The cache is not at the posted coordinates, but it is close. Limited parking is available at the end of Knollwood Ct. Please be very discrete when parking in this neighborhood and visiting this area!
To determine the location of the cache, go to the man-made object at the posted coordinates. There are rows of rectangles that traverse the object from one side to the other. Starting from the outermost/top row, count the number of rectangles in each row.
The number of rectangles in the First (outermost) row = A
The number of rectangles in the Second row = B
The number of rectangles in the Third row = C
The cache is located at:
N 40° 37.B4C W 074° 23.1A1
CHECKSUM for A + B + C = 21
You can check your answers for this puzzle on Geochecker.com.
Congratulations to avgraphics on his 150th FTF!