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John Glenn
april 8, 2020: online public meeting display boards
This graphic shows a flow chart diagram of the basic steps of a Part 150 Noise Compatibility Study. As of April 1, 2020, the Study Team has conducted data collection, forecasting, radar data analysis, and has prepared the “preliminary draft” Existing (2020) and Future (2025) Baseline Noise Exposure Contours.
2. Land Use / Noise Sensitivity Matrix
This matrix shows the basic land uses that are compatible or incompatible with various noise levels based on Part 150 guidelines. All land uses are compatible with levels below 65 DNL.
3. How Noise Contours Are Generated
This graphic presents the basic input and output data used for computer generated noise contours. The Federal Aviation Administration requires the use of the Aviation Environmental Design Tool (AEDT) to model noise for airports using the Day-Night Average Sound Level (DNL) noise metric. In the calculation of the DNL noise metric, nighttime flights (between 10:00pm and 6:59am) are weighted to account for increased sensitivity to noise at night.
This graphic shows a comparison of aircraft single event noise levels to other common household and outdoor noise sources.
This graphic shows individual noise footprints of several typical aircraft at CMH. In these examples, the noise levels show a comparison of the noise of a single aircraft arrival (from the left) and departure (to the right). The most common aircraft types at CMH are the Boeing 737-700 and the Embraer EMB-175.
6. Noise Measurement Program Sites
This graphic shows a map of the Airport’s permanent noise monitors that collect data 365 days per year; and the short-term noise measurement locations from which additional data was collected for this Study conducted in November 2019. This data is used to help prepare input data for the noise model.
7. 2020 Operation Levels and Fleet Mix
This graphic includes a table showing the total number of aircraft operations modeled for the Existing (2020) Baseline Noise Exposure Contour; broken down by arrivals and departures and by daytime (7:00am – 9:59pm) and nighttime (10:00pm. – 6:59pm). Approximately 17 percent of aircraft operations at CMH occur at night.
8. 2025 Operation Levels and Fleet Mix
This graphic includes a table showing the total number of aircraft operations modeled for the Future (2025) Baseline Noise Exposure Contour; broken down by arrivals and departures and by daytime (7:00am – 9:59pm) and nighttime (10:00pm. – 6:59pm). Approximately 17.5 percent of aircraft operations at CMH are expected to occur at night based on the future 2025 forecast.
These maps show the percentage of time each runway end is used for arrival and departure based on average-annual conditions in 2018-2019. There are two east-west parallel runways at CMH with four total runway ends labeled 10L, 10R, 28L and 28R. West flow is the most common runway use pattern at CMH and occurred approximately 77 percent of the time at CMH from September 2018 through August 2019.
This map shows the flight tracks used to model the Existing (2020) and Future (2025) Baseline Noise Exposure Contours compared to radar data flight tracks for a typical day in east flow (when aircraft land from the west and take off to the east on Runways 10L and 10R) at CMH.
This map shows the flight tracks used to model the Existing (2020) and Future (2025) Baseline Noise Exposure Contours compared to radar data flight tracks for a typical day in west flow (when aircraft arrive from the east and takeoff to the west on Runways 28L and 28R) at CMH.
12. Existing (2020) Noise Exposure Contour
This map shows the “Preliminary Draft” Existing (2020) Baseline Noise Exposure Contour that has been developed for this Part 150 Noise Compatibility Study overlaid onto a land use base map. The Existing (2020) Baseline Noise Exposure Contour will become the official existing noise exposure contour once it has been thoroughly reviewed, approved by the Columbus Regional Airport Authority and accepted by the Federal Aviation Administration.
13. Future (2025) Noise Exposure Contour
This map shows the “Preliminary Draft” Future (2025) Baseline Noise Exposure Contour that has been developed for this Part 150 Noise Compatibility Study overlaid onto a land use base map. The Future (2025) Baseline Noise Exposure Contour will be used as a baseline to compare the effects of any additional noise abatement measures. Once all measures have been incorporated a Future (2025) NEM/NCP Noise Exposure Contour will be developed and will become the become official future noise exposure contour once it has been thoroughly reviewed, approved by the Columbus Regional Airport Authority and accepted by the Federal Aviation Administration.
This map shows a comparison of the “Preliminary Draft” Existing (2020) Baseline Noise Exposure Contour and the “Preliminary Draft” Future (2025) Baseline Noise Exposure Contour.
14a. Comparison of Existing (2020) and (2025) Baseline Noise Exposure Contour – East Side
This map shows a close-up view of the “Preliminary Draft” Existing (2020) Baseline Noise Exposure Contour and the “Preliminary Draft” Future (2025) Baseline Noise Exposure Contour to the east of the Airport.
14b. Comparison of Existing (2020) and (2025) Baseline Noise Exposure Contour – West Side
This map shows a close-up view of the “Preliminary Draft” Existing (2020) Baseline Noise Exposure Contour and the “Preliminary Draft” Future (2025) Baseline Noise Exposure Contour to the west of the Airport.
15. Comparison of Noise Contour Areas and Land Use Impacts
This table shows the total land area, housing units, and estimated population within the 65 DNL and higher noise contours for the “Preliminary Draft” Existing (2020) Baseline Noise Exposure Contour, the “Preliminary Draft” Future (2025) Baseline Noise Exposure Contour, and the Future (2012) NEM/NCP Noise Exposure Contour that was prepared for the 2007 Part 150 Study at CMH. The 65 DNL noise contour is the threshold at which residential land uses are considered potentially incompatible with aircraft noise according to Part 150 guidelines. There are no housing units or other noise-sensitive land uses within the 65 DNL of the Existing (2020) Baseline Noise Exposure Contour. There are two housing units and one noise-sensitive land use within the 65 DNL of the Future (2025) Baseline Noise Exposure Contour.
16. Providing Input and Next Steps
This lists the expected next steps and methods for providing comments on this Part 150 Noise Compatibility Study.