Careful! This GeoCache has been near this power station for a little while and it may hum! Really? Well, remember some of the stories we used to hear about bed springs humming when near power lines? Let’s examine this more carefully…
This is a major power sub-station that provides power for the eastern parts of Arapahoe, Douglas and Elbert counties. They act like circuit breakers, condition the power and remove spikes like when lightning strikes near, and will step down the voltage to be distributed to the users. The power lines coming in conduct 230 kilo volts of electricity! That’s pretty shocking, to use the pun! But what some folks wonder is, am I in danger being near these sub-stations or even the power lines for any amount of time? (Like when logging this GeoCache?)
I was curious so I did some research. One of the ways to measure electric fields is to use a meter that measures what we call EMF or Electro-Motive Force. It measure EMF in a unit called “Gauss”, to honor one of the major contributors Johann Carl Friedrich Gauss, a German mathematician and physical scientist.
And to put the Gauss into perspective, I measured the electric fields that exist in various parts of my house. If I measure the EMF near a standard incandescent light bulb it measures 2 milli-Gauss The EMF near a standard electric socket was almost 0. I was shocked (pun intended!) when I measured the EMF near my microwave oven – it went off the scale! (Over 199 mili-Gauss). Now that’s what I call nuking my food!
Well, you are probably wondering what the EMF measured at this power sub-station, here it is: the highest EMF field measured 12 mili-Gauss by the new towers, and the smaller towers measured 7 mili-Gauss. So, it is more dangerous for me to stand near my microwave while I nuke my food than to live near here, by over 20 times! Interesting!
So, to answer the question I raised in the title of this GeoCache, “Does this GeoCache hum?” The answer -- only when it doesn’t know the words!
Enjoy the cache!