Amendment of Class E Airspace; Alamosa, CO

This action modifies the Alamosa, CO, Class E airspace by increasing the radius of the Class E surface area, and by expanding the lateral boundaries of the Class E airspace at and above 1,200 feet Above Ground Level (AGL). The additional controlled airspace is necessary to contain two Standard Instrument Approach Procedures (SIAP) which have recently been developed for the Alamosa Airport. The intended effect of this action is to provide the additional controlled airspace necessary to enable the FAA to provide Instrument Flight Rules (IFR), Air Traffic Control (ATC) services and separation to IFR aircraft operating on the SIAP's and transitioning between the terminal and en route environments. The areas will be depicted on aeronautical charts for pilot reference.