5/5 Mystery Cache

The Geocache is not located at the above coordinates but is a good site to photograph the third falls.  The puzzle below uses these coordinates as the starting location for measured distances and angles to find the answers to the puzzles.  They will be referred to as "given coordinates".

~~WARNING: The terrain rating is a 5 and is dangerous - especially when it is wet or even damp.  The last rope at the final decent is starting to wear and when you rappel down you will lose footing near the bottom due to the convex in the rock face.  You must be able to pull yourself back up without much help from your legs - especially when the cliff is wet.
Bonnel Falls is a series of 4 water falls, very beautiful location and should be dedicated as a park.  One of the qualifiers for a 5 Difficulty rating is that you may need to make more than one trip.  This is such a great place that you will probably look forward to coming back.  It would be prudent to come out and assess what other equipment is needed or other alternatives before attempting any risky climbs.  I do not want the rating of this cache to be high due to poor coordinates.  These coordinates and the ones at each of the other 2 stages are very poor due to tree cover and slopes.  Each time I checked them they were out by up to 10 metres.  Hints and descriptions will hopefully make up for this problem.
The given coordinates are on a knoll, close to the 4th waterfall and is about 36 metres from the cliff with the two small ropes.  One of these ropes is a blue/green color.
The first stage is at: N49 A.B W124 12.C where:
A (2digits) = The molecular weight of the dominate element 4 metres at 340 degrees true, at the same elevation, from the given coordinates.
B (3 digits) = The molecular weight of the substance at the surface 11 metres at 225 degrees true from the given coordinates plus 784.
C (3 digits) = The total number of letters in the binomial scientific name of the predominate plants 5 metres at 100 degrees true from the given   coordinates plus 118.
The first stage is located at the coordinates found by solving the above puzzle.  It is about 4 metres off the path. The coordinates to find the final stage is in a camo'd pill bottle at this stage. Bring it to a safe area before even trying to open it.
The final stage is a camo'ed lock and lock hidden in a conventional way.  Turn off your GPSr when you approach the area. It should not be that difficult - you have been challenged enough.
There is no coordinate checker - remember it is a 5/5! Let me know if you find a problem such as a rope removed, the terrain altered etc. Good luck, perservere but keep safe.