Specifications include, but are not limited to: The objective of this Invitation to Negotiate (ITN) is to enable the University of Central Florida (UCF) to enter into an agreement with a Supplier to provide general contracting services for the development of a concrete building and blocks within the Arecibo Observatory (AO), located in Arecibo, Puerto Rico, including, but not limited to, the partial demolition and disposition of the material of the existing structure that is built in metal on a concrete base and that can extend beyond the current footprint of the original structure. In the demolition of the building, the floor will be left in concrete and will be built on it. The extension of the building will be on natural land where there is a section of an asphalt road, where rock could be found. This area already has the corresponding utilities for water, electricity, toilets and communications.