How you solve this cache may require different approaches as time passes, in fact this cache is now in its second generation. Please stay in places that are safe and open to the public. The terrain rating is consistent with that.
At the main coordinates listed for the cache you would have found something essential to solving the puzzle - as the site has evolved that object has now disappeared. Images of it have now been posted.
There are also nine additional points for this cache lettered A-I. Each of these nine points will have something in common with one another, and this common thing will help you find a number for each. Once you have worked out the numbers substitute them in the following to determine the location of the final.
J is different - but not very different.
N 38 degrees A(E+F).(A+B)(C-E)(E-D)
W 77 degrees JG.(H-B)B(I-E)
Final is a nano.
You can check your answers for this puzzle on GeoChecker.com.
Congrats to Serrabou and Engalaand on the FTF and the persistence to get it.
Potomac Yards development continues. Latest cache in the Potomac Yards Park (PYP) series. Hope to add more as the trail becomes a reality.
See below for info about the park.
The WashCycle
Alexandria City