Tribute to the ancients: The portage Mystery Cache

This cache is not at the posted coordinates.  The terrain is
fairly flat, but low, rasberry bushes and thorn trees are common so wear appropriate clothing and footwear.

New calculation...no more projection.

The cache container is a camo'd tobacco can with logbook, pencil
and sharpener. It contains info cards on the Petitcodiac river and
the aboriginal peoples of the region. Feel free to take one, no
trade needed for them, that's why there's multiple copies. This is
a theme cache, please trade with that in mind. There are some
modern arrow components, themed key chains and an interesting TB
that sparked the idea of this cache.

Find a cairn erected many years ago to mark a local portage used by the Aboriginal people as
well as European settlers on the North side of the Homestead road.  Park at N45 57.259 W65 10.079 to access the historic site. 

Proceed on foot to the Cairn, The cairn was placed here many years ago as many were placed around the province to honor places and people, many of them in front yards now.  Take the time to find them and find out more about them, that's why they are there.

Take a SEED waypoint while standing directly in front of it (arms length should work ok), and calculate a new
waypoint using data from the plaque and neighboring civic addresses. 

NORTH Coordinate calculation:

Take the civic address from the house directly behind the monument.  Using only the first two digits, subtract 4.  Precede this with a "0" and replace the last 3 digits of the North coordinate with your answer..

N45 AB.0( first 2 digits of civic address - 4 )

West Coordinate calculation:

From the plaque on the cairn, take the the year the monument was dedicated.  Using only the last two digits, add 139.  Replace the last 3 digits of the West coordinate with your answer..

W065 XY.(last 2 digit of year placed + 139 )

 Additional info:
http://www.petitcodiac.org/riverkeeper/english/The_Petitcodiac/histvalues.html