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Rapid River Sediment Issue - Northern Michigan


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Rapid River Sediment Issue - Northern Michigan

  1. 1. Rapid River <ul><li>2011 Activities </li></ul><ul><li>November 9 </li></ul><ul><li>ESLA </li></ul>
  2. 2. Issue: Increasing Sediment 1993 – Aarwood to Torch River
  3. 3. Issue: Increasing Sediment 2005 – Aarwood to Torch River
  4. 4. Objectives for 2011 <ul><li>Conduct semiannual macroinvertebrate collections at an increasing number of sites </li></ul><ul><li>Walk the river and identify major erosion sites </li></ul><ul><li>Establish multiple ongoing data collection sites </li></ul><ul><li>Evaluate Road Crossings </li></ul>
  5. 5. 2009 – 2011 Macroinvertebrate Results <ul><li>West of Aarwood Bridge – Fair (2010) </li></ul><ul><li>East of Aarwood Bridge – Fair (2010) </li></ul><ul><li>West of Freedom Park – Good (2011) </li></ul><ul><li>East of Freedom Park – Fair/Poor (2009) </li></ul><ul><li>East of Kellogg Bridge – Fair (2011) </li></ul><ul><li>East of Underhill Road – Poor (2010) </li></ul><ul><li>Seven Bridges – Good (2011) </li></ul><ul><li>Wood Road west of Rugg Pond – Fair (2011) </li></ul><ul><li>Wood Road northeast of Rugg Pond – Poor (2011) </li></ul><ul><li>Birch Street northeast of Rugg Pond – Poor (2011) </li></ul>
  6. 6. Walking the River <ul><li>The ESLA Teams walked the length of Rapid River from Rugg Pond to Torch River. </li></ul><ul><li>The length of this stretch by Valley Road is 8.1 miles, but walking the meandering River is probably twice that length or more. </li></ul><ul><li>Other than road crossings, only two erosion sites were identified as caused by human intervention, both in the 7 Bridges area. </li></ul><ul><li>Other erosion was natural and minor, such as under cutting of banks – vegetation on the banks was very heavy throughout this stretch of the River. </li></ul>
  7. 7. Establish Ongoing Data Collection Sites <ul><li>Transducer placed at the Rapid City Road crossing – collects water level and temperature data every 30 minutes 24 hours a day. </li></ul><ul><li>4 staff gauges installed - Freedom Park, Wood Road NW, Seeley Road, and 131 Bridge – periodic measurements at these sites include water level, water velocity, suspended sediments, and dissolved oxygen. </li></ul><ul><li>Temperature loggers also installed at the above sites, plus Hansen Road and west of Aarwood Bridge. </li></ul>
  8. 8. Road Crossing Evaluations <ul><li>* Aarwood Rd not evaluated anticipating replacement </li></ul>All road crossings below Rugg Pond completed and most of those above Rugg Pond Major erosion issues were found at all road crossings below Rugg Pond except at Rapid City Road* Examples follow
  9. 11. Road Crossings
  10. 15. <ul><li>We are just beginning and must be diligent in collecting </li></ul><ul><li>systematic data over time </li></ul><ul><li>Macroinvertebrate data indicates that fish habitat is less than </li></ul><ul><li>desired </li></ul><ul><li>There are not serious human causes of erosion (sand </li></ul><ul><li>deposits) below Rugg Pond other than road crossings </li></ul><ul><li>We need to collaborate with Kalkaska Townships, </li></ul><ul><li>County Commissioners, and Road Commission </li></ul>