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FACILITY REQUIREMENTS Change 1, Airport Design. This advisory circular outlines design criteria for all design groups depending on the Aircraft Approach Category (AAC), Airplane Design Group (ADG), and Taxiway Design Group (TDG). As identified in Chapter 2, Aviation Demand Forecasts of this master plan, the design aircraft parameters for EUG are determined from a compilation of aircraft using the Airport including the Boeing 737-900 and the Bombardier Q400. The design standards meant to accommodate these aircraft are driven by the following three parameters: »Aircraft Approach Category D »Airplane Design Group III »Taxiway Design Group 5 These parameters equate to an Airport Reference Code (ARC) of D-III and TDG 5. Engineering airfield surfaces to this ARC is critical to maintaining an airfield environment which can safely accommodate the Airport’s critical aircraft. Only those pavement surfaces required to accommodate the design aircraft need be designed to that standard. Some runways and taxiways may only serve small general aviation aircraft. These pavement sections can be designed in an efficient and targeted way which serves the appropriate type of aircraft. The following sections discuss runway design requirements. Taxiway design requirements are discussed later in Section 3.5.4, Taxiway Design of this chapter. Runway Design Analysis of the runways addresses the ability of the existing runways to meet both current and forecast demand. At a minimum, runways must have the proper length, width, and strength to meet FAA recommended design standards in order to safely accommodate the design aircraft. This section analyzes specific runway criteria and makes recommendations based on the forecast. Elements to be examined in this section include runway design group, designation, length, width, strength, and runway protection zones. 3.5.3.1Runway Design Requirements Runway 16R-34L is the Airport’s primary runway and is used by both general aviation and commercial aircraft. Commercial passenger aircraft predominately use this runway due to its location to the terminal, available instrument approaches, and length. As such, this runway must remain at a level of design to support the critical aircraft. Based upon current instrument approaches to this runway, the runway design code (RDC) for 34L is D-III-4000 and for 16R D-III-1200. Runway 16L-34R is the secondary runway at EUG. This runway primarily accommodates general aviation aircraft and flight training operations such as touch-and-go’s. When the primary runway is closed for maintenance, commercial aircraft will use Runway 16L-34R, though some aircraft may take weight penalties due to the shorter runway length offered. The ability for the secondary runway to accommodate commercial aircraft is highly beneficial for the Airport in attracting and maintaining commercial service, as it helps further guarantee airlines operational continuity. In studying the airfield system, it was found that Runway 16L-34R is critical to ensuring safe operations. Discussions with the Eugene ATCT/TRACON Air Traffic Manager identified that EUG ATCT controllers rely EUGENE AIRPORT MASTER PLAN 3-8