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Mutual Help List, Question concerning control tower equation

Title: RE: Mutual Help List, Question concerning control tower equation


Here’s a link that has a lot of good information about the contract tower program, including links to other sites that are helpful:


If your airport isn’t already a member, the CTA web site http://www.contracttower.org/ is also a good source of information.

The equation you’re referring to is the “benefit/cost ratio” (B/C ratio).  If it’s 1.0 or above, your airport is eligible for FAA support of a contract tower.  If it’s below 1.0, the airport and FAA can enter into a cost-sharing agreement.

As I recall, the formulas/factors/values that go into calculating the B/C ratio used to be a secret, FAA was for some reason reluctant to release them til AAAE/CTA finally convinced the Feds to release them.  Spencer Dickerson at AAAE/CTA might be able to help you with that.

Good luck!

Semper Fi

-----Original Message-----
From: help-owner@xxxxxxxxxxxxxxxxxxxxxx on behalf of Richard.Stein@xxxxxxxxxxxxxxx
Sent: Wed 4/3/2013 9:20 AM
To: help@xxxxxxxxxxxxxxxxxxxxxx
Subject: CAA: Mutual Help List,  Question concerning control tower equation

Everyone -

I have a question about equation that the FAA uses (or use to use) for
determining if a control tower would be considered for an airport.

Background - Lynchburg Regional Airport is losing its contract control
tower next month.  We're currently examining several options, including
asking the state to use our entitlement funding to continue to operate the
control tower for a few months until a permanent solution is found.  One
of the questions from the Aviation Board was "Why are Air Carrier
operations more important in determining if we get to keep our control

One piece of the answer is an equation I remember from college that used
airline operations, general aviation operations and some other operations
to get a result.  If the result was over a certain number - you were more
likely to get a tower.

That class was over 25 years ago - I'm glad I remember the equation at

My question:  What was the equation for determining having a control

Any comments would be appreciated, also feel free to email or call with
any questions or comments about the tower closure issue.

Richard M. Stein, A.A.E.
Deputy Airport Director, Operations and Maintenance
Lynchburg Regional Airport
350 Terminal Drive, Suite 100
Lynchburg, VA  24502
(434) 455-6088
(434) 239-9027 (fax)


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