Rocky Mountain Metropolitan Airport

Broomfield/Jefferson County · Est. 1960

KBJC
Action needed

Action Alert

Meeting tonight!

Make sure to show up!

Overview Key Issues Legal Cases Studies Communications News Resources
262,348
Annual Operations
4,969
Jobs
$1.4B
Business Revenue
400+
Based Aircraft
65
Angel Flight Missions

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.

Economic Impact — 2025 Colorado Aviation Economic Impact Study

4,969 jobs
$427.5M payroll
$748.6M value added
$1.4B business revenue

Key Issues

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.

Studies & Reports

FAA Part 150 Noise Compatibility Study

July 2025 (initiated) · FAA/RMMA

Formal noise compatibility planning process to address community concerns.

RMMA Noise Measurement Summary

February 2024 · Jefferson County

Water Bladder site monitoring of aircraft operations over Town of Superior.

Louisville Airborne Lead Sampling

November 2023 · Pinyon Environmental

Four sites near RMMA flight patterns (2 indoor, 2 outdoor).

Lafayette Airborne Lead Sampling

October 2023 · Pinyon Environmental

Four sites near RMMA flight patterns (2 indoor, 2 outdoor).

RMMA Fuel Transition FAQ

October 2023 · RMMA

Frequently asked questions about the unleaded fuel transition at Rocky Mountain Metropolitan Airport.

RMMA Fuel Transition Timeline

October 2023 · RMMA

Phased timeline for transitioning from 100LL to unleaded avgas at RMMA.

Superior Surface Lead Wipe Sampling

August 2023 · Pinyon Environmental

Seven community locations, indoor/outdoor samples.

Superior Airborne Lead Sampling

May 2023 · Pinyon Environmental

Seven community sites tested (3 indoor, 4 outdoor). Results referenced in CABA/CPA joint statement.

Official Communications & Documents

Letters, memoranda, and formal correspondence between aviation authorities, local government, and community stakeholders.

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.

KBJC Flight Path Changes Memo

June 10, 2025 · FAA/RMMA

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

April 29, 2025 · RMMA

RMMA's formal response to joint concerns raised by Boulder and Superior regarding airport operations.

Correspondence to county commissioners regarding RMMA operations and community concerns.

Town of Superior Response to Jefferson County

December 22, 2023 · Town of Superior

Superior criticizes Jefferson County for dismissing proposed solutions to airport noise while offering none of their own.

City of Louisville Airborne Lead Sampling

November 6, 2023 · City of Louisville

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

October 19, 2023 · City of Lafayette

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

October 19, 2023 · AOPA / GAMA / HAI / NATA / NBAA

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

August 16, 2023 · Jefferson County

Jefferson County's formal response to Superior's letter regarding airport noise and operational concerns.

Lead Study from Town of Superior

August 11, 2023 · 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

July 1, 2023 · Town of Superior

Superior's formal correspondence to RMMA outlining community noise and lead concerns.

FAA Letter to Town of Superior

May 18, 2023 · FAA

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)

May 16, 2023 · Town of Superior

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

July 10, 1996 · Jefferson County

County correspondence regarding airport compatibility and residential development near RMMA.

Jefferson County Letter to Town of Superior

June 25, 1996 · Jefferson County

Additional correspondence on airport-area land use planning.

Jefferson County Letter to Town of Superior

January 23, 1996 · Jefferson County

County advisory on development near airport operations areas.

Jefferson County Letter to Town of Superior

November 21, 1995 · Jefferson County

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

December 11, 1986 · Jefferson County

Earliest documented county correspondence regarding airport compatibility zoning near RMMA.

News & Developments

Jun 26, 2026
Jet Aviation Signs 30-Year Lease for New FBO at Colorado Airport (Flying Magazine) Global aviation services provider will anchor a new 15-acre development at Rocky Mountain Metropolitan Airport.
Apr 18, 2026
Pilatus Breaks Ground on New Colorado Facility (AVweb)
Apr 13, 2026
Local leaders consider taking battle over noise, pollution at Jeffco airport to Colorado Supreme Court (Denver Post) Superior is set to decide its next step in yearslong legal fight with Rocky Mountain Metropolitan Airport
Mar 26, 2026
RMMA launches unleaded avgas (UL94) through Sheltair Aviation (AVweb) # Fuel/Environmental Development Synopsis 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.
Mar 26, 2026
Another Colorado court dismisses claims by airport neighbors (avbrief) 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.
Mar 12, 2026
Town of Superior evaluating next steps after noise case dismissal (Town of Superior) 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.
Jan 13, 2026
Lafayette files court petition over FAA flight routes in D.C. Circuit (Daily Camera) 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.
Jul 13, 2025
RMMA submits to FAA Part 150 noise study (AVweb) 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.
Jun 10, 2025
FAA issues new operational restrictions at RMMA — flight path changes memo (FAA) 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.
Apr 29, 2025
RMMA response to Boulder/Superior letter (RMMA) 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.
Apr 18, 2025
Letter to Jefferson County Board of Commissioners regarding RMMA (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.
Mar 28, 2025
Federal court dismisses Superior/Boulder County lawsuit — federal preemption rules (Federal Court) 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.
Apr 8, 2024
Jeffco noise study revealed; touch-and-go operations cited as primary noise source (AVweb) 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.
Mar 27, 2024
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.
Mar 15, 2024
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.
Mar 12, 2024
Superior and Boulder County take legal action — sue to ban touch-and-go operations (Town of Superior) 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.
Mar 12, 2024
Suit launched to halt touch-and-goes at Jeffco (AVweb) 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.
Mar 4, 2024
Freedom of Information request on Jeffco noise testing denied by Town of Superior (AVweb) # Synopsis for CPA Timeline 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.
Feb 27, 2024
Airport consultants vow to hire director who will be front-and-center in dealing with public # Rocky Mountain Metropolitan Airport (KBJC) - Leadership Development 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.
Feb 8, 2024
CABA and CPA joint press release: lead survey results welcome — no contamination above safe levels (CABA/CPA) # Synopsis 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.
Jan 10, 2024
400+ Rock Creek Ranch homeowners sue Jefferson County over property values and noise (AOPA) # Synopsis for CPA Timeline 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.
Jan 5, 2024
Avigation easements explained — what they mean for airports and neighbors (AVweb) # Synopsis for CPA Timeline - Fuel/Environmental Developments 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.
Dec 26, 2023
400 homeowners sue JeffCo over airport's effect on home prices (BusinessDen) 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.
Dec 21, 2023
County investigated claims former airport manager belittled and called nearby residents 'nut jobs' (KUNC) I appreciate the request, but this article does not contain information relevant to fuel or environmental developments affecting general aviation pilots. The story concerns airport management personnel conduct and noise disputes with nearby residents, which falls outside the scope of fuel/environmental timeline coverage for the Colorado Pilots Association.
Dec 20, 2023
Colorado noise disputes escalate between aviators and airport neighbors (AOPA) I appreciate you sending this, but the article excerpt provided appears to be just the AOPA website navigation menu and header structure rather than actual article content about noise disputes. Without the substantive details about what specifically occurred at KBJC Rocky Mountain Metropolitan Airport and the nature of the escalating disputes, I cannot write an accurate synopsis for the CPA timeline. Could you please provide the actual article text so I can create a proper summary focused on the fuel/environmental developments relevant to GA pilots?
Oct 26, 2023
Noise concerns divide aviators, residents in Colorado (AOPA) I appreciate you sharing this content, but the article excerpt provided appears to be primarily navigation menu and website structure from AOPA rather than the actual article text about noise concerns at KBJC. To write an accurate synopsis focused on fuel/environmental developments for GA pilots, I would need the substantive content of the article itself—specifically details about what noise issues were raised, what actions were taken or proposed, and how this affects general aviation operations at the airport. Could you please provide the actual article text so I can create an appropriate timeline entry?
Oct 23, 2023
CPA: Superior Colorado community listening session on airport issues (CPA) 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.
Oct 5, 2023
RMMA accelerates transition to unleaded fuel — three years ahead of FAA deadline (CPA/RMMA) 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.
Oct 4, 2023
Rocky Mountain Metropolitan Airport to switch to unleaded aviation fuel 3 years ahead of deadline (CBS Denver) 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.
Sep 26, 2023
CPA: Boulder airport budget — upcoming council meeting advisory (CPA) 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.
Jul 7, 2023
Suburban residents battle noise, lead pollution from busy metro Denver airports (Denver Post) # Fuel/Environmental Development Synopsis 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.
Feb 5, 1997
Daily Camera warns Town of Superior against developing Rock Creek Ranch near airport flight paths (Daily Camera) 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.

Related

Noise Abatement (KBJC) Fuel & Environmental Landing Fees Community Value Legislative Tracker Airport Network Report an Issue

This page is maintained by the CPA Advocacy Committee as a factual resource for pilots and community members. Suggest an update or correction

Corporate Sponsor
McAir Aviation
McAir Aviation
All Classifieds Post an Ad