City of Yuma Improvement Act - Directs the Secretary of the Interior to convey all U.S. interests in specified federal land in Arizona to the city of Yuma, Arizona, in exchange for specified nonfederal land (Railroad Parcels).
Requires the Secretary, acting through the Commissioner of Reclamation, to administer the nonfederal land acquired.
Requires all administrative costs relating to the conveyance of the federal and nonfederal land to be paid by the city to the United States.
Requires an independent appraisal of the federal and nonfederal land in accordance with the Uniform Appraisal Standards for Federal Land Acquisition and the Uniform Standards of Professional Appraisal Practice.
Requires the values of the federal and nonfederal land to be equal. Permits the equalization of unequal land values by means of cash equalization payments.
Directs the Secretary to convey to the city, by quitclaim deed, in exchange for its fair market value, all U.S. interests in and to the parcel of land of U.S. Fish and Wildlife Service land located at 356 West First Street in Yuma.
Requires the city, in exchange for such conveyance, to pay to the Secretary consideration in an amount that reflects the fair market value of the land conveyed to the city.
Requires any administrative costs related to such conveyance to be paid by the city to the United States.
Makes amounts paid to the Secretary as consideration available for: (1) the administrative costs of such conveyance to the city; and (2) the costs of constructing the Kofa National Wildlife Refuge headquarters and visitor center in Yuma.