Colorado Revised Statutes Title 41. Aeronautics: Aircraft and Airports § 41-4-109. Encroachment a nuisance

It is unlawful for anyone to build, rebuild, create, or cause to be built, rebuilt, or created any object or plant or cause to be planted or permit to grow higher any tree or other vegetation which shall encroach upon any airport protection privileges acquired pursuant to the provisions of section 41-4-108, but it is lawful to make maintenance repairs to or to replace parts of existing structures which do not enlarge or increase the height of an existing structure. Any such encroachment is declared to be a public nuisance and may be abated in the manner prescribed by law for the abatement of public nuisances; or the county, city and county, city, or town or the board in charge of the airport or landing field for which airport protection privileges have been acquired may go upon the land of others and remove any such encroachment without being liable for damages.