20250505 23215900 1.0 TRUE GrandCanyonBaseLayers The US Geological Survey’s Grand Canyon Monitoring and Research Center (GCMRC), formally established in October of 1996, measures effects of Glen Canyon Dam operations on the resources along the Colorado River from Glen Canyon Dam to Lake Mead. As the science provider to the Glen Canyon Dam Adaptive Management Program (GCDAMP), GCMRC designs and implements scientific studies to meet the objectives put forward by resources managers of the GCDAMP. In addition to its role as the science arm of GCDAMP, GCMRC is also responsible for disseminating both the data collected in support of science objectives as well as the results of the studies conducted. This online service provides base GIS layers most commonly used by the U.S. Geological Survey's Grand Canyon Monitoring and Research Center. The data sets available through this service include GCMRC's river mile system, locations and names of river rapids, tributaries and other geographic place names. Colorado River GCMRC Grand Canyon Map Service River Miles Tributaries USGS This online service provides access to base GIS layers most commonly used by the U.S. Geological Survey, Grand Canyon Monitoring and Research Center in support of science activities along the Colorado River in Grand Canyon. Republished as a map and feature service using Stateplane Arizona Central (NAD83 2011), no vertical coordinate system defined. USGS, GCMRC None iVBORw0KGgoAAAANSUhEUgAAASwAAADICAYAAABS39xVAAAAAXNSR0IB2cksfwAAAAlwSFlzAAAO xAAADsQBlSsOGwAAAqpJREFUeJzt1DENADAMwLAd5U+5o7BvimQjyJXZ3T0AAfM7AOCVYQEZhgVk GBaQYVhAhmEBGYYFZBgWkGFYQIZhARmGBWQYFpBhWECGYQEZhgVkGBaQYVhAhmEBGYYFZBgWkGFY QIZhARmGBWQYFpBhWECGYQEZhgVkGBaQYVhAhmEBGYYFZBgWkGFYQIZhARmGBWQYFpBhWECGYQEZ hgVkGBaQYVhAhmEBGYYFZBgWkGFYQIZhARmGBWQYFpBhWECGYQEZhgVkGBaQYVhAhmEBGYYFZBgW kGFYQIZhARmGBWQYFpBhWECGYQEZhgVkGBaQYVhAhmEBGYYFZBgWkGFYQIZhARmGBWQYFpBhWECG YQEZhgVkGBaQYVhAhmEBGYYFZBgWkGFYQIZhARmGBWQYFpBhWECGYQEZhgVkGBaQYVhAhmEBGYYF ZBgWkGFYQIZhARmGBWQYFpBhWECGYQEZhgVkGBaQYVhAhmEBGYYFZBgWkGFYQIZhARmGBWQYFpBh WECGYQEZhgVkGBaQYVhAhmEBGYYFZBgWkGFYQIZhARmGBWQYFpBhWECGYQEZhgVkGBaQYVhAhmEB GYYFZBgWkGFYQIZhARmGBWQYFpBhWECGYQEZhgVkGBaQYVhAhmEBGYYFZBgWkGFYQIZhARmGBWQY FpBhWECGYQEZhgVkGBaQYVhAhmEBGYYFZBgWkGFYQIZhARmGBWQYFpBhWECGYQEZhgVkGBaQYVhA hmEBGYYFZBgWkGFYQIZhARmGBWQYFpBhWECGYQEZhgVkGBaQYVhAhmEBGYYFZBgWkGFYQIZhARmG BWQYFpBhWECGYQEZhgVkGBaQYVhAhmEBGYYFZBgWkGFYQIZhARmGBWQYFpBhWECGYQEZhgVkGBaQ YVhAhmEBGYYFnIoLreIHHblfYqUAAAAASUVORK5CYII=