Smoke 'em if you got 'em Traditional Cache

Standing at this location you will notice a smoke stack (I couldn't find any information on it but I assume it is for steam generation).  I was wonding how tall it was and found many ways to figure it out:

• You can use shadow ratio by using a know height (ie. yourself) and divide the height by the shadow lenth for a ration.  Muliply the stacks shadow with this ratio to get it's height (stack's shadow * your height) / your shadow = ~stack Height).
• You could find a stick the length of your arm. Hold your arm out straight with the stick pointing straight up (90-degree angle to your outstretched arm). Walk backwards until you see the tip of the stick line up with the top of the stack. Your feet are now at approximately the same distance from the stack as it is high (provided you are at she same ground level as the stack).
• You could estimate the height based of the door (standard door height is 6 feet 8 inches) or building heights (average story height is 10 ft)
• You could climb to top with stop watch. Begin timing your descent as you allow yourself to freely fall, taking care not to hit the side. Just as you land, stop timing yourself.  Solve the equation d = 4.9*t^2 where t is the time recorded by your stop watch and d is the distance you fell or equal to the height of the stack.

Lucky for you, nothing has to be figured out. Just find the cache. 

*  BYOP