22-Sep-2001 -- The closest we could get with a vehicle to 45N-101W
(10.4 miles East of Eagle Butte, Dewey County, Cheyenne River Indian Reservation, SD) was a little over 1 mile. We started at about 10 AM. The terrain was rolling prairie grazing land with some small rolling ravines but also 4 very steep and deep draws running in a N-S direction. We had to walk almost due west from the vehicle and these deep draws were significant, to say the least, for the horizontal distance to be covered.
We were operating with 2 GPS's. When we arrived at the site, both GPS's agreed almost perfectly--a variation between the two of only 5-10 feet.
At this time of day the sky was clear blue with brisk NW winds at 25-30 MPH. Cows were present in two different herds--one in a steep draw and one herd that approached us with curiosity at the site.
The site was near the top of a small rolling ravine, grassy and with some of the prairie wild flowers. The ravine was oriented NW to SE. The site was about 200 feet south of an E-W fence line .
We spent about 30 minutes at the site, enjoying the great view to the SE, taking the necessary digital pictures and keeping an eye on the herd of cows (with the possibility of a bull). Then, the arduous trip, (up & down)
back to the vehicle.