the Degree Confluence Project

United States : Arizona

3.3 miles (5.3 km) SW of Fort Thomas, Graham, AZ, USA
Approx. altitude: 883 m (2896 ft)
([?] maps: Google MapQuest OpenStreeMap topo aerial ConfluenceNavigator)
Antipode: 33°S 70°E

Accuracy: 3 m (9 ft)
Quality: good

Click on any of the images for the full-sized picture.

#2: View West #3: View North #4: View East #5: GPS Position #6: Ground Cover #7: Transportation at intersection on way out #8: TerraSync/Pathfinder Office Post Processed Data

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  33°N 110°W (visit #4)  

#1: Looking South towards Mt Graham

(visited by Shawn Fleming)

11-Apr-2015 -- My wife and I decided it was time to take a Bolder and Fresher trip to Albuquerque for the weekend and it would be a great opportunity to visit a couple confluences along the way.

This confluence was last visited almost 10 years ago. In Fort Thomas, we turned west off Highway 70 and onto Black Rock Road here and then continued west onto the dirt Black Rock road here and then south onto a smaller dirt track here and continued across a small wash and beyond until we parked just over 500 meters north of the confluence.

It’s pretty cool that you can now link to free Google Street View images! Click on the first two links above to see what I mean. I remember when linking to TerraServer images in narratives 10 years ago was cool and useful – now TerraServer charges outrageous prices for publically available data!

I set out on foot and navigated over hard sandy ground and through some small washes to a large circular field approximately 580 meters in diameter surrounded by a barbed wire fence. The confluence itself was easily found about 25 meters south of the northern edge of this field on very flat ground.

I did my standard data collection routine – data logging with TerraSync, taking lots of pictures, and sending a Spot message before I headed back.

Post processing of the GPS data reveals that my GPS receiver was 2.3 meters southwest of the actual confluence with a Horizontal Precision of 1.9 meters. From where we parked, my total round trip hike time was 32 minutes and 1.2 km. It was 1 hour total with 12 km of driving from Highway 70 in Fort Thomas.

On our way back we visited 33N 109W.

 All pictures
#1: Looking South towards Mt Graham
#2: View West
#3: View North
#4: View East
#5: GPS Position
#6: Ground Cover
#7: Transportation at intersection on way out
#8: TerraSync/Pathfinder Office Post Processed Data
ALL: All pictures on one page

At Fort Thomas, turn right onto Black Rock Rd. Immediately cross the Southern Pacific railroad tracks, and the Fort Thomas Canal. Go 1.6 miles on this road, cross Browns Circle and immediately come to Sanders Road/Hog Holler Road. At this point you have a choice:

Approach 1: Continue 0.87 miles on Black Road Rd., crossing over Fine Wash. Take a left onto an unnamed road, and cross over Fine Wash again. Go 0.93 miles to the end of this road. The confluence is located 2000 feet south-southeast of this point. (True bearings. Adjust for a magnetic compass).

Approach 2: Turn left onto Sanders Road/Hog Holler Road and go 0.87 miles to the end. Walk 900 feet due south to Black Rock Wash. Walk 2400 feet up the wash (southwest), and then walk 3700 feet due west to the confluence.

Depending on the terrain, it could be very difficult to maintain an accurate position with this one because of the lack of mapped landmarks.