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Collection of links on the site.

http://www.flygrandrapids.org/SWStudy.php Grand Rapids International Airport Storm Water / Deicng Management Study

http://thornappleriver.org/ Thornapple River Watershed Council

http://thornapple.tripod.com/TREI/ Thornapple River Environmental Issues (an old site with some history of airport concerns)

http://damowners.org/ Thornapple Association (below Cascade Dam)

http://dnr.wi.gov/topic/invasives/fact/zebra.html Facts about Zebra Mussels

http://nas.er.usgs.gov/queries/FactSheet.asp?speciesID=5#imagemap More Facts about Zebra Mussels

http://dnr.wi.gov/aid/documents/ais/aisguide06.pdf Guide to Aquatic Invasive Species

http://water.weather.gov//ahps2/hydrograph.php?wfo=grr&gage=cldm4&view=1,1,1,1,1,1,1,1&toggles National Weather Service River Flow at Caledonia

http://waterdata.usgs.gov/mi/nwis/uv/?site_no=04117500&PARAmeter_cd=00065,00060 USGS River Flow at Hastings

http://waterdata.usgs.gov/nwis/dv/?dd_cd=01_00060_00003&format=img_default&site_no=04117500&set_logscale_y=1&begin_date=20080101 Chart of Daily Flow at Hastings

http://nwis.waterdata.usgs.gov/nwis/peak?site_no=04117500&agency_cd=USGS&format=img Chart of Annual Flows at Hastings

http://cfpub.epa.gov/surf/huc.cfm?huc_code=04050007 EPA Surf Your Watershed resource for the Thornapple River

GIS Mapping Services (requires Silverlight)  REGIS  AccessKent