Colo. Rev. Stat. § 34-43-115
If at any time the locator of any mining claim, or his assigns, apprehends that his original certificate is defective, erroneous, or that the requirements of the law had not been complied with before filing, or is desirous of changing his surface boundaries, or of taking in any part of an overlapping claim which has been abandoned, or in case the original certificate was made prior to June 1, 1874, and he is desirous of securing the benefits of this article, such locator, or his assigns, may file an additional certificate, subject to the provisions of this article, if his relocation does not interfere with the existing rights of others at the time of such relocation. No such relocation or other record thereof shall preclude the claimant from proving any such title as he may hold under previous location.
C.R.S. § 34-43-115