greatest occurrence upstream of Dam 6 and Dam 3<br />Most of the specimens were of larger size which suggests reproduction success is not great<br />
  9. 9. Ecological Survey (cont.)<br />Macroinvertebrates<br />In general, macro density was low<br />Samples are in the process of being identified<br />Field biologists believe higher quality taxa were present downstream of Dams 2 & 3 (more favorable substrate)<br />Aquatic Vegetation<br />No rare, threatened, or endangered species<br />Exotic/Invasive species present - Flowering rush & Purple loosestrife<br />
  10. 10. Natural Channel Design for Dams<br />Reconnecting Rivers by Luther Aadland, Minnesota DNR<br />http://www.dnr.state.mn.us/eco/streamhab/reconnecting_rivers.html<br />
  11. 11. Benefits of Rock Arches<br />Varying velocities and water depths<br />Increased variety of habitat<br />Deep pools of water for habitat<br />Creates flow patterns that minimize capture of ice and woody debris<br />
  12. 12. Nashville Dam, Michigan<br />Rock Arches<br />
  13. 13. Dimondale Dam, Michigan<br />W-Weir<br />
  14. 14. Proposed Structure – Dam 6<br />
  15. 15. Proposed Structure – Dam 1<br />
  16. 16. Section/Profile<br />
  17. 17. Visualization of Rock Arch Rapids in Monroe<br />BEFORE…<br />AFTER…<br />
  18. 18. Four Critical Issueswith Dam Remediation Projects<br />Public perception<br />Sediment<br />Hydraulics<br />Invasive species<br />
  19. 19. Public Perception<br />Has not been a major issue in City of Monroe<br />Active groups<br />River Raisin Public Advisory Council (PAC)<br />River Raisin Institute (RRI)<br />River Raisin Watershed Council (RRWC)<br />Monroe Commission on the Environment (COTE)<br />Ongoing communication<br />Public meetings<br />Updates to Monroe COTE<br />Project Website: www.ci.monroe.mi.us/RRP_description.cfm<br />
  20. 20. Sediment<br />Has not been an issue in City of Monroe<br />Little or no sediment behind the low-head dams<br />Bedrock bottom<br />“Numasepee” – River of Sturgeon<br />
  21. 21. Hydraulics<br /><ul><li>Critical issue in City of Monroe
  22. 22. Perceived flooding concerns – existing vs. proposed
  23. 23. Dam 1 –HEC-RAS model shows 0.25-ft increase in 100-year water surface elevation (WSE)
  24. 24. Dam 6 – HEC-RAS model shows 0.01-ft increase in 100-year WSE
  25. 25. Modeling proposed conditions
  26. 26. Obstructions
  27. 27. Ineffective flow areas
  28. 28. 1-D vs. 3-D</li></li></ul><li>Modeling Plan<br />Refine flood plain sections with LIDAR (light detection and ranging – high resolution mapping)<br />Non-destructive testing to see if we can partially notch top of dam without damaging sewer<br />Expert opinion (Army Corps and Dr. Hubert Chanson) - HEC-RAS may not appropriate model for these structures<br />Problems simulating energy loss in 1D, both for proposed and existing conditions<br />Developing 3D model of existing and proposed conditions<br />
  29. 29. Invasive Species<br />Will this be an issue in City of Monroe?<br />Risks vs. benefits<br />Create passage for desired species<br />Restore river to more natural condition<br />Increase in species diversity<br />Potential to allow passage of invasive species<br />Ongoing research – so far, consensus that positives outweigh the negatives<br />
  30. 30. Breakout Session – Critical Issues<br />Public perception<br />Sediment<br />Hydraulics<br />Invasive species<br />How might these four critical issues apply to projects across the Great Lakes? <br />Are there additional concerns not already mentioned that might be associated with these issues?<br />What are some potential solutions?<br />
  31. 31. Questions?<br />Dan Stefanski<br />Monroe County<br />734- 240-3101 <br />dan_stefanski@monroemi.org<br />Barry LaRoy, PE<br />City of Monroe<br />734-384-9122<br />barry.laroy@monroemi.gov<br />Richard Micka<br />River Raisin PAC<br />734-242-0909<br />rgm@core.com<br />Scott Dierks, PE<br />Cardno JFNew<br />734-222-9690<br />scott.dierks@cardno.com<br />Michelle LaRose, PE<br />Cardno JFNew<br />734-222-9690<br />michelle.larose@cardno.com<br />

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