Permission from gov agencies

Hello All,

In setting up Tree Climbing Colorado, I will be reaching out to various government agencies for permission. I have read previous posts on demo climbs, waivers, etc. What I'm looking for are in-writing approvals, preferable on gov letterhead, that anyone out there has. This way, I can contact the regional or local office, and have a positive precedent to show them. Anyone have something in writing from a gov agency rep? Thanks.