Specifications include, but are not limited to: Qualified engineering firms for engineering services for proposed development on the Custer County Airport (CUT), South Dakota. Construct East Taxilane Extension to the South -- Design 2022 Construct East Taxilane Extension to the South -- Construction 2023 Supplemental Planning Runway 8-26 Extension Justification 2024 Environmental Assessment Widen Runway 8-26 to 75-ft, Rehabilitate Runway 8-26, Extend Runway 8-26 by 700-ft, MIRL System, Turnaround 2025 Design Widen Runway 8-26 to 75-ft, Rehabilitate Runway 8-26, Extend Runway 8-26 by 700-ft, MIRL System, Turnaround 2026 Construction Widen Runway 8-26 to 75-ft, Rehabilitate Runway 8-26, Extend Runway 8-26 by 700-ft, MIRL System, Turnaround 2027 Construct Partial Parallel Taxiway from Runway 8-26 to Current Taxiway 2027.