The Dalles Radio VOR, identified by the frequency 117.9 and the designator DLS, represents a tangible piece of mid-twentieth century aviation infrastructure whose physical remnant has surfaced on private land in the Pacific Northwest. Historical aeronautical charts from 1955, 1967, and 1968 document the navaid's operational life and positional evolution, revealing that the original transmitting equipment was eventually relocated to the site now occupied by the Klickitat VOR/DME. The frequency was changed as part of that migration, and the facility was simultaneously downgraded from VORTAC status — which includes the military TACAN component — to a civilian VOR/DME configuration before ultimately being decommissioned. What makes this discovery notable is that the original VOR housing, typically demolished or removed when a station is abandoned, survived on its original footprint and remains structurally intact on private property.
The physical transition documented here — VORTAC to VOR/DME to decommissioned — mirrors a pattern that has played out hundreds of times across the National Airspace System over the past several decades. The FAA has been executing a systematic reduction of the VOR network under its VOR Minimum Operational Network (MON) program, which is designed to retain only enough ground-based navaids to allow instrument-rated pilots to navigate and reach a suitable airport during a GNSS outage. The MON targets coverage at or above 5,000 feet AGL across most of the contiguous United States, preserving roughly 600 VORs from an earlier network that once numbered over 1,000 facilities. Stations like The Dalles Radio, which were either redundant in coverage or located in areas now adequately served by RNAV and GNSS approaches, became candidates for consolidation or elimination.
For working pilots — particularly those operating under Part 91, 91K, or 135 in the Pacific Northwest — the Klickitat VOR/DME that absorbed the DLS transmitter mission continues to serve as an en route and terminal reference. Understanding the lineage of these navaids matters operationally because legacy approach plates, older avionics databases, and historical instrument procedures may reference deprecated identifiers or prior frequencies. Pilots flying older aircraft that rely on VOR as a primary navigation source in this region should verify current chart currency and confirm that their avionics databases reflect the active Klickitat facility rather than any legacy DLS depictions that may appear in older publications or non-updated FMS data cards.
The broader significance of this find extends into the ongoing conversation about infrastructure dependency in aviation. The FAA's gradual consolidation of VOR coverage, combined with the rapid proliferation of RNP AR, LPV, and LNAV/VNAV approaches, has shifted the navigation paradigm decisively toward satellite-based systems. Ground-based navaids like this one served as the backbone of IFR navigation for nearly half a century, and their decommissioning represents not just a technical transition but the end of a specific era in how pilots were trained and how the airspace was structured. The survival of a physical VOR housing — concrete, antenna mast, and equipment shelter — in an essentially unaltered state offers a rare three-dimensional reference for what the aeronautical charts of the 1950s and 1960s actually represented on the ground, a connection that most pilots today encounter only as abstract symbols on en route charts.