Welcome to the "Adventures Paddlesport Whitewater Expedition (AP WE) : Grand Canyon of the Colorado River (USA AZ NV) " image gallery by Bob Obst and Dr. Colleen E. Hayes! Unless noted otherwise on a specific image-photo, Robert Arthur Obst (Bob Obst) or Dr. Colleen E. Hayes captured all of the high resolution images within this gallery. IF used for non-commercial purposes, you may share these copyrighted images with others without restriction. However, to obtain-use an image for commercial and/or personal purposes with NO copyright mark and NO author-photographer's credit on it, please purchase it here (copyright purchased). For more images like this, go to http://www.robertarthurobstphotos.com/Adventures-Paddlesport or the "AdventuresPaddlesportFAVO" sharegroup at http://www.robertarthurobstphotos.com/share/qhtAksmPqRtj6 or CanoeKayakWhitewaterRacingO at http://www.robertarthurobstphotos.com/share/UCsDA727pe6Fg . Questions-feedback, contact Bob Obst at r.obst@att.net, mobile 608-658-6116. Enjoy the "Adventures Paddlesport Whitewater Expedition (AP WE) : Grand Canyon of the Colorado River (USA AZ NV)" images by Bob Obst and and Dr. Colleen E. Hayes!. THANKS for your interest ! PERSONAL REFLECTIONS 1983: Exploring the Colorado River within Grand Canyon National Park http://www.nps.gov/grca/index.htm was a magnificent experience. During September of 1983 - during a trip organized by the Nantahala Outdoor Center http://www.noc.com/ - Bob Obst canoed through most of the Grand Canyon - with the exception of Crystal Rapids - with his tandem, decked canoe partner Dr. Colleen E. Hayes. Bob's father - Robert J. Obst - was on a raft. During September 1983 water flow through the "Grand Canyon" ranged 25-30,000 CFS during our entire 3 week adventure. NOTE: During the Summer of 1983, water flow through the Grand Canyon was at record highs - ranging 25,000 to 92,600 CFS with the 92,600 CFS peak occurring on 6/29/1983. Some rapids - such as Crystal Rapids and Lava Falls - were rated class 4+ on a six point (international) scale. Although not as difficult as other rivers Bob has paddled, the Grand Canyon - with its powerful rapids, unending spectacular vistas, amazing side-canyon hikes, and colorful inner gorges - was one of the most memorable. ; ADDITIONAL REFERENCES: Nantahala Outdoor Center at http://www.noc.com/ , Grand Canyon National Park at http://www.nps.gov/grca/index.htm, Grand Canyon Field Institute (GCFI) Grand Canyon interactive map at http://www.grandcanyon.org/fieldinstitute/aboutus.asp, Grand Canyon 3-D Geologic Tour http://www.durangobill.com/GrandCanyonTour.html, Colorado River rapids and features at http://en.wikipedia.org/wiki/List_of_Colorado_River_rapids_and_features and USGS online water flows through Grand Canyon http://waterdata.usgs.gov/usa/nwis/uv?site_no=09380000 RAO