Rio de Flag
A collection of diverse resources gathered for the Spring 2002 Field Trip Series

sponsored by the Arizona Humanities Council and the Arizona Historical Society.

Coconino County Hospital (1907)

Button Flagstaff Pioneer Museum

Button Bill Gaud's NAU Resource

Army Corp of Engineers, FINAL ENVIRONMENTALTAL IMPACT STATEMENTThe City of Flagstaff is located in southern Coconino County approximately 150 miles north of Phoenix. Flagstaff is surrounded by the Coconino National Forest, an area that contains a large number of natural, scenic, and recreation attractions. Due to its 7,000-foot elevation, Flagstaff experiences heavy snowfall during the winter and mild temperatures during the summer.

The Rio de Flag is a tributary of the San Francisco Wash, which feeds into the Little Colorado River. Originating on the southwestern slopes of the San Francisco Mountains north of Flagstaff, the Rio de Flag flows over various types of terrain: the wide, flat valleys of the Fort Valley region; the steep, narrow canyons north of Flagstaff, and the wide, flat-bottomed canyons southeast of Flagstaff. The total drainage area of the Rio de Flag watershed is approximately 116 square miles. The total drainage area above the Flagstaff city limits is roughly 50 square miles. The elevation of the drainage area as a whole ranges from approximately 12,356 feet to 6,800 feet.

Sinclair Wash and Clay Avenue Wash originate southwest of Flagstaff on the slopes of Woody Mountain. Sinclair Wash flows northeast to its confluence with Rio de Flag just south of the O'Leary Road/Lone Tree Road intersection.

Clay Avenue Wash flows west from Observatory Mesa, joining the Rio de Flag (via an underground culvert) near the intersection of Butler and San Francisco Streets. Other smaller tributaries to Rio de Flag within the city limits are Penstock Avenue Wash, Peaceful Valley Wash, Country Club Wash, Fanning Drive Wash, Switzer Canyon Wash, Spruce Avenue Wash, West Street Wash, Bow and Arrow Wash, and Peak View Wash.

--- from U.S. Army Corps of Engineers Draft Feasibility Report
and Environmental Impact Statement, June 2000
FINAL 2006 Report as PDF available HERE

Resources ...
Joe Meehan Button NAU LumberJack: Redirecting the Rio

Button NAU LumberJack: Urban Decay

Button NAU LumberJack: Rio Faces ReŽngineering

San Francisco Peaks and Boulevard Button Fort Valley Experiment Station and
San Francisco Peaks WebCam


High Altitude Image of Museum of Northern Arizona Button USGS High Altitude Images
(image to the right is centered on the Museum of Northern Arizona)


Fort Moroni Button Historic Photos of Rio de Flag


USGS Topo of Flagstaff West Button Maps of Rio de Flag
Benchmark at Flagstaff Center Button Jim Woodward's Surprise
Now we know what that falling down wall behind
the 'Tourist Home' is ...
Stone Landmarks Button Stone Landmarks
by Marie Jackson

Available at the MNA bookstore
(10% discount for members)


Guide to the Beale Road Button Guide to the Beale Road through Flagstaff
by Jack 'Beale' Smith

Available at the Pioneer Museum bookstore


David Wilcox, MNA Chief Archaeologist  


David Wilcox's Photo Log
of the Rio de Flag channel ...

Additional Links to Natural History of Flagstaff ...
  Button Museum of Northern Arizona
  Button USGS Flagstaff Field Center
  Button San Francisco Volcanic Field
  Button Hart Prairie Preserve
  Button USGS Rocky Mt Mapping Center
  Button NAU Cline Library Image Database
  Button County GIS Office Interactive Mapping Site
  Button ARIA Aerial Imagery and Topos
ALL 7.5 Min topos and USGS High Altitude Images FREE and ONLINE !
  Button NOAA Flagstaff Weather

Click here to eMail the WebMaster Kent Hendrick