People are always looking for maps of the river - so here ya' go :
http://www.geonames.org/maps/bkm11190
http://willih2o.files.wordpress.com/2010/01/new-shiawassee-river-map.jpg
http://tiny.cc/Shiawassee
https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEijNn6jaxg5dg94t1wLhdWUDzIspjMPrNjQ1p4Asrgvmnb9hnUEoAlTiyG05z_mrzt52Iq1T0gKhrXTi2d4Yp4zecFnxTng_X_WqHO3JaDd-qppsVpsIf0zPRn3GaNXu6OIQ6L3Uw/s1600-h/River+Map.jpg
http://www.headwaterstrailsinc.org/images/ShiawasseeRiverMap.jpg
http://www.headwaterstrailsinc.org/images/SE_Michigan_Inset_Map.jpg
http://shiawassee-river.blogspot.com/2007/10/map-for-shiawassee-river.html#links
http://shiawassee-river.blogspot.com/2008/10/maps-along-shiawassee-river.html
http://www.oakgov.com/peds/assets/docs/es_docs/rg_shiawassee_map.pdf
http://shiawassee-river.blogspot.com/2009/09/shiawassee-river-map.html
http://shiawassee-river.blogspot.com/2008/08/put-in-at-bush-park-in-fenton.html
I'm sure a few other maps exist, I'll keep looking and post them here
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