Keywords: Michigan 231 Map.png M-231 in Ottawa County Michigan as it will appear when completed Road course was digitized using visible features in the 2014 NAIP imagery as well as supporting documents from MDOT listed below own <br/>Data Sources http //nhd usgs gov/data html High Resolution NHD - U S Geological Survey - February 2015 http //www mcgi state mi us/mgdl/ action thm Michigan Geographic Data Library - MI Geographic Framework All Roads v14a - Sep 2015 http //www mi gov/documents/mdot/MDOT_I-96_M-231_interchange_411092_7 pdf I-96/M-231 Interchange Construction - MDOT - 16 Sep 2015 http //www michigan gov/documents/mdot/US-31_Bypass_Public_Meeting_Presentation_9-22-10_337279_7 pdf M-231 Public Meeting Documents - MDOT - 22 Sep 2010 USDA 2014 NAIP 1m Orthoimagery for Michigan QGIS Stratosphere 2015-09-16 StratosphereMap Road maps of Michigan |