Pitkin County planning commission continues airport modernization hearing amid noise and air‑quality worries

The Pitkin County Planning & Zoning Commission on April 7 continued a public hearing on the Aspen airport modernization program after hearing technical briefings from county staff, aviation consultants and Atlantic Aviation and extensive public comment about noise and air quality.

Planning staff opened the session by framing the review as a location‑and‑extent determination: whether the proposed work conforms with the Aspen Area Community Plan (2012) and the Western Maroon Creek master plan. Staff and the project team said the modernization comprises three linked efforts — airfield/runway work, a new commercial terminal and landside improvements, and East Side FBO redevelopment — and that the review packet and draft resolution were provided to the commission.

Project scope, schedule and funding Program staff and design teams described the planned changes in detail. The runway will shift roughly 80 feet west and be widened to about 150 feet; taxiway geometry largely remains but apron and de‑ice facilities will be reconstructed to current standards. Enabling work scheduled for 2026 includes a roughly 400‑foot culvert extension for Owl Creek and relocation of a short section of Owl Creek Road and the adjacent trail. The project team said enabling work would preserve airport operations and that the runway closure needed to perform the runway move is planned for spring 2027 (an April–November closure period was cited), with the larger program moving through 2028–2030 for subsequent work.

Designers said schematic terminal design is currently in the 130,000–140,000 square‑foot range, with programming aimed at replacing a terminal the team described as beyond its useful life and at improving baggage, security and employee space. The FBO campus presentation outlined a phased replacement of fuel, hangar and ground‑service equipment facilities and proposed landscape screening and acoustic mitigation along State Highway 82.

Noise, contours and Part 150 Commissioners pressed the project team on noise and what an FAA Part 150 study would or would not do for local planning. Former airport director Dan (joined remotely) and other consultants explained that a Part 150 study is typically funded by the FAA when 65 DNL contours extend off‑airport; project consultants said existing FAA contours do not, historically, extend beyond airport property and noted the airport curfew lowers 24‑hour DNL calculations. Commissioners asked staff to provide the noise‑contour maps and monitoring data that underlie those statements so the commission can evaluate potential land‑use implications (for example, where higher noise contours would limit residential uses).

Public health and ultrafine particles Several members of the public urged the commission to require baseline air‑quality monitoring for ultrafine particles (UFPs) and other pollutants before approving major design decisions. Ellen Anderson, who said she lives in Aspen Village and previously worked in local emergency management, summarized short‑term measurements and raised concern that brief monitoring runs showed minute‑scale spikes well above World Health Organization short‑term guidance: "When the airport closes, the number of ultrafine particles plummets. When the airport opens, they go back up…people, we have a problem, a deadly problem," she said. Commenters asked the county to measure UFPs specifically (they said county monitoring had focused on regulated pollutants) and to publish baselines that could inform noise‑ and health‑mitigation measures for terminal staff and nearby neighborhoods.

FBO sound wall, air quality and design tradeoffs Atlantic Aviation and its architects showed renderings of a proposed sound wall (20 feet tall in some active ramp areas) and explained how berms, trees and architectural treatments would reduce the visual and acoustic profile from Highway 82. Several neighbors queried whether a tall wall could redirect aircraft exhaust or APUs toward residential areas; FBO representatives said the wall and berm would reduce sound exposure on the highway side and that electric ground power units reduce diesel particulate exposure on the ramp, but they told commissioners that direct testing and contour modeling remain important.

Commission discussion and continuance Commissioners debated whether to assess the application under the 2012 master plan language (the governing standard) or wait to evaluate conformance against the forthcoming county comprehensive plan. Several commissioners said the technical and public‑health questions (noise contours, Part 150 context, ultrafine‑particle baselines, air‑quality permitting for on‑site asphalt/batch plant, and the FAA’s non‑land‑use mandates) needed clearer documentation before a final land‑use finding.

After extensive discussion the commission voted to continue the location & extent public hearing and requested a short list of follow‑up materials from staff and the applicant: noise‑contour maps and monitoring data (including any recent DNL or contour work), clarification of which design elements are FAA‑mandated versus discretionary, a clearer breakdown of program phasing and the project funding schedule, and any air‑quality monitoring available (and whether ultrafine‑particle sampling can be scheduled). The commission set a special P&Z meeting to reconvene the hearing on April 14 for those follow‑ups.

Next steps Staff agreed to assemble answers to the commission’s data requests and to coordinate with the applicant’s teams on the requested analyses. Commissioners emphasized they would apply the location‑and‑extent ordinance criteria and the applicable master plans when they next meet; any final P&Z decision could be appealed or reviewed by the Board of County Commissioners under the county’s land‑use code.

Quotes "When the airport closes, the number of ultrafine particles plummets. When the airport opens, they go back up…people, we have a problem, a deadly problem," Ellen Anderson, public commenter. "We are proceeding with a funding path that currently includes significant FAA support, but until we have written commitments some elements remain contingent," Ryan Mahoney, deputy county manager (summarizing FAA funding sequencing).

Ending The commission left the hearing open and scheduled a special meeting for April 14 to receive the requested noise, air‑quality and FAA/mandate clarifications and to continue public testimony; no final land‑use determination was made at the April 7 session.