My Carpenter bee

Found this hole under the carport and found a big 'bumble bee looking' bee eating a hole.
Cannot get a pic of the bee, too fast, but I'm sure it's a Carpenter bee.

This is the saw dust she is chewing out of a perfect 1/2 " hole. The hole goes in 1" then turns right and is about 2" longer. This is what I found on Carpenter bees:
......................................................
Carpenter bees feed on pollen and nectar and are important pollinators of flowers and trees.The males are not long lived, and the female carpenter bee prepares the nest. Gallery construction is a time- and energy-consuming process, and the female will preferentially refurbish an old nest rather than excavate a new one. When constructing a new nest, the female uses her strong jaws (mandibles) to excavate a clean-cut, round nest entrance hole on the lateral surface of wood in an exposed or unexposed location. This hole is slightly less than 1/2-inch wide, approximately the diameter of her body. She bores into the wood perpendicular to the grain for one to two inches then makes a right angle turn and excavates along the wood grain for four to six inches to create a gallery (tunnel). She excavates the gallery at the rate of about one inch in six days.
.............................................................
So I will let her do her thing and my garden will benefit from the offspring.

Yes, definitely looks like a carpenter bee hole. I don't know how often you go in and out of the carport, but I had some in my patio a few years ago and the male gets a bit aggressive at some point during the year--I don't know if it's during mating season or what, but I found myself unable to use my patio much because he would dive-bomb my head anytime I'd go out there. Never got stung, but it was definitely not fun! After the activity died down that year I painted all the wood in the patio cover frame--supposedly they won't make homes in wood that's been painted, never had trouble with them after that. I know they're beneficial so I didn't really object to having them around, but they made my patio unusable for a few months so I was hoping they'd find another place to nest.

Rentman: The more you have the more you will get. Any insect is this way. If you let one cockroach stay you will have more! The young when they go to nest will not go far from the original. Not to mention the weakening of the board she is hollowing out for you. I don't know that I would kill the bee but maybe just fill her hole with caulk and shooo her away as often as possible. Provide a log or some scrap wood out near your garden and she will find it especially if you saw into the desired nest site a little. They are attracted to fresh cut lumber for some reason. If you find more holes just fill them in and she will get the hint shortly.

My 'time share' boys were over yesterday and they are deathly afraid of any type bee. The male (which doesn't dig the hole) was buzzing them, but I've read the male has no stinger.
I will try and put up with it.

Thanks for the info, gcorrier

Only thing that worked for me to get rid of them was painting the wood around the patio--if I filled in holes they just made new ones, and there was plenty of other wood around in the garden that they could have used but for some reason they liked the patio framing.