As a person who's familiar with Arvada's animal control, I would highly suggest covering all your bases. I find Arvada's AC unit very... intolerable and in need to check their own facts. Just to make things easier for yourself, I would call DOW and ask what their regulations on snakes, more specifically corn snakes are. Make sure to note who you speak to and when. They'll probably want to know why you're calling them to ask about city and county regulated issues, but just state that you want to make sure you have all the information you need. Also, ask them if there is another place they would recommend calling besides your local county and city in regards to breeding.
If they give you any numbers, give them a call and go through the same thing (note who you talk to and when). Then, call Jefferson County, which is the county I assume you're in. Find their animal regulation department and ask what the requirements are within the county for acquiring a breeding license. Then do the same with Arvada's animal department.
Make sure all the information matches as closely as possible from each source. DOW will have more general information, but Jefferson County and Arvada codes should be more specific. For example, most of Jefferson County Lakewood accepts ownership of snakes over seven feet. Wheat Ridge, if I remember correctly, could give a flying squirrel's rear end about the size of the animal. Arvada has a limit of six feet (they tried to take my black rat snake because he's about that size).
If asked, I would suggest saying you have one snake at most. I remember reading here (I think) about people getting into a pickle for "all ready" having the snakes before getting licenses. They may want to do a home check, so make sure that you have everything in order house-wise. If you rent, you'll want to get your landlord's written permission, just in case.
Other than that, I'm sure it will be pretty straightforward. I'm no longer getting home checks from animal control (knock on computer) even though they were supposed to go for a year. Just be aware that Becky, one of the officers can be really frustrating. She changes her mind every time she sees you about what is acceptable and what isn't. She tried to convince me last time I saw her that my snakes needed a more stimulating environment (out of tubs). I argued with her about the fact that most of my snakes would go to two places even if they had cages the size of my reptile room and the two that actually moved around are in actual tanks anyway.
There is another officer, I can't remember her name, but she takes everything really literally. When asked to give a count of the animals I had at the time, I listed them all and then said "I also have a colony of stupid ants living in my bathroom, but I didn't ask for them and they won't leave". I thought I was being funny. Guess I wasn't and I was asked to show them. So I did and I was asked why they were kept in the bathroom. 0_o
