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KBJC Rocky Mountain Metropolitan Airport
Broomfield/Jefferson County · Est. 1960
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Latest news 32 stories
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Jet Aviation Signs 30-Year Lease for New FBO at Colorado Airport
Global aviation services provider will anchor a new 15-acre development at Rocky Mountain Metropolitan Airport.
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Superior is set to decide its next step in yearslong legal fight with Rocky Mountain Metropolitan Airport
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RMMA launches unleaded avgas (UL94) through Sheltair Aviation
Rocky Mountain Metropolitan Airport in Colorado began offering Swift Fuels UL94 unleaded avgas in February 2026, supported by state-subsidized pricing and STC reimbursement programs, following community health concerns about lead emissions near airports. This initiative aligns with the FAA's goal to transition the national GA fleet to unleaded fuel by 2030, though current adoption remains limited to aircraft with STCs, and some pilots report engine overheating concerns with the new fuel.
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Another Colorado court dismisses claims by airport neighbors
A Colorado court dismissed claims by Rocky Creek Ranch residents near Rocky Mountain Metropolitan Airport who alleged aircraft noise, vibration, and lead emissions damaged property values, ruling they failed to demonstrate unique injuries different from the general public. The decision reinforces established case law protecting airport operations from nuisance lawsuits while signaling that future litigation may increasingly focus on lead emissions as the primary concern for GA operations.
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Town of Superior evaluating next steps after noise case dismissal
A Colorado court dismissed a noise complaint case against Rocky Mountain Metropolitan Airport, eliminating a potential precedent for stricter noise regulations that could have affected general aviation operations at KBJC and similar regional airports.
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Lafayette files court petition over FAA flight routes in D.C. Circuit
Lafayette has filed a federal court petition challenging FAA-implemented flight procedure changes at Rocky Mountain Metropolitan Airport, arguing the agency violated multiple laws by failing to conduct environmental review or community engagement before concentrating arrival routes over the city. The dispute highlights tension between the FAA's safety and efficiency objectives and community concerns about noise impacts from altered flight paths.
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RMMA submits to FAA Part 150 noise study
Rocky Mountain Metropolitan Airport (Jeffco) has initiated an FAA Part 150 Noise Compatibility Planning study to address community complaints about aircraft noise and leaded avgas emissions, a two-year process that will analyze existing noise data and identify mitigation measures where airport noise exceeds the FAA's 65-decibel threshold. This formal study matters to GA pilots as it could result in operational restrictions or changes at a major Colorado general aviation facility serving the Front Range aviation community.
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FAA issues new operational restrictions at RMMA — flight path changes memo
The FAA implemented new operational restrictions at Rocky Mountain Metropolitan Airport (KBJC) in response to noise complaints from surrounding communities, requiring aircraft to follow modified flight paths during certain hours. These changes affect general aviation operations in the Denver metro area and may impact flight planning and routing for GA pilots using the facility.
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RMMA response to Boulder/Superior letter
The Rocky Mountain Metropolitan Airport Association responded to concerns raised by Boulder/Superior residents regarding airport noise, addressing community opposition to aviation operations at this Colorado general aviation facility.
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Letter to Jefferson County Board of Commissioners regarding RMMA
A community group raised noise concerns to Jefferson County commissioners regarding Rocky Mountain Metropolitan Airport (KBJC), highlighting ongoing tensions between airport operations and residential areas that could impact GA pilot access and operations at the facility.
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Federal court dismisses Superior/Boulder County lawsuit — federal preemption rules
A federal court ruled that local noise regulations at Rocky Mountain Metropolitan Airport in Superior/Boulder County are preempted by federal aviation law, dismissing the lawsuit brought by nearby residents and allowing continued airport operations under federal rather than local oversight.
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Jeffco noise study revealed; touch-and-go operations cited as primary noise source
A noise study at Rocky Mountain Metropolitan Airport (KBJC) identified touch-and-go operations as the primary source of noise complaints in the surrounding community, potentially influencing future flight training policies at the airport.
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Broomfield leaves airport noise group, blasts Jefferson County for lack of progress
Broomfield city officials withdrew from a noise advisory group at Rocky Mountain Metropolitan Airport (KBJC), citing frustration with Jefferson County's lack of progress on addressing aircraft noise complaints from residential areas. The departure underscores ongoing community concerns about airport operations and their impact on local neighborhoods, which could influence future regulatory or operational decisions affecting general aviation at the facility.
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Concerned over lead found in homes, Superior trustees point to Rocky Mountain Metropolitan Airport
Superior town trustees expressed concerns about lead contamination in residential areas near Rocky Mountain Metropolitan Airport (KBJC), potentially linked to leaded aviation fuel emissions from the facility. The issue highlights ongoing tensions between GA operations and nearby communities regarding environmental impacts from 100LL fuel use at general aviation airports.
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Superior and Boulder County take legal action — sue to ban touch-and-go operations
Superior and Boulder County filed a lawsuit seeking to ban touch-and-go operations at Rocky Mountain Metropolitan Airport (KBJC), citing noise concerns from the surrounding community. This legal action could restrict common GA training practices at a major Front Range airport if successful.
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Suit launched to halt touch-and-goes at Jeffco
A lawsuit has been filed to restrict touch-and-go operations at Jefferson County Airport (KBJC), reflecting ongoing tensions between the airport and noise-sensitive neighboring communities. This litigation could impact training operations and GA pilot access to a major metropolitan training facility if flight restrictions are imposed.
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Freedom of Information request on Jeffco noise testing denied by Town of Superior
A GA pilot's Colorado Open Records Act request for noise studies commissioned by the Town of Superior regarding Rocky Mountain Metropolitan Airport was denied on attorney-client privilege grounds, despite the town previously releasing lead-pollution test results from the same studies—raising questions among some about transparency in ongoing litigation between residents and the airport.
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Airport consultants vow to hire director who will be front-and-center in dealing with public
KBJC leadership is committing to hire a dedicated director to address community noise concerns and improve public engagement, signaling a prioritization of stakeholder relations at the airport. This development could impact future noise mitigation policies and community-airport relations affecting general aviation operations at this Denver-area facility.
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CABA and CPA joint press release: lead survey results welcome — no contamination above safe levels
A joint survey by the Colorado Pilots Association and Colorado Aviation Business Association found no lead contamination above EPA safe levels at Rocky Mountain Metropolitan Airport, addressing community concerns about lead emissions from leaded avgas used in general aviation. The results are significant for GA pilots as they provide data supporting the continued use of leaded fuel while regulatory discussions around avgas alternatives continue.
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400+ Rock Creek Ranch homeowners sue Jefferson County over property values and noise
Over 400 homeowners near Rocky Mountain Metropolitan Airport (KBJC) in Jefferson County are suing over property value decline and noise impacts from airport operations, highlighting ongoing community tensions between residential development and general aviation activities that GA pilots should monitor for potential regulatory implications.
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Avigation easements explained — what they mean for airports and neighbors
This article clarifies avigation easements, legal mechanisms that protect aircraft operations by restricting development near airports and preventing neighbors from suing for noise impacts—matters relevant to GA pilots as they affect airport operations and community relations. While avigation easements can be removed, the FAA retains sole authority over airspace and airport operations, meaning removal doesn't grant local control over flight paths or reduce noise compliance obligations.
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400 homeowners sue JeffCo over airport's effect on home prices
Four hundred homeowners near Rocky Mountain Metropolitan Airport are suing Jefferson County, alleging the airport violates airspace rights (previously narrowed by court order), causes lead contamination, and depresses home values through increased noise and pollution from surging operations. The lawsuit highlights ongoing tensions between GA operations at the expanding airport and residential communities, with residents claiming the county has intensified flight activities despite a 2021 court ruling that eliminated nine of the airport's 29 avigation easements.
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County investigated claims former airport manager belittled and called nearby residents 'nut jobs'
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Colorado noise disputes escalate between aviators and airport neighbors
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CPA: Superior Colorado community listening session on airport issues
A Superior, Colorado community listening session addressed noise concerns and operational issues at Rocky Mountain Metropolitan Airport (KBJC), highlighting ongoing tensions between airport operations and neighboring residents that could influence local aviation policies.
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RMMA accelerates transition to unleaded fuel — three years ahead of FAA deadline
Rocky Mountain Metropolitan Airport is transitioning its fleet to unleaded aviation fuel three years ahead of the FAA's 2030 deadline, which could influence fuel availability and pricing across Colorado's general aviation community. This accelerated shift addresses environmental and health concerns while potentially impacting how GA pilots source fuel at regional airports.
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Rocky Mountain Metropolitan Airport to switch to unleaded aviation fuel 3 years ahead of deadline
Rocky Mountain Metropolitan Airport (KBJC) announced it will transition to unleaded aviation fuel three years ahead of the FAA's deadline, making it the fastest-growing airport in Colorado to embrace this environmental shift. This early adoption matters to GA pilots as it demonstrates industry-wide momentum toward eliminating lead emissions from general aviation, potentially accelerating availability and affordability of unleaded fuel options at other airports.
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CPA: Boulder airport budget — upcoming council meeting advisory
Boulder's Rocky Mountain Metropolitan Airport (KBJC) budget proposal is heading to an upcoming city council meeting amid ongoing community noise concerns. The outcome could affect airport operations and GA pilot access to this metro-area facility.
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Suburban residents battle noise, lead pollution from busy metro Denver airports
Suburban residents near Rocky Mountain Metropolitan Airport and Centennial Airport in metro Denver are filing complaints about increased noise and lead pollution from aircraft operations, as growing flight activity impacts nearby communities and raises environmental health concerns for GA pilots operating in the region.
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Daily Camera warns Town of Superior against developing Rock Creek Ranch near airport flight paths
The Town of Superior received warnings about proposed development at Rock Creek Ranch due to its location within flight paths of KBJC Rocky Mountain Metropolitan Airport, raising concerns about noise impacts on future residents and potential conflicts with airport operations.
Background
About Rocky Mountain Metro
RMMA is a 1,700-acre general aviation airport serving the Denver metro area with over 260,000 annual operations, 400+ based aircraft, and 50+ businesses. It is Colorado's third-busiest airport and generates $1.4 billion in business revenue. The airport faces ongoing legal challenges from surrounding communities over noise, lead emissions, and flight training operations — while simultaneously leading the state in unleaded fuel transition.
Noise & Flight Training
Four flight schools operate at KBJC, generating significant pattern traffic. Communities including Superior, Lafayette, Louisville, and Broomfield have organized against noise from touch-and-go operations. Operations grew from 191,553 (2019) to 281,806 (2023).
Lead Emissions
Piston aircraft using 100LL avgas deposit lead in surrounding communities. Lead sampling studies conducted by Pinyon Environmental in Superior, Lafayette, and Louisville (2023). CABA/CPA joint statement welcomed findings of no contamination above safe levels.
Residential Encroachment
Rock Creek Ranch development built in airport's noise zone despite 1995-1997 county recommendations against residential construction. Nine avigation easements expired, leading to property value lawsuits.
Unleaded Fuel Transition
RMMA is leading Colorado's transition to unleaded avgas. UL94 available through Sheltair Aviation as of February 2026. Full transition to 100UL targeted within 2-3 years — ahead of the 2030 federal deadline.
Rock Creek Ranch Overflight Lawsuit Partial ruling March 2026
Homeowners allege low-altitude flights after avigation easements expired caused property value damages. March 2026: Court ruled 1,000-foot AGL threshold applies; main compensation claim survives but 'damaging' claim dismissed.
Superior/Boulder County Touch-and-Go Ban Dismissed March 2025 — Appeal pending
Sought injunction to ban piston-engine touch-and-go operations on runways 30L/30R citing noise and lead. Federal court ruled federal preemption — FAA has exclusive authority over flight operations. Lead emissions portion remanded to district court. Superior filed appeal September 2025.
Order of Dismissal (PDF) Original ComplaintNotice of RemovalSuperior Appeal
City of Lafayette FAA Challenge Pending — D.C. Circuit
Challenges FAA VFR arrival/departure routes (LTA-BJC-11). Claims FAA violated APA, NEPA, National Historic Preservation Act, and DOT Act. Argues insufficient public engagement.
FAA Part 150 Noise Compatibility Study
Formal noise compatibility planning process to address community concerns.
RMMA Noise Measurement Summary
Water Bladder site monitoring of aircraft operations over Town of Superior.
Louisville Airborne Lead Sampling
Four sites near RMMA flight patterns (2 indoor, 2 outdoor).
Lafayette Airborne Lead Sampling
Four sites near RMMA flight patterns (2 indoor, 2 outdoor).
Frequently asked questions about the unleaded fuel transition at Rocky Mountain Metropolitan Airport.
Phased timeline for transitioning from 100LL to unleaded avgas at RMMA.
Superior Surface Lead Wipe Sampling
Seven community locations, indoor/outdoor samples.
Superior Airborne Lead Sampling
Seven community sites tested (3 indoor, 4 outdoor). Results referenced in CABA/CPA joint statement.
BJC VFR Arrival/Departure Transition Routes
FAA established new VFR route structure after increased TCAS resolution alerts and close proximity incidents. Lack of route structure identified as contributing factor to safety concerns.
FAA memorandum establishing new operational restrictions — tighter pattern traffic, runway occupancy, IFR sequencing, altitude restrictions, helicopter routing, and LUAW prohibition.
Response to Boulder/Superior Letter
RMMA's formal response to joint concerns raised by Boulder and Superior regarding airport operations.
Letter to Jefferson County Board of Commissioners
Correspondence to county commissioners regarding RMMA operations and community concerns.
Town of Superior Response to Jefferson County
Superior criticizes Jefferson County for dismissing proposed solutions to airport noise while offering none of their own.
City of Louisville Airborne Lead Sampling
City of Louisville airborne lead sampling conducted November 6-9, 2023, completing the first multi-community round of lead monitoring near RMMA.
City of Lafayette Airborne Lead Sampling
City of Lafayette airborne lead sampling conducted October 19-20, 2023, extending the multi-community lead measurement program around RMMA.
Aviation Industry Letter to Colorado Attorney General
Joint letter from AOPA, GAMA, HAI, NATA and NBAA to Attorney General Philip J. Weiser ahead of his Front Range community listening session, setting out the federal preemption framework: the FAA controls aircraft operations and airspace, the EPA controls aircraft emissions standards, and local restrictions on airport use are limited by federal law and grant assurances.
Response from Jefferson County to Town of Superior
Jefferson County's formal response to Superior's letter regarding airport noise and operational concerns.
Lead Study from Town of Superior
Town of Superior's airborne lead-concentration study near Rocky Mountain Metropolitan Airport, measuring ambient lead levels in residential neighborhoods adjacent to the airport.
Town of Superior Letter to KBJC
Superior's formal correspondence to RMMA outlining community noise and lead concerns.
FAA Letter to Town of Superior
FAA states: "A ban or restriction on the sale or use of 100LL (Avgas) at a federally obligated airport is inconsistent with Grant Assurance 22, Economic Nondiscrimination."
Airborne Lead Study — Town of Superior (May 2023)
Town of Superior airborne lead sampling data from May 16-17, 2023 — the first round of coordinated lead monitoring in communities near RMMA.
Jefferson County Letter to Town of Superior
County correspondence regarding airport compatibility and residential development near RMMA.
Jefferson County Letter to Town of Superior
Additional correspondence on airport-area land use planning.
Jefferson County Letter to Town of Superior
County advisory on development near airport operations areas.
Jefferson County Letter to Town of Superior
County recommends that "within these zones, it is recommended that all residential and public buildings...be prohibited" — predating Rock Creek Ranch development by two years.
Jefferson County Letter to Town of Superior
Earliest documented county correspondence regarding airport compatibility zoning near RMMA.
This page is maintained by CPA Government Relations as a factual resource for pilots and community members. Suggest an update or correction