Tennessee 811 Newsletter
"The Underground Scoop"
June / July 2009 - Early Summer Edition
In This Issue
Sign Up
Quick Links
NewestLogo

Tennessee One Call will periodically provide timely information in this newsletter about events happening at the call center, or issues related to the "One-Call Industry".

Lewisburg Mayor
County Mayor, Jo Boyd Liggett, signs proclamation for month of April as 811 Call-Before-You-dig month.

Whether you are planning to do it yourself or hire a professional, smart digging means calling 811 before each job.

Homeowners often make risky assumptions about whether or not they should get their utility lines marked, but every digging job requires a call - even small projects like planting trees and shrubs. The depth of utility lines varies and there may be multiple utility lines in a common area. Digging without calling can disrupt service to an entire neighborhood, harm you and those around you and potentially result in fines and repair costs. Calling 811 before every digging job gets your underground utility lines marked for free and helps prevent undesired consequences.

Shown in photo above, right to left :Craig Blackwell (Lewisburg Gas Department), Tommy Whaley (Marshall County Board of Public Utilities), Kenneth Carr (Lewisburg Water & Wastewater), Scott Holder (811 Liaison), Richard Turner (Lewisburg Electric System), Ron Aldridge (Duck River Electric Corporation)
Meeting
Tennessee 811 offers free safety meetings at your office or work site.

We don't restrict the hours - we can come to you before your crews go out in the morning, during lunch or when they come back in the afternoon. We work around what works for you! We can tailor the time frame of the presentation to suit your meeting needs

Call or email now and ask for Holly Austin or Scott Holder and we will set you up.
Holly - haustin@tnonecall.com - 615-367-1110 (x7102)
Scott - sholder@tnonecall.com - 615-367-1110 (x7140)

"Call Before You Dig" is a great safety topic for any meeting. Even your inside personnel can benefit.

Remember - there is no cost involved to you, and it's a service we offer. The better educated your employees are, the safer they will be.
GPS Circles
We thought it might be interesting to run a series about how GPS works. The content for this series comes directly from the Discovery channel's "How Stuff Works" programs via their website. So, sit back and enjoy the read.

This article begins the 2nd topic in the series.


2-D Trilateration

Imagine you are somewhere in the United States and you are TOTALLY lost -- for whatever reason, you have absolutely no clue where you are. You find a friendly local and ask, "Where am I?" He says, "You are 625 miles from Boise, Idaho."

This is a nice, hard fact, but it is not particularly useful by itself. You could be anywhere on a circle around Boise that has a radius of 625 miles

You ask somebody else where you are, and she says, "You are 690 miles from Minneapolis, Minnesota." Now you're getting somewhere. If you combine this information with the Boise information, you have two circles that intersect. You now know that you must be at one of these two intersection points, if you are 625 miles from Boise and 690 miles from Minneapolis. .

If a third person tells you that you are 615 miles from Tucson, Arizona, you can eliminate one of the possibilities, because the third circle will only intersect with one of these points. You now know exactly where you are -- Denver, Colorado.

This same concept works in three-dimensional space, as well, but you're dealing with spheres instead of circles. In the next issue, we'll look at this type of trilateration.

Brain, Marshall, and Tom Harris. "How GPS Receivers Work." 25 September 2006.
HowStuffWorks.com. 10 March 2009.
Photo courtesy U.S. Department of Defense Artist's concept of the GPS satellite constellation

Tennessee 811

phone: (615) 367-1110
Email Marketing by